Brother names for Kai
KY · 1 syllable
Common across the UK, the Netherlands, Ontario, and 10 more places.
Ranked by fit
40 brother names for Kai, ranked by fit. Add your surname to re-rank.
1 in 252, England and Wales
Say it sih-BAS-chun
Rose and fell with Kai · Same generation as Kai
Loved in Estonia. Common in England and Wales, Italy, Poland, and 10 more places. Rare in France, Israel, the Netherlands, and 13 more places.
1 in 252 boys born in England and Wales in 2025. Number 47 there.
1 in 128, Ireland
Say it LOOK
Rose and fell with Kai · As common as Kai
Common in Ontario, Ireland, Scotland, and 4 more places. Rare in France, England and Wales, Italy, and 15 more places.
1 in 128 boys born in Ireland in 2025. Number 23 there.
1 in 1,105, England and Wales
Say it DOM-ih-nik
Rose and fell with Kai · Same generation as Kai
Rare in all 24 places we hold figures for.
1 in 1,105 boys born in England and Wales in 2025. Number 205 there.
1 in 614, Scotland
Say it MAR-kus
Rose and fell with Kai · Latin, like Kai
Common in Victoria. Rare across France, the UK, Italy, and 19 more places.
1 in 614 boys born in Scotland in 2025. Number 140 there.
1 in 197, England and Wales
Say it LOO-kus
Rose and fell with Kai · Latin, like Kai
Loved in the Netherlands, Ontario, British Columbia, and 2 more places. Common across France, the UK, three Nordic countries, and 11 more places. Rare in Italy, Poland, Israel, and 6 more places.
1 in 197 boys born in England and Wales in 2025. Number 32 there.
1 in 164, England and Wales
Say it ih-LY-juh
Rose and fell with Kai · Same generation as Kai
Loved across three Australian states and New Zealand. Common across the UK, Ontario, Ireland, and 2 more places. Rare in France, Italy, Poland, and 15 more places.
1 in 164 boys born in England and Wales in 2025. Number 23 there.
1 in 196, Scotland
Say it MAY-sun
Rose and fell with Kai · Same generation as Kai
Common across the UK, the Netherlands, Ontario, and 7 more places. Rare in France, Italy, Poland, and 14 more places.
1 in 196 boys born in Scotland in 2025. Number 41 there.
1 in 202, Northern Ireland
Say it LEE-vy
Rose and fell with Kai · Same generation as Kai
Loved across the Netherlands, three German cities, three Australian states, and 1 more place. Common across three Canadian provinces, Israel, Sweden, and 10 more places. Rare in France, England and Wales, Italy, and 4 more places.
1 in 202 boys born in Northern Ireland in 2025. Number 52 there.
1 in 29, Italy
Say it lee-oh-NAR-doh
Rose and fell with Kai · Same generation as Kai
Loved in Italy. Common across Switzerland, four German cities, and New South Wales. Rare across France, the UK, Poland, and 13 more places.
1 in 29 boys born in Italy in 2024. Number 1 there.
1 in 153, Northern Ireland
Say it EE-thun
Rose and fell with Kai · Same generation as Kai
Loved in British Columbia. Common across France, the UK, Italy, and 9 more places. Rare in Poland, Israel, the Netherlands, and 11 more places.
1 in 153 boys born in Northern Ireland in 2025. Number 32 there.
1 in 143, Scotland
Say it HAIR-ih-sun
Rose and fell with Kai · Same generation as Kai
Common across the UK, Ontario, Australia, and New Zealand. Rare in France, Italy, Poland, and 17 more places.
1 in 143 boys born in Scotland in 2025. Number 26 there.
1 in 104, Northern Ireland
Say it FIN
Rose and fell with Kai · Same generation as Kai
Loved in the Netherlands and 1 more place. Common across the UK, Austria, Switzerland, and 12 more places. Rare in France, Italy, Poland, and 7 more places.
1 in 104 boys born in Northern Ireland in 2025. Number 16 there.
1 in 177, Scotland
Say it LOH-gun
Rose and fell with Kai · Same generation as Kai
Common across the UK, three Canadian provinces, Victoria, and South Australia. Rare in France, Italy, Poland, and 15 more places.
1 in 177 boys born in Scotland in 2025. Number 35 there.
1 in 731, England and Wales
Say it JAK-sun
Rose and fell with Kai · Same generation as Kai
Common across three Canadian provinces, three Australian states, and New Zealand. Rare across France, the UK, Italy, and 16 more places.
1 in 731 boys born in England and Wales in 2025. Number 138 there.
1 in 670, England and Wales
Say it JAY-den
Rose and fell with Kai · Same generation as Kai
Common across three Canadian provinces and Victoria. Rare across France, the UK, Italy, and 16 more places.
1 in 670 boys born in England and Wales in 2025. Number 124 there.
1 in 97, England and Wales
Say it OS-ker
Rose and fell with Kai · Same generation as Kai
Loved in England and Wales and Denmark. Common in France, the Netherlands, Sweden, and 14 more places. Rare in Italy, Poland, Israel, and 8 more places.
1 in 97 boys born in England and Wales in 2025. Number 8 there.
1 in 204, England and Wales
Say it EYE-zik
Rose and fell with Kai · Same generation as Kai
Common across France, the UK, three Canadian provinces, and 8 more places. Rare in Italy, Poland, Israel, and 12 more places.
1 in 204 boys born in England and Wales in 2025. Number 36 there.
1 in 319, Northern Ireland
Say it EE-ly
Rose and fell with Kai · Same generation as Kai
Common across Quebec, Northern Ireland, three Australian states, and New Zealand. Rare in France, England and Wales, Italy, and 19 more places.
1 in 319 boys born in Northern Ireland in 2025. Number 90 there.
1 in 162, Northern Ireland
Say it KAY-lub
Rose and fell with Kai · Same generation as Kai
Common across the UK, three Canadian provinces, New Zealand, and South Australia. Rare in France, Italy, Poland, and 15 more places.
1 in 162 boys born in Northern Ireland in 2025. Number 36 there.
1 in 67, Northern Ireland
Say it CHAR-lee
Rose and fell with Kai · Same generation as Kai
Loved across Northern Ireland, three Australian states, and New Zealand. Common across France, England and Wales, three Canadian provinces, and 8 more places. Rare in Italy, Poland, Israel, and 8 more places.
1 in 67 boys born in Northern Ireland in 2025. Number 4 there.
1 in 209, England and Wales
Say it EZ-ruh
Rose and fell with Kai · Same generation as Kai
Common in England and Wales, the Netherlands, Ontario, and 7 more places. Rare in France, Italy, Poland, and 16 more places.
1 in 209 boys born in England and Wales in 2025. Number 38 there.
1 in 913, England and Wales
Say it AY-den
Rose and fell with Kai · Same generation as Kai
Common in the Netherlands, Ontario, British Columbia, and 3 more places. Rare across France, the UK, Italy, and 15 more places.
1 in 913 boys born in England and Wales in 2025. Number 170 there.
1 in 339, England and Wales
Say it JAS-per
Rose and fell with Kai · Same generation as Kai
Common across England and Wales, Ontario, three German cities, and 6 more places. Rare in France, Italy, Poland, and 15 more places.
1 in 339 boys born in England and Wales in 2025. Number 63 there.
1 in 203, Switzerland
Say it KEE-un
Rose and fell with Kai · Same generation as Kai · Same initial as Kai
Common in Sweden, Austria, Switzerland, and 7 more places. Rare across France, the UK, Italy, and 9 more places.
1 in 203 boys born in Switzerland in 2025. Number 18 there.
1 in 46, England and Wales
Say it moo-HAM-ud
Rose and fell with Kai · Same generation as Kai
Loved in England and Wales, Israel, Ontario, and Scotland. Common across five German cities, Ireland, Norway, and 5 more places. Rare in France, Italy, Poland, and 9 more places.
1 in 46 boys born in England and Wales in 2025. Number 1 there.
1 in 755, England and Wales
Say it ASH-er
Rose and fell with Kai · Same generation as Kai
Common across Ontario, British Columbia, Australia, and New Zealand. Rare across France, the UK, Italy, and 17 more places.
1 in 755 boys born in England and Wales in 2025. Number 150 there.
1 in 136, Northern Ireland
Say it JAY-kub
Rose and fell with Kai
Common across the UK, three Canadian provinces, Ireland, and 5 more places. Rare in France, Italy, Poland, and 13 more places.
1 in 136 boys born in Northern Ireland in 2025. Number 27 there.
1 in 444, England and Wales
Say it AW-stin
Rose and fell with Kai
Common in England and Wales, Ontario, Scotland, and 6 more places. Rare in France, Italy, Poland, and 17 more places.
1 in 444 boys born in England and Wales in 2025. Number 86 there.
1 in 267, Northern Ireland
Say it RY-lee
Rose and fell with Kai
Common across the UK, Australia, and New Zealand. Rare in France, Italy, Poland, and 18 more places.
1 in 267 boys born in Northern Ireland in 2025. Number 77 there.
1 in 290, England and Wales
Say it JOSH-oo-uh
Rose and fell with Kai · As common as Kai
Common across the UK, Ontario, Ireland, and 6 more places. Rare in France, Italy, Poland, and 13 more places.
1 in 290 boys born in England and Wales in 2025. Number 53 there.
1 in 395, Ireland
Say it JAYK
Rose and fell with Kai
Common in the Netherlands, Quebec, and Ireland. Rare across France, the UK, Italy, and 16 more places.
1 in 395 boys born in Ireland in 2025. Number 95 there.
1 in 76, Ireland
Say it LEE-um
Rose and fell with Kai · Same generation as Kai
Loved across three Canadian provinces, the Netherlands, Sweden, and 7 more places. Common across France, the UK, Italy, and 17 more places.
1 in 76 boys born in Ireland in 2025. Number 7 there.
1 in 468, Scotland
Say it KON-er
Rose and fell with Kai
Common in Rostock. Rare across France, the UK, Italy, and 18 more places.
1 in 468 boys born in Scotland in 2025. Number 120 there.
1 in 753, England and Wales
Say it nuh-THAN-yul
Rose and fell with Kai
Common in Ontario. Rare across France, the UK, Italy, and 18 more places.
1 in 753 boys born in England and Wales in 2025. Number 149 there.
1 in 137, Scotland
Say it MAKS
Rose and fell with Kai · Latin, like Kai
Common across the UK, the Netherlands, three Nordic countries, and 17 more places. Rare in France, Italy, Poland, and 4 more places.
1 in 137 boys born in Scotland in 2025. Number 25 there.
1 in 130, Scotland
Say it al-ig-ZAN-der
Rose and fell with Kai
Common across the UK, Poland, the Netherlands, and 19 more places. Rare in France, Italy, Israel, and 3 more places.
1 in 130 boys born in Scotland in 2025. Number 22 there.
1 in 86, England and Wales
Say it AH-li-ver
Rose and fell with Kai · Same generation as Kai
Loved across England and Wales, three Canadian provinces, the Nordic countries, and 9 more places. Common in the Netherlands, Austria, Switzerland, and 8 more places. Rare in France, Italy, Poland, and 5 more places.
1 in 86 boys born in England and Wales in 2025. Number 6 there.
1 in 250, Ireland
Say it RY-un
Rose and fell with Kai · As common as Kai
Common across three Canadian provinces, Ireland, Northern Ireland, and 3 more places. Rare in France, England and Wales, Italy, and 16 more places.
1 in 250 boys born in Ireland in 2025. Number 57 there.
1 in 67, England and Wales
Say it NO-uh
Rose and fell with Kai · Same generation as Kai
Loved across France, the UK, Canada, and 19 more places. Common in Italy, Catalonia, and Spain. Rare in Poland, Israel, and Slovenia.
1 in 67 boys born in England and Wales in 2025. Number 2 there.
1 in 57, Norway
Say it EE-mul
Same generation as Kai · As common as Kai
Loved across five German cities and three Nordic countries. Common in Poland, Sweden, Austria, and 3 more places. Rare across France, the UK, Italy, and 8 more places.
1 in 57 boys born in Norway in 2025. Number 2 there.
How this list is scored
How this list is scored
Boy names that sit well beside Kai, ranked by the fit engine: names whose popularity moves with Kai's, from the same era, about as common and with shared origins. Rhymes, shared first letters and matching endings count against. Official birth statistics, not forum votes.
Each candidate scores at most about 52 points against the sibling: 22.5 when the two names' popularity curves moved together across regions and decades, up to 13.5 for a similar median birth year, up to 9 for similar popularity, and about 7 for a shared origin. A rhyme costs 27 points and a matching two-letter ending 4.5. Spellings of the sibling's own name and names on the same stem are never suggested. Only one spelling of each name is listed; the others are shown underneath.
Scores use official birth statistics from 40 regions and origins from Wiktionary. How these figures are computed.