Tools / Baby names / K
Kaj
BoyMeaning of Kaj: Latin: 'rejoice'
Kaj is a boy's name most strongly associated with Swedish naming. It has 3 letters and 1 syllable, and it is a genuinely rare and unique choice — 11853rd most popular boys' name in the United States in 2025.
US rank 2025
#11853
5 babies in 2025
England & Wales 2024
—
Fewer than 3 babies or unlisted
US babies since 1880
515
First recorded 1956 · peak 2009
Trend
stable
Style: rare
Popularity over time
Gender split
100% boys · 0% girls, based on US, UK and international usage.
Origins & cultures
More Swedish boys' names
Swedish · 1 syllable
US #831UK #800
Swedish · 2 syllables
US #987UK #2263
Swedish · 3 syllables
US #637UK #2921
Swedish · 2 syllables
US #1237UK #1595
Swedish · 2 syllables
US #3070UK #1517
Swedish · 2 syllables
US #1119UK #4270
Swedish · 1 syllable
US #3533UK #4270
Swedish · 1 syllable
US #4788UK #4270
Swedish · 2 syllables
US #1837UK #5119
Swedish · 2 syllables
US #5236UK #3254
Swedish · 2 syllables
US #4428UK #2263
Swedish · 2 syllables
US #7560UK #4270
Other names starting with K
Hawaiian · 1 syllable
US #86UK #72
Irish · 2 syllables
US #228UK #264
Scottish · 2 syllables
US #307UK #968
American · 2 syllables
US #138UK #250
Arabic & Persian · 2 syllables
US #395UK #283
Hebrew · 2 syllables
US #310UK #308
Scottish · 2 syllables
US #512UK #651
American · 2 syllables
US #248UK #396
Irish · 2 syllables
US #394UK #664
American · 2 syllables
US #231UK #230
Irish · 1 syllable
US #409UK #204
Hawaiian · 1 syllable
US #254UK #206