Kaj
Only 307 people in Poland carry it. It's almost always a man's name.
Kaj Pronunciation
Kaj is pronounced KAHY (/kaj/).
How many people are named Kaj
1 in 70218 men in Poland is named Kaj. 307 people carry it in the 2025 register: rank #1727 among male names.
Kaj's popularity over time
4 boys were given the name in 2025, ranking #1074 among newborns. It is making a comeback after a low in 2003.
Where Kaj is most popular
Kaj is most popular in Masovian, 230% above the national average (26 boys born 2019–2025), followed by West Pomeranian (+113%) and Lower Silesian (+72%). It is least common in Łódź, 29% below average.
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Masovian26 boys born+230%
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West Pomeranian4 boys born+113%
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Lower Silesian6 boys born+72%
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Podlaskie2 boys born+37%
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Warmian-Masurian2 boys born+25%
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Greater Poland6 boys born+25%
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Łódź2 boys born−29%
Kaj as a middle name
Kaj is a first name for 307 men in Poland and a middle name for another 76, an 80/20 split. In the men's middle-name ranking it sits 819th, between Gregorio (76) and Kalikst (76).
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817
76Erhard
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818
76Gregorio
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81976Kaj
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820
76Kalikst
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821
76Osman