I like the sound of
Kevin better... and it means lovable... though I don't have it on my preferred names list
other boy k names...
KyleKristopherKodyKoryKalebKurtKurtis
... Most of the acceptable boys' K names I can find are either Jpns. or more often spelled with a C. However, if you want some Jpns. K names to look at, I can give you LOTS of 'em...
Kazuki, Katsunori, Kyohei (y doesn't act like a vowel in Jpns., so that's 2 syllables w/ the first being kyo and the second being hay), Kohei (ko-hei), Kazunobu, Katsunobu, Kuniaki, Keisuke (kay-skay),
Kenta, etc.