Luka is Russian, Croatian, Serbian etc. And it is just another spelling of
Luca. Have you never watched the popular TV series "E.R."? There is a male doctor
Luka there (from Croatia I think).
Luca/Luka is variant of the biblical Luke/Lucas/Lukas.
"But it’s all right now.
I learned my lesson well.
You see you can’t please everyone
So you got to please yourself."
Rick Nelson,
Garden Party
"It does not become me to make myself smaller than I am." (
Edith Södergran 1891-1923)