Where does “joulu-ukko” come from?

joulu-ukko (Finnish) comes from Finnish Ukko, from Finnish ukko, from Proto-Finnic ukko — old man.

Ancestry of “joulu-ukko”, step by step

joulu-ukko traces back through two separate lines of ancestry.

via Finnish Ukko

StepLanguageWordMeaning
1FinnishUkkosupreme god in Finnish mythology; Ukko's < Ukko,...
2Finnishukkoold man, gaffer; adult male wood grouse or black...
3Proto-Finnicukkoold man

via Finnish joulu

StepLanguageWordMeaning
1FinnishjouluChristmas; Abbreviation of joulukuu
Every word from Proto-Finnic ukkoEvery word from Finnish ukkoEvery word from Finnish Ukko