Where does “Galitsia” come from?

Galitsia (Finnish) comes from Medieval Latin Gallicia, from Latin Gallaecia, from Latin Gallaeci, from Proto-Celtic kallī, from Proto-Indo-European kelh₂- — to beat; to break.

Ancestry of “Galitsia”, step by step

Step	Language	Word	Meaning
1	Medieval Latin	Gallicia	—
2	Latin	Gallaecia	—
3	Latin	Gallaeci	a tribe in the region; a Celtic tribe in the...
4	Proto-Celtic	kallī	grove, forest
5	Proto-Indo-European	kelh₂-	to beat; to break

Every word from Proto-Indo-European kelh₂- →Every word from Proto-Celtic kallī →Every word from Latin Gallaeci →