Where does “Solja” come from?

Solja (Finnish) comes from Finnish sotia, from Finnish sota, from Proto-Finnic sota, from Proto-Uralic śoďa — war.

Ancestry of “Solja”, step by step

StepLanguageWordMeaning
1Finnishsotiato be at war, to fight in a war; to campaign;...
2Finnishsotawar; warfare; military, war-
3Proto-Finnicsotawar, conflict
4Proto-Uralicśoďawar
Every word from Proto-Uralic śoďaEvery word from Proto-Finnic sotaEvery word from Finnish sota