Where does “Seppala” come from?

Seppala (English) comes from Finnish Seppälä, from Finnish -lä, from Finnish -as, from Proto-Finnic -s, from Proto-Finno-Ugric -s.

Ancestry of “Seppala”, step by step

StepLanguageWordMeaning
1FinnishSeppäläAny of a number of small places in Finland
2Finnish-läFront vowel variant of -la
3Finnish-asForms some adjectives; Forms some nouns
4Proto-Finnic-sForms nouns
5Proto-Finno-Ugric-s—
Every word from Proto-Finno-Ugric -s →Every word from Finnish -lä →Every word from Finnish -as →