Where does “pihlajisto” come from?

pihlajisto (Finnish) comes from Finnish pihlaja, from Proto-Finnic pihlaga, from Proto-Finno-Ugric pićlä.

Ancestry of “pihlajisto”, step by step

StepLanguageWordMeaning
1Finnishpihlajarowan, mountain ash, "Sorbus aucuparia"; Any tree...
2Proto-Finnicpihlagarowan
3Proto-Finno-Ugricpićlä—
Every word from Proto-Finno-Ugric pićlä →Every word from Proto-Finnic pihlaga →Every word from Finnish pihlaja →