Where does “puolisisko” come from?
puolisisko (Finnish) comes from Finnish Sisko, from Finnish sisar, from Proto-Finnic sesar, from Proto-Balto-Slavic swésō, from Proto-Indo-European swésōr, from Proto-Indo-European su-h₁ésh₂-ōr, from Proto-Indo-European h₁ésh₂r̥ — blood.
puolisisko (Finnish): Synonym of siskopuoli
Ancestry of “puolisisko”, step by step