Where does “halvsøster” come from?
halvsøster (Danish) comes from Danish søster, from Old Danish systær, from Old Norse systir, from Proto-Norse ᛊᚹᛖᛊᛏᚨᚱ, from Proto-Germanic swestēr, from Proto-Indo-European swésōr, from Proto-Indo-European su-h₁ésh₂-ōr, from Proto-Indo-European h₁ésh₂r̥ — blood.
halvsøster (Danish): a half sister
Ancestry of “halvsøster”, step by step