Where does “duonfilo” come from?
duonfilo (Esperanto) comes from Esperanto filo, from Latin fīlius, from Old Latin fīlios, from Proto-Indo-European dʰeh₁y-li-os, from Proto-Indo-European dʰeh₁(y)- — to suckle, nurse.
duonfilo (Esperanto): stepson
Ancestry of “duonfilo”, step by step
Words derived from “duonfilo”