Where does “figliastro” come from?
figliastro (Italian) comes from Latin filiastrum, from Latin fīlius, from Old Latin fīlios, from Proto-Indo-European dʰeh₁y-li-os, from Proto-Indo-European dʰeh₁(y)- — to suckle, nurse.
figliastro (Italian): stepchild; stepson
Ancestry of “figliastro”, step by step