←
Ancient Greek -ῐος (suffix)
←
Ancient Greek ποιός (mention)
←
Proto-Indo-European *kʷ- (root)
←
Proto-Indo-European *kʷis (derived)
→
Greek ποιος (inherited)
→
Galician cuxo (cognate)
→
Ancient Greek τίς (link)
→
Ancient Greek Κοῖος (mention)
→
Ancient Greek ποιός (mention)
→
Portuguese cujo (cognate)