Latin betula

← Gaulish *bitu (borrowed)

← Proto-Celtic *betwiyos (derived)

← Proto-Celtic *betuyā (mention)

← Proto-Celtic *betu (mention)

← Welsh bedwen (cognate)

← Proto-Indo-European *gʷetu-yo-s (derived)

← Proto-Indo-European *gʷetw-iyo-s (mention)

← Proto-Indo-European *gʷet- (mention)

← Latin bitūmen (cognate)

→ Italian betulla (inherited)

→ Latin betulus (mention)

→ Translingual Betula (derived)