Italian betulla

← Catalan bedoll (cognate)

← Gaulish *betua (derived)

← Proto-Celtic *betwiyos (derived)

← Proto-Celtic *betuyā (mention)

← Spanish abedul (cognate)

← French bouleau (cognate)

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

← Latin *betūlus (mention)

← Latin betula (inherited)

← Portuguese bétula (cognate)

→ Spanish abedul (cognate)

→ French bouleau (cognate)

→ Old French boul (cognate)

→ Portuguese bétula (cognate)