French bouleau

← Catalan bedoll (cognate)

← Spanish abedul (cognate)

← French -eau (mention)

← Old French boul (inherited)

← Old French bououl (mention)

← Galician bídalo (cognate)

← Galician bidueiro (mention)

← Italian betulla (cognate)

← Portuguese bétula (cognate)

→ Aragonese abetullo (cognate)

→ Spanish abedul (cognate)

→ French boulaie (suffix)

→ Galician bídalo (cognate)

→ Italian betulla (cognate)

→ Portuguese bétula (cognate)

→ Vietnamese bu-lô (borrowed)