Old Irish bile

← Proto-Celtic *belyos (inherited)

← Ancient Greek φύλλον (cognate)

← Proto-Indo-European *bʰleh₃- (root)

← Proto-Indo-European *bʰolyo- (inherited)

← Latin folium (cognate)

← Old Armenian բողբոջ (cognate)

→ English billiards (cognate)

→ English billet (cognate)

→ Irish bile (inherited)

→ Irish bileog (mention)

→ Manx billey (inherited)