Spanish boina

← Spanish bonete (mention)

← Basque txapel (mention)

← Proto-Germanic *bi (derived)

← Proto-Germanic *bundiją (mention)

← Proto-West Germanic *ob- (mention)

← Proto-West Germanic *bunni (mention)

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

→ Spanish bonete (mention)

→ Portuguese boina (borrowed)