←
Old English Bōla (cognate)
←
Old English Bōlla (mention)
←
Middle Dutch boel (derived)
←
Middle Dutch boele (mention)
←
Proto-Germanic *bōlô (derived)
←
Proto-Germanic *bō- (mention)
←
Middle High German buole (cognate)
←
Middle Low German bôle (cognate)
→
English billy (mention)