Lewis & Short

Bauli, ōrum, m., = Βαῦλοι [acc. to the fable, from βοῦς and αὐλή, since here Hercules shut up the cattle taken from Geryon; v. Serv. ad Verg. A. 6, 107; 7, 662; Symm. Ep. 1, 1, both of whom understand the original form as Boaulia], a place near Baiœ, now Bacolo, Varr. R. R. 3, 17, 5; Cic. Ac. 2, 40, 125; 2, 3, 9; id. Fam. 8, 1, 4; Plin. 3, 5, 9, § 61; 9, 55, 81, § 172; Tac. A. 14, 4; Suet. Ner. 34; Mart. 4, 63.