(Τροφώνιος), a son of Erginus, king of Orchomenus, or of Apollo. He with his brother Agamedes built the temple at Delphi and the treasury of king Hyrieus in Boeotia. (Hom. Hymn. in Apoll. 296 ; Paus. 9.37 and 39; Strab. ix. p.421.) After his death he was worshipped as a hero, and had a celebrated oraele in cave near Lebadeia in Boeotia. ( Hdt. 1.46; Strab. ix. p.414; Eurip. Ion, 300 ; Aristoph. Nab. 502 ; comp. Dict. of Antiq. s. v. Oraculum.)