Lewis & Short

Croesus, i, m., = Κροῖσος,

  1. I. a king of Lydia, celebrated for his riches, Cic. Div. 1, 19, 37; id. Fin. 2, 27, 87; Hor. Ep. 1, 11, 2; Just. 1, 7, 2 sqq.; Prop. 2 (3), 26, 23 al.
    Appel. for a rich man, in contrast with Irus, Ov. Tr. 3, 7, 42; and in plur., Mart. 11, 6, 4.
    Hence,
  2. II. Croesĭus, a, um, adj., of Crœsus: opes, Mart. Cap. 6, § 578.