Lewis & Short

Stāiēnus, i, m., a Roman surname, e. g. C. Aelius Paetus Staienus, a judge, Cic. Clu. 20, 55; 24, 64; cf. as a proverb of bad oratory: Staieni et Autronii, id. Brut. 69, 244; 72, 251.