Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

Sextĭlĭānus, i, m., a Roman surname, Mart. 1, 12, 2 and 4.

Sextĭlĭus, i, m.; Sextĭlĭa, ae, f., the name of a Roman gens: C. Sextilius Rufus, Cass. ap. Cic. Ep. Fam. 12, 13, 4; 13, 48 tit.: Sextilia, Suet. Vit. 3; Tac. H. 2, 64.
Hence, Sextĭlĭānus, a, um, adj., of or named from a Sextilius: pira, Cloat. ap. Macr. S. 2, 15 fin.