Syrius
Could not find Syrii in Logeion dictionaries.
Syrii Proper-name adjective: masculine vocative plural, Proper-name adjective: neuter genitive singular, Proper-name adjective: masculine nominative plural, Proper-name adjective: masculine genitive singular of Syrius
Sȳrĭus, a, um, v. Syria, A.
Sȳrĭus, a, um, v. Syros.
1. Syrius, a, um, s. Syrī.
2. Sȳrius, a, um, s. Sȳros.
1 Sўrĭus, v. Syria.
2 Sўrĭus, a, um (Σύριος), de Syros : Cic. Tusc. 1, 38 ; Plin. 33, 158.