Threicius
Could not find Threicii in Logeion dictionaries.
Threicii 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 Threicius
Thrēĭcĭus, a, um, v. Thracia, D.
Thrēicius, -issa, s. Thrāces.
Thrēĭcĭus, (11) a, um (Θρηΐκιος), de Thrace : Virg. En. 6, 645 ; Hor. O. 1, 24, 13 ; Ov. M. 11, 2.