What does Thrēicius mean in Latin?

Thrēicius, a adjective, means “Thracian”.

How do you pronounce Thrēicius?

In classical Latin, [tʰreːˈɪ.ki.ʊs]; in ecclesiastical (church) Latin, [treˈiː.t͡ʃi.us].

adjectivefirst/second-declension adjective

Thrēicius (feminine Thrēicia, neuter Thrēicium)

Classical[tʰreːˈɪ.ki.ʊs]Ecclesiastical[treˈiː.t͡ʃi.us]

singular
form	masculine	feminine	neuter
nominative	Thrēicius	Thrēicia	Thrēicium
genitive	Thrēiciī	Thrēiciae	Thrēiciī
dative	Thrēiciō	Thrēiciae	Thrēiciō
accusative	Thrēicium	Thrēiciam	Thrēicium
ablative	Thrēiciō	Thrēiciā	Thrēiciō
vocative	Thrēicie	Thrēicia	Thrēicium

plural
form	masculine	feminine	neuter
nominative	Thrēiciī	Thrēiciae	Thrēicia
genitive	Thrēiciōrum	Thrēiciārum	Thrēiciōrum
dative	Thrēiciīs	Thrēiciīs	Thrēiciīs
accusative	Thrēiciōs	Thrēiciās	Thrēicia
ablative	Thrēiciīs	Thrēiciīs	Thrēiciīs
vocative	Thrēiciī	Thrēiciae	Thrēicia

Thrēĭcĭus, a, um, v. Thracia, D.