What does Tiberēius mean in Latin?

Tiberēius, a adjective, means “of Tiberius”.

How do you pronounce Tiberēius?

In classical Latin, [tɪ.bɛˈreː.jʊs]; in ecclesiastical (church) Latin, [ti.beˈrɛː.jus].

adjectivefirst/second-declension adjective

Tiberēius (feminine Tiberēia, neuter Tiberēium)

Classical[tɪ.bɛˈreː.jʊs]Ecclesiastical[ti.beˈrɛː.jus]

singular
form	masculine	feminine	neuter
nominative	Tiberēius	Tiberēia	Tiberēium
genitive	Tiberēiī	Tiberēiae	Tiberēiī
dative	Tiberēiō	Tiberēiae	Tiberēiō
accusative	Tiberēium	Tiberēiam	Tiberēium
ablative	Tiberēiō	Tiberēiā	Tiberēiō
vocative	Tiberēie	Tiberēia	Tiberēium

plural
form	masculine	feminine	neuter
nominative	Tiberēiī	Tiberēiae	Tiberēia
genitive	Tiberēiōrum	Tiberēiārum	Tiberēiōrum
dative	Tiberēiīs	Tiberēiīs	Tiberēiīs
accusative	Tiberēiōs	Tiberēiās	Tiberēia
ablative	Tiberēiīs	Tiberēiīs	Tiberēiīs
vocative	Tiberēiī	Tiberēiae	Tiberēia

Tĭbĕrēĭus, a, um, v. Tiberius, II. 3.

From Tiberius + -ēius.