What does Petraeus mean in Latin?

Petraeus, a adjective, means “Petran; of or relating to Petra”.

How do you pronounce Petraeus?

In classical Latin, [pɛˈtrae̯.ʊs]; in ecclesiastical (church) Latin, [peˈtrɛː.us].

adjectivefirst/second-declension adjective

Petraeus (feminine Petraea, neuter Petraeum)

Classical[pɛˈtrae̯.ʊs]Ecclesiastical[peˈtrɛː.us]

singular
form	masculine	feminine	neuter
nominative	Petraeus	Petraea	Petraeum
genitive	Petraeī	Petraeae	Petraeī
dative	Petraeō	Petraeae	Petraeō
accusative	Petraeum	Petraeam	Petraeum
ablative	Petraeō	Petraeā	Petraeō
vocative	Petraee	Petraea	Petraeum

plural
form	masculine	feminine	neuter
nominative	Petraeī	Petraeae	Petraea
genitive	Petraeōrum	Petraeārum	Petraeōrum
dative	Petraeīs	Petraeīs	Petraeīs
accusative	Petraeōs	Petraeās	Petraea
ablative	Petraeīs	Petraeīs	Petraeīs
vocative	Petraeī	Petraeae	Petraea

petraeus, a, um, adj., = πετραῖος,

I. that grows among rocks, rock- (post-Aug.) brassica, Plin. 20, 9, 36, § 92.

Borrowed from Ancient Greek Πετραίος (Petraíos).

adjectivefirst/second-declension adjective

petraeus²

petraeus (feminine petraea, neuter petraeum)

Classical[pɛˈtrae̯.ʊs]Ecclesiastical[peˈtrɛː.us]

singular
form	masculine	feminine	neuter
nominative	petraeus	petraea	petraeum
genitive	petraeī	petraeae	petraeī
dative	petraeō	petraeae	petraeō
accusative	petraeum	petraeam	petraeum
ablative	petraeō	petraeā	petraeō
vocative	petraee	petraea	petraeum

plural
form	masculine	feminine	neuter
nominative	petraeī	petraeae	petraea
genitive	petraeōrum	petraeārum	petraeōrum
dative	petraeīs	petraeīs	petraeīs
accusative	petraeōs	petraeās	petraea
ablative	petraeīs	petraeīs	petraeīs
vocative	petraeī	petraeae	petraea

Pĕtraeus, a, um, v. 2. Petra, I. B.

Borrowed from Ancient Greek πετραῖος (petraîos).