What does Cȳrēnaeus mean in Latin?

Cȳrēnaeus, a noun, means “Cyrenaean, Cyrenean, Cyrenian (native or inhabitant of Cyrene, Libya) (usually male)”.

What is the genitive of Cȳrēnaeus?

The genitive singular is Cȳrēnaeī. Cȳrēnaeus is masculine, second declension.

In classical Latin, [kyː.reːˈnae̯.ʊs]; in ecclesiastical (church) Latin, [t͡ʃi.reˈnɛː.us].

noun · masculinesecond declension

Cȳrēnaeus m sg (genitive Cȳrēnaeī, feminine Cȳrēnaea)

Classical[kyː.reːˈnae̯.ʊs]Ecclesiastical[t͡ʃi.reˈnɛː.us]

Cyrenaean, Cyrenean, Cyrenian (native or inhabitant of Cyrene, Libya) (usually male)

Borrowed from Ancient Greek Κυρηναῖος (Kurēnaîos), from Κυρήνη (Kurḗnē) + -αῖος (-aîos). By surface analysis, Cȳrēn(ē) + -aeus.

Descendants

adjectivefirst/second-declension adjective

Cȳrēnaeus²

Cȳrēnaeus (feminine Cȳrēnaea, neuter Cȳrēnaeum)

Classical[kyː.reːˈnae̯.ʊs]Ecclesiastical[t͡ʃi.reˈnɛː.us]

singular
form	masculine	feminine	neuter
nominative	Cȳrēnaeus Cȳrēneus	Cȳrēnaea Cȳrēnea	Cȳrēnaeum Cȳrēneum
genitive	Cȳrēnaeī Cȳrēneī	Cȳrēnaeae Cȳrēneae	Cȳrēnaeī Cȳrēneī
dative	Cȳrēnaeō Cȳrēneō	Cȳrēnaeae Cȳrēneae	Cȳrēnaeō Cȳrēneō
accusative	Cȳrēnaeum Cȳrēneum	Cȳrēnaeam Cȳrēneam	Cȳrēnaeum Cȳrēneum
ablative	Cȳrēnaeō Cȳrēneō	Cȳrēnaeā Cȳrēneā	Cȳrēnaeō Cȳrēneō
vocative	Cȳrēnaee Cȳrēnee	Cȳrēnaea Cȳrēnea	Cȳrēnaeum Cȳrēneum

plural
form	masculine	feminine	neuter
nominative	Cȳrēnaeī Cȳrēneī	Cȳrēnaeae Cȳrēneae	Cȳrēnaea Cȳrēnea
genitive	Cȳrēnaeōrum Cȳrēneōrum	Cȳrēnaeārum Cȳrēneārum	Cȳrēnaeōrum Cȳrēneōrum
dative	Cȳrēnaeīs Cȳrēneīs	Cȳrēnaeīs Cȳrēneīs	Cȳrēnaeīs Cȳrēneīs
accusative	Cȳrēnaeōs Cȳrēneōs	Cȳrēnaeās Cȳrēneās	Cȳrēnaea Cȳrēnea
ablative	Cȳrēnaeīs Cȳrēneīs	Cȳrēnaeīs Cȳrēneīs	Cȳrēnaeīs Cȳrēneīs
vocative	Cȳrēnaeī Cȳrēneī	Cȳrēnaeae Cȳrēneae	Cȳrēnaea Cȳrēnea

Borrowed from Ancient Greek Κυρηναῖος (Kurēnaîos), from Κυρήνη (Kurḗnē) + -αῖος (-aîos). By surface analysis, Cȳrēn(ē) + -aeus.