What does Iālysius mean in Latin?

Iālysius, a adjective, means “of Ialysus”.

How do you pronounce Iālysius?

In classical Latin, [i.aːˈly.si.ʊs]; in ecclesiastical (church) Latin, [i.aˈliː.s̬i.us].

adjectivefirst/second-declension adjective

Iālysius (feminine Iālysia, neuter Iālysium)

Classical[i.aːˈly.si.ʊs]Ecclesiastical[i.aˈliː.s̬i.us]

singular
form	masculine	feminine	neuter
nominative	Iālysius	Iālysia	Iālysium
genitive	Iālysiī	Iālysiae	Iālysiī
dative	Iālysiō	Iālysiae	Iālysiō
accusative	Iālysium	Iālysiam	Iālysium
ablative	Iālysiō	Iālysiā	Iālysiō
vocative	Iālysie	Iālysia	Iālysium

plural
form	masculine	feminine	neuter
nominative	Iālysiī	Iālysiae	Iālysia
genitive	Iālysiōrum	Iālysiārum	Iālysiōrum
dative	Iālysiīs	Iālysiīs	Iālysiīs
accusative	Iālysiōs	Iālysiās	Iālysia
ablative	Iālysiīs	Iālysiīs	Iālysiīs
vocative	Iālysiī	Iālysiae	Iālysia

From Iālysus + -ius.