Cyllenius

From Ancient Greek Κυλλήνιος (Kullḗnios), from Κυλλήνη (Kullḗnē), which in legend is described as the birthplace of the god.

• (Classical Latin) IPA^(key): [kylˈlɛ.ni.ʊs]
• (modern Italianate Ecclesiastical) IPA^(key): [t͡ʃilˈlɛː.ni.us]

Cyllēnius m sg (genitive Cyllēniī or Cyllēnī); second declension

1. (Roman mythology) An epithet of the god Mercury; Cyllenian
   • 29 BCE – 19 BCE, Virgil, Aeneid 4.252–253:

     hic primum paribus nitens Cyllenius alis
     constitit; [...]

     here first on even wings did shining Mercury stand

Second-declension noun, singular only.

¹Found in older Latin (until the Augustan Age).