Corpus of Electronic Texts Edition
The Wooing of Emer by Cú Chulainn (Author: [unknown])

paragraph 43

‘The King of Ana, I said, and his Servant (gnia), i.e., Cerna through which we passed. Sid Cirine was its name of old. Cerna is its name since the
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viz., Enna Aignech, slew Cerna, the king of Ana on that hill, and he slew his steward in the east of that place. Gnia was his name, from which is Rath Gniad in Cerna ever. On Gese, the king of the sons of Emne, did Enna do it, for there was great friendship between Gese and Cerna.’