''InI earlyluathzlitríocht Irishna literaturehÉireann, thebhí Fircónaí Domnannar werena locatedFir inDomnann ''i g[[Laighin|CóiceCúige LaigeanLaighean]]''. AI 7th-centuryngan Irishden poem7ú creditshaois, theirdeirtear rulergo raibh a thaoiseach, ''Mess-Telmann'', withina therí overkingshipruireach ofna thecúige province'' and with wielding power from the royal site of Leinster at [[Dún Áilinne]].
''The place-name InberInbhear DomnannDomhnann, now [[Mullach Íde]] Bay inlet in north [[Contae Bhaile Átha Cliath]], preserves the tribal name. But the area with the strongest place-name associations with the Fir Domnann is in north-west Mayo: the Iorrais Domnann, from which the modern barony of [[Iorras]] takes its name, and nearby Magh Domnann and Dún Domnann.<ref>J.T. Koch, ''Celtic Culture: a historical encyclopedia'' (2006), lch. 750.</ref>
