Erca ingen Loarn
| Erc ingen Loarn | |
|---|---|
| Born | c. mid 5th century Scotland |
| Died | c. 6th century England |
| Spouses |
|
| Issue | Muirchertach mac Ercae |
Erc ingen Loarn (sometimes Latinized as Erca to distinguish her from her grandfather Eirc mac Eochaid) was a queen consort of Ailech, best known as the eponymic mother of Muirchertach mac Ercae, a High King of Ireland. She is described by Thomas Charles-Edwards as having been "obviously legendary", in part due to a mention of her in the Banshenchas.