Coincidentally, Nessán was among the saints who shared Patrick's day of 17 March, ostensibly in his guise as a Cork saint. There are several pointers to the ultimate identity of the two saints Nessán, of Mungret and Cork. The Limerick saint's main feast-day of 25 July was shared by Findbarr (qv) of Cork, a coincidence used by the author of the shorter version of the ‘Vision of Mac Conglinne’ to set the scene for the arrival of his resourceful scholar-hero in Cork ‘on the feast of Bairre and Nessán’ (Meyer, Aislinge, 114). Two early ninth-century litanies likewise invoked the two saints together (Plummer, Irish litanies, 54–5; Stowe Missal, i, 14). Indeed, there are grounds for believing that the Mungret and Cork cults originated, like that of Findbarr, in Ulster – whence the appellation Ulad, ‘of the Ulstermen’, sometimes attached to Nessán (Mart. Oeng., 249) – before travelling together to Munster. An Ulster background would also suit Nessán's name, which corresponds to that borne by the mother of Conchobar (qv) son of Ness.