| Honorific Prefix: | Saint |
| Nem Moccu Birn | |
| Birth Place: | Ireland |
| Death Date: | 7th century |
| Death Place: | Aran Islands |
| Canonized Date: | Pre-congregation |
| Feast Day: | 14 June |
Nem Moccu Birn (or Nennus, Nenus, Nehemias; died 14 June 654) was Abbot of Aran.[1] His feast day is 14 June.
Nem was one of the few known successors of Enda of Aran, and appears to be the first such abbot listed in the Irish annals after Enda himself.
The word moccu is actually a contracted form of "mac Ua Birn", indicating that St. Nem was a descendant of Loegaire Birn Buadach, and early king of Ossory and thus a scion of the Dál Birn lineage of Ossory. In the Félire Óengusso, he is recorded as being a relation of St. Ciarán of Saigir.[2]
From the Annals of the Four Masters:
From the Félire Óengusso ("The Martyrology of Óengus"):
Nem great-grandson of Bern. He was called by three names, to wit, Nem and Pupu and Cáilbe. Nem primum nomen etc. Whence Senan of Inis Cathaig sang Abbas almus amabilis etc.
A successor of Peter and Paul, Cailbe came from the east from Rome, Nem, great-grandson of Bern, a bright brother, whose name is Pupu of Aran."
The monks of St Augustine's Abbey, Ramsgate wrote in their Book of Saints (1921),
The hagiographer Alban Butler (1710–1773) wrote in his Lives of the Fathers, Martyrs, and Other Principal Saints under June 14,