Saint Senan of Laraghbrine (Laithrech-Briuin in Irish), County Kildare, was an Irish Christian monk who lived towards the end of the 6th century. His father was Fintan, son of Strened, son of Glinder, son of Corc, son of Conned, son of Aengus, son of Fieg, son of Mail, son of Carthage of the race of Eochaidh, son of Muireadh. Senan's mother's name was Dediva (also called Editua or Dedi or Deidi or Deighe or Deidiu or Deaga or Mediva), daughter of Tren, son of Dubhthach moccu Lughair, who was Chief Ollam of Ireland and royal poet of King Lóegaire mac Néill.
Dediva's other children were St. Mainchín of Corann, son of Collan of Corann, Saint Diarmaid the Just, son of Lugna, Saint Caillin, son of Niata, Saint Felim of Kilmore, son of Carill, Saint Daigh of Inniskeen, son of Carill, Saint Femia daughter of Carill and Senchán Torpéist, another Chief Ollam of Ireland. Saint Senan was the oldest of Dediva's famous children.
He attended the Synod of Drumceat in 580 A.D. The Martyrology of Donegal gives his feastday as 2 September.