Sengann ("old-mean") is the name of two early settlers of Ireland according to Irish mythology.
1. Sengann was the name of a king of the Fomorians who was defeated, along with his brother Gann (1), by Nemed.
2. Sengann son of Dela of the Fir Bolg was a High King of Ireland. He succeeded his brothers Gann (2) and Genann when they died of plague, and ruled for five years until he was overthrown by Fiacha Cennfinnán, grandson of Rudraige (2).
See also
Lebor Gabála Érenn
