Sengann son of Dela, of the Fir Bolg

Fir Bolg

In Irish mythology the Fir Bolg were one of the races that inhabited the island of Ireland prior to the arrival of the Tuatha Dé Danann.-Mythology:...

, was a legendary High King of Ireland

High King of Ireland

The High Kings of Ireland were sometimes historical and sometimes legendary figures who had, or who are claimed to have had, lordship over the whole of Ireland. Medieval and early modern Irish literature portrays an almost unbroken sequence of High Kings, ruling from Tara over a hierarchy of...

, succeeding his brothers Gann

Gann mac Dela

Gann, son of Dela, of the Fir Bolg was a legendary joint High King of Ireland with his brother Genann, succeeding their brother Rudraige. His wife was Etar.When the Fir Bolg invaded Ireland the five sons of Dela divided the island amongst themselves...

 and Genann

Genann

Genann , son of Dela , of the Fir Bolg was a legendary joint High King of Ireland with his brother Gann, succeeding their brother Rudraige. His wife was Cnucha....

. His wife was Anust.

When the Fir Bolg invaded Ireland the five sons of Dela divided the island amongst themselves. Sengann landed with Gann at Inber Dubglaise

Cork Harbour

Cork Harbour is a natural harbour and river estuary at the mouth of the River Lee in County Cork, Ireland. It is one of several which lay claim to the title of "second largest natural harbour in the world by navigational area" . Other contenders include Halifax Harbour in Canada, and Poole Harbour...

 and the pair divided Munster

Munster

Munster is one of the Provinces of Ireland situated in the south of Ireland. In Ancient Ireland, it was one of the fifths ruled by a "king of over-kings" . Following the Norman invasion of Ireland, the ancient kingdoms were shired into a number of counties for administrative and judicial purposes...

 between them, Sengann taking the south and Gann the north of the province.

After death of Gann and Genann of plague, Sengann ruled Ireland for five years, before he was killed by Fiacha Cennfinnán

Fiacha Cennfinnán

In Irish mythology Fiacha Cennfinnán , son of Starn, son of Rudraige, of the Fir Bolg, became High King of Ireland when he overthrew his great-uncle Sengann....

, his brother Rudraige

Rudraige mac Dela

Rudraige , son of Dela, of the Fir Bolg was the legendary second High King of Ireland, succeeding his brother Sláine....

's grandson.