Flann Sinna
High King of Ireland
- Died
- 916
Flann mac Máel Sechnaill, better known as Flann Sinna, was the son of Máel Sechnaill mac Máele Ruanaid of Clann Cholmáin, the leading branch of the Southern Uí Néill. He was King of Mide from 877 onwards and a High King of Ireland. His mother Land ingen Dúngaile was a sister of Cerball mac Dúnlainge, King of Osraige.