| Forbes Mac Fhirbhisigh | |
|---|---|
| Parent house | Ui Fiachrach |
| Country | Kingdom of Connacht |
| Founder | Fearbiseach mac Domhnall Óg |
| Titles |
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MacFirbis (Irish: Mac Fhirbhisigh), also known as Forbes, was the surname of a family of Irish hereditary historians based for much of their known history at Lecan, Tireragh (now Lackan, Kilglass parish, County Sligo). They claimed descent from Dathí (d.418?/428?), said to be one of the last pagan Kings of Connacht, and were thus one of the many families who sprang from the Uí Fiachrach dynasty. The progenitors of the MacFirbis family descend from Amhailgadh, whose brothers included Fiachra Ealg (ancestor of O'Dowd) and Eocha Breac (ancestor of O'Shaughnessy).