Fergus

Ancient Surnames—— | Brefne | Fermanagh | Tirowen |

Surnames —— |[Connacht-F] | [Connacht-V] | [Munster-F] | [Ulster-F] |

Septs and Clans —— | [F] | [MacF] | [MacK] |

Leinster Tribes —— |  Sil Maeluidir | Fergusa |

Munster Tribes —— | Fergusa | Fothaírt |

Chief Irish Families- Munster —— | The Dalcassians | The Eugenian / Ciannachta |

Ulster Tribes / Tribes of Uladh — |  Cuailgne | Dal Fiatach | Dal n Araidhe | Dal Riata | Eathach Cobha |

Ancient Kings - Connacht | Monarchs of Ireland |