The Kings of Connacht were rulers of the cóiced (variously translated as portion, fifth, province) of Connacht, which lies west of the River Shannon, Ireland. However, the name only became applied to it in the early medieval era, being named after the Connachta. The old name for the province was Cóiced Ol nEchmacht (the fifth of the Ol nEchmacht). Ptolemy's map of c. 150 AD does in fact list a people called the Nagnatae as living in the west of Ireland. Some are of the opinion that Ptolemy's Map of Ireland may be based on cartography carried out as much as five hundred years before his time. The Connachta were a group of dynasties who claimed descent from the three eldest sons of Eochaid Mugmedon: Brion, Ailill and Fiachrae. They took their collective name from their alleged descent from Conn Cétchathach. Their younger brother, Niall Noigiallach was ancestor to the Uí Néill. The following is a list of kings of Connacht from the fifth to fifteenth centuries. Pre-historic Kings of Ol nEchmacht Genann Conrac Cas Eochaid Feidlech Eochaidh Allat Tinni mac Conri Medb, Queen of Connacht Medb and Ailill mac Máta Maine Aithreamhail mac Ailill Máta Sanbh Sithcheann mac Ceat mac Magha Cairbre mac Maine Aithreamhail Eochaidh Fionn Aodh mac Cu Odhar Eochaidh mac Cairbre Aonghus Fionn mac Domhnall Cormac Ulfhada Aonghus Feirt mac Aonghus Fionn Connall Cruchain mac Aonghus Feirt Fearadach mac Connal Cruchain Forghus Fiansa Forghus Fiansa and Art mac Conn Ceidghin Cruchain mac Connall Cruchain Aodh mac Eochaidh Aodh Alainn mac Eochaidh Baicidh Nia Mór mac Lughna Lughaidh mac Lughna Fear Tri Aodh Caomh mac Garadh Glundubh Coinne mac Fear Tri Muireadh Tireach mac Fiachra Sraibrintne Eochaid Mugmedon Niall Noigiallach/Niall of the Nine Hostages, died c. 450/455 List of historical kings Uí Fiachrach, 406–482 Uí Briúin, 482–500 Uí Fiachrach, 500–549 Uí Briúin, 549–600 Uí Fiachrach Aidhne, 600–622 Uí Briúin, 622–649 Uí Fiachrach Aidhne, 649–663 Uí Briúin Seóla, 663–682 Uí Fiachrach Muaidhe, 682–683 Uí Fiachrach Aidhne, 683–696 Uí Briúin Síl Muiredaig, 696–702 Uí Briúin Síl Cellaig, 702–705 Uí Fiachrach Muaidhe, 705–707 Uí Briúin Síl Muiredaig, 707–723 Uí Briúin Síl Cellaig, 723–728 Uí Briúin Síl Cathail, 728–735 Uí Briúin Síl Muiredaig, 735–742 Uí Briúin Síl Cellaig, 742–756 Uí Fiachrach Muaidhe, 756–764 Uí Briúin Síl Cathail, 764–768 Uí Fiachrach Muaidhe, 768–773 Uí Briúin Síl Cellaig, 773–777 Uí Briúin Síl Cathail, 777–782 Uí Briúin Síl Muiredaig, 782–786 Uí Briúin Síl Cathail,