The Cálraighe were a population-group found mostly in northern Connacht as well as County Westmeath and County Longford. They were purported descendants of Lugaid Cal, son of Daire Sirchrechtaig, who was himself a supposed descendant of Lugaid mac Itha, a first cousin of Míl Espáine.
Daire is stated as having five sons, all called Lugaid, from who each derived the Corcu Loígde, Corco Oirce, Loigis Laigin, Dal Mesen Corb and the Calraige.
Around a dozen branches of the Calraige are listed as inhabitants of northern Connacht. They include:
Cálraighe Tre Maige of Druim Leas – now Drumlease parish, County LeitrimCálraighe Aelmag – Snedriagail, abbot of Clonmacnoise (died 781), was of this branchCálraighe Locha Gile – possibly an alternative name for the previousCálraighe Droma Cliab – an alternative name for the Cálraighe Locha GileCálraighe Laithim – location uncertain, possibly near that of Droma Cliab (Drumcliffe, County Sligo)Cálraighe Mor – a tuath aithech located with the Lúighne in mid-SligoCálraighe in Chorainn – aka Cálraighe Morna, found in Corann, SligoCálraighe Luirg – located south-east of the previous, in Moylurg, County RoscommonCálraighe Culi Cernadan – located in Attymass and Kilgarvan parishes, County MayoCálraighe Mag nEileag – situated on the north-west corner of Lough Conn, County MayoCálraighe Mag Muirisc – at the mouth of the river Moyan unattested branch at Glencalry, Doonfeeny, County Mayoanother unattested branch at Knock, County Mayo, anciently called Cnoc Droma ChalraigheCálraighe found outside Connacht included the following:
Cálraighe Bri Leith – found in County LongfordCálraighe in Chalaid – in the parish of Ballyloughloe, County WestmeathCálraighe Bregmuine – barony of Brawny, County WestmeathCálraighe Tethba – somewhere in County Longford