Cruimthear Mac Carthaigh (the presbyter

Presbyter

Presbyter in the New Testament refers to a leader in local Christian congregations, then a synonym of episkopos...

 Mac Carrthaigh), fl. c. 550

550

Year 550 was a common year starting on Saturday of the Julian calendar. The denomination 550 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.- Byzantine Empire :* January 16 – Gothic War :...

.

In the genealogies, Mac Carthaigh - his forename, not his surname - is stated as been a native of Conmaícne Cúl Toland in what is now along the County Galway

County Galway

County Galway is a county in Ireland. It is located in the West Region and is also part of the province of Connacht. It is named after the city of Galway. Galway County Council is the local authority for the county. There are several strongly Irish-speaking areas in the west of the county...

 - County Mayo

County Mayo

County Mayo is a county in Ireland. It is located in the West Region and is also part of the province of Connacht. It is named after the village of Mayo, which is now generally known as Mayo Abbey. Mayo County Council is the local authority for the county. The population of the county is 130,552...

. Thus he was from the same tribal group of Jarlath

Jarlath

Saint Iarlaithe mac Loga, also known as Jarlath , was an Irish priest and scholar from Connacht, remembered as the founder of the monastic School of Tuam and patron saint of the Archdiocese of Tuam...

 of Tuam

Tuam

Tuam is a town in County Galway, Ireland. The name is pronounced choo-um . It is situated west of the midlands of Ireland, and north of Galway city.-History:...

. This branch of the Conmaicne

Conmaicne

The Conmhaicne or Conmaicne were an ancient tribal grouping that were divided into a number of distinct branches that were found scattered around Ireland in the early medieval period. They settled in Connacht, where they gave their name to several territories....

 were said to converge, or descend, from Cumhscraidh mac Céacht

Cumhscraidh mac Céacht

Cumhscraidh mac Céacht, was according to medieval Irish legend and historical tradition, Irish King.Cumhscraidh was a ten-time great-grandson of Lugaid mac Con. According to the genealogies, The Conmaicne of Cúl converge around Cumhscraidh. This would make him the ancestor of the Conmaícne Cúl...

, who in turn was a descendant of Lugaid mac Con

Lugaid mac Con

Lugaid Mac Con, often known simply as Mac Con, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He belonged to the Corcu Loígde, and thus to the Dáirine. His father was Macnia mac Lugdach, and his mother was Sadb ingen Chuinn, daughter of the former High...

. It is unclear which church he was attached to.