Helpful Links

A collection of Genealogical and McManus related websites

• Ancestry McManus Page
• Family Tree DNA
• Dal Cuinn Teóra Connachta and the Uí Néill Project
• Wikipedia - McManus
• Surname Distribution Map
• Family Crest
• Family Search
• Leitrim - Roscommon
• John Grenham
• 23andMe
• FindmyPast
• Ireland101
• WikiTree
• YNDA Project

National Library of Ireland Home Page

This NLI’s collection of Catholic parish register microfilms. The registers contain records of baptisms and marriages from the majority of Catholic parishes in Ireland and Northern Ireland up to 1880.

• NIL - Catalogue
• NIL - NewsPapers
• NIL - Sources Database
• NIL - Manuscript Collection Lists
• NIL - The Poole Collection
• NIL - The Clonbrock Collection

Ireland Links

• Ulster
• Clonalis_House
• Lough_Erne
• Cathal Óg Mac Maghnusa
• Annals_of_Ulster
• Ballyfarnon
• Maghnus_Ua_Conchobair
• Tairrdelbach_Ua_Conchobair
• Conchubhair_Donn
• Leitrim-Roscommon Genealogy Bulletin Board
• Leitrim-Roscommon Genealogy

McManus is an Irish surname. It is derived from the Irish Gaelic “Mac Mághnais”, in modern Irish “McMaghnuis” which means “Son of Magnus”. Its earlier origin is from the Latin “magnus”, meaning “great”. The Normans used it to honour Charlemagne (742–814), as Carolus Magnus (Charles the Great). Variant spellings of the name include MacManus, Manus and MacManners. The English form, Moyne, is also found in Ulster. In Scotland it is a sept of Clan Colquhoun.

There are two principal septs of the name in Ireland:

One descends from Maghnus (died 1181), son of Turlough Mór O’Conor, High King of Ireland (1119–1156); this branch belonged to Kilronan in the county of Roscommon in the province of Connacht. The second sept was a branch of the Maguires, who descend from Magnus, son of Donn Maguire (Donn Mag Uidhir), Chief of the Kingdom of Fermanagh (died 1302). This family lived on the shores of Lough Erne, in what is now County Fermanagh.

McManus Surname Meaning

Irish and Scottish: Anglicized form of Gaelic Mac Maghnuis or Mac Maghnusa a patronymic from Maghnus later Mánus a Gaelic form of the Scandinavian personal name Magnus made famous by St. Magnus of Orkney. As an Irish name this is found mainly in Roscommon and Fermanagh and is connected with the O’Connors or the Maguires; in Scotland it is connected with the Colquhouns.

Source: Dictionary of American Family Names 2nd edition, 2022