Murchadh is masculine given name in the Irish and Scottish Gaelic languages.
A Dictionary of First Names, published by Oxford University Press, defines the Irish name as being derived from the Gaelic elements muir, meaning "sea"; and cadh, meaning "battle". In the same book, the Scottish Gaelic name is defined as being a modern form of the Gaelic name Muireadhach, which means "lord", but is said to derive from muir, which means "sea".
Anglicised forms of the Scottish Gaelic name are Murdo and Murdoch. An Anglicised form of the Irish name is Murrough and Morrow. As a patronymic surname, Murphy and Morrow are also derived from Murchadh and its patronymics, MacMurchadh and Mac Murchadha
Murchad mac Áedo, king of ConnachtMurchad mac Brain Mut (died 727), king of LeinsterMurchad mac Brian Ó Flaithbheartaigh (1419), Irish chieftainMurchad mac Diarmata, king of Leinster, Dublin, and the IslesMurchad mac Flaithbertaig (died 767), chief of the Cenél ConaillMurchad mac Flann mac Glethneachan (fl. 973), king of Maigh SeólaMurchad mac Máele Dúin (fl. 819–833), king of AilechMurchad Midi (died 715), king of UisnechMurchad Ua Flaithbertaig (fl. c.1202-1241), bishop of Annaghdown,Murchad mac Briain, son of Brian Boru who died at the Battle of ClontarfMurchadh an Chapail Ua Flaithbheartaigh, (died 1036), a king of Maigh Seóla / Iar ConnachtMurchadh mac Aodha, (died 960), king of Uí MaineMurchadh mac Maenach (died 891), king of Maigh SeólaMurchadh mac Sochlachan, (died 936), king of Uí MaineMurchadh Ó Cuindlis, (fl. 1398-1411) Irish scribeMurchadh Ó Madadhain, (fl. 1347-1371), chief of Síol AnmchadhaMurchadh Ó Madadhan, (1327), king of Síol AnmchadhaMurchadh Reagh Ó Madadhan, (d. 1475), chief of Síol AnmchadhaMurchadh MacPhàrlain, known in English as Murdo Macfarlane, (1901-1982), Gaelic poet