Irish retired hurler Seamus Hughes (trade unionist) (1881–1943), Irish trade unionist, revolutionary, composer, and public servant Séamus Hughes (born 1952), Irish judge and politician Séamus Keely (1889–1974), Irish politician Seamus Kelly (footballer) (born 1974), Irish former footballer Seamus Kelly (rugby union) (born 1991), American former rugby union player Séamus Kennedy (cyclist) (1947–2012), Irish cyclist Seamus Kennedy (singer) (born 1964), Irish singer, comedian and writer Séamus Kennedy (hurler) (born 1993), Irish Gaelic footballer and hurler Séamus Kenny (born 1980), Irish Gaelic footballer Séamus Kirk (born 1945), Irish politician Seamus Kotyk (born 1980), Canadian ice hockey coach and former goaltender Séamus Lagan (1947–2018), Irish Gaelic footballer Seamus Leydon, Gaelic footballer Séamus Looney (born 1950), Irish former sportsperson Seamus Ludlow (1929–1976), Irish forester and murder victim Seamus Lynch (born 1945), former Irish republican and socialist politician Séamus Mac an Iomaire (1891–1967), Irish botanist and writer Séamus Mac Cathmhaoil, Anglican Archbishop of Cashel Seamus Mac Cruitín (1815–1870), Irish poet and bard Séamus Mac Dhòmhnaill, 6th of Dunnyveg (died 1565), Scottish Clan Chief Séamus Mac Gearailt (born 1945), Irish retired Gaelic football trainer, coach, selector and former player Séamus mac Pilib Mac Mathghamhna (died 1519), Bishop of Derry Seamus MacBennett (1925–1995), footballer Séamus Mackey (born 1938), retired Irish sportsperson Seamus Malin (born 1940), Irish former journalist Seamus Mallon (1936–2020), Irish politician: Senator, MP, MLA, and deputy First Minister of Northern Ireland Seamus Mallon (rugby union) (born 1980), Irish former professional rugby union player Seamus Maloney, former Australian rules footballer Seamus Martin (born 1942), retired journalist and broadcasting administrator Seamus McCaffery (born 1950), American judge, Pennsylvania Supreme Court justice Seamus McCallion, Irish former professional rugby league footballer Seamus McCarthy, Ireland's Comptroller and Auditor General Séamus McCarthy (born 1954), Irish former Gaelic footballer Seamus McDonagh (boxer), actor, screenwriter, filmmaker and retired boxer Séamus McElwaine (1960–1986), volunteer in Provisional Irish Republican Army Séamus McEnaney, Gaelic football manager and businessman Séamus McFerran (1916–1968), president of the Gaelic Athletic Association Seamus McGarvey (born 1967), Northern Irish cinematographer Seamus McGrane (died 2019), Irish dissident republican Seamus McGrath (born 1976), Canadian retired professional mountain biker Seamus McGraw, American journalist and author Séamus McGuinness (1930–2008), Irish Gaelic footballer Seamus McGuire, Irish fiddle player Séamus McHugh (born 1956), Irish Gaelic footballer Seamus McIntyre (1971–2001), Irish sportsperson Seamus McKee, Northern Irish broadcaster Seamus McMurphy (c. 1720–1750), Irish poet and rapparee Seamus McNamara (born 1985), American-born former Australian rules footballer Seamus McSporran (born 1938), Scottish retired