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- Liam Naughten (1944–1996): FG Senator 1981–1982, 1989–1996, FG TD Roscommon 1982–1989
- his son Denis Naughten (born 1973): FG Senator 1997, FG TD Longford–Roscommon 1997–2007, Roscommon–South Leitrim 2007–
- Tom Nolan: (1921–1992): FF TD Carlow–Kilkenny 1965–1982, MEP 1973–1979
- his son M. J. Nolan (born 1951): FF TD Carlow–Kilkenny 1982–2011
- William Norton: (1900–1963): Lab TD Dublin County 1923–1927, Kildare/Carlow–Kildare/Kildare 1932–1963
- his son Patrick Norton (born 1928): Lab TD Kildare 1965–1969, Senator 1969–1973
Read more about this topic: Families In The Oireachtas