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"Lenihan" is an Irish surname. Variants include Lenighan, Lenegan, Lenaghan, Lenahan, and Lennihan. Lenehan is a similar name.
Notable people with the surname include:
Athletes Donal Lenihan (born 1959), Irish rugby union player Karl Lenihan, Gaelic football player Darragh Lenihan, Irish professional football player
People in the arts Edmund Lenihan (born 1950), Irish author Winifred Lenihan (1898–1964), American actress, writer and director Graham Linehan (born 1968), Irish writer and director (Father Ted)
Politicians Brian Lenihan Snr (1930–1995), Irish Fianna Fáil politician Brian Lenihan Jnr (1959–2011), Irish Fianna Fáil politician Conor Lenihan (born 1963), Irish Fianna Fáil politician J. Michael Lenihan (1943–2015), Rhode Island state senator Mary O'Rourke (née Lenihan; born 1937), Irish Fianna Fáil politician Patrick Lenihan (1902–1970), Fianna Fáil politician
Officers Michael Joseph Lenihan (1865–1958), a US-army general in World War I
Scientists J. M. A. Lenihan (1918–1993), British clinical physicist
Religious leaders George Michael Lenihan (1858–1910), fifth Catholic Bishop of Auckland 1896–1910 Thomas Mathias Lenihan (1843–1901), American Catholic bishop
See also James J. Lenihan Dam, in Santa Clara County, California Lenehan, a surname