title: Dennehy
text: Dennehy is a surname of Irish origin. The original form in Irish is Ó Duineachdha, meaning descendant of Duineachaidh, who was a chieftain who fought the Danes in Limerick in 934. The name may mean "humane", or may mean "man from the fairy hills". Spelling variations include Denehy, Dennehey, Denehey, Danahy, Deniehy, and Denahy. The name may refer to:
  
  Billy Dennehy (born 1987), Irish football player
  Brian Dennehy (1938–2020), American actor
  Daniel Deniehy (1828–1865), Australian writer and politician
  Darren Dennehy (born 1988), Irish football player
  Donnacha Dennehy (born 1970), Irish composer
  Elizabeth Dennehy (born 1960), American actress
  Joanna Dennehy, serial killer; see Peterborough ditch murders
  John Dennehy (born 1940), Irish politician
  Miah Dennehy (born 1950), Irish football player
  Mick Dennehy (born 1950), American football player and coach
  Ned Dennehy (born 1965), Irish actor
  Peter Denahy (born 1972), Australian musician
  Thomas Dennehy (1829–1915), British general
  William Francis Dennehy (1853–1918), Irish writer
  
  Surnames of Irish origin