Dennehy Explained

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