Madden is the Anglicized surname of Madadhan of Irish origin, meaning "hound".
[1] It is also a less popular, gender-neutral given name.
[2] According to historian C. Thomas Cairney, the O'Maddens were a chiefly family of the Uí Mháine tribe who in turn were from the Dumnonii or Laigin who were the third wave of Celts to settle in Ireland during the first century BC.
[3]