Cavanagh or Cavanaugh is a surname of Irish origin, a variation of the Irish family surname Caomhánach.
Cavanagh and its variations are anglicisations of the Irish surname Caomhánach (Caoṁánaċ in traditional Gaelic type).
[1] The surname was first assumed by Domhnall, eldest son of the 12th century King of Leinster, Diarmait Mac Murchada in Ireland.
[2] A considerable number of anglicised variations of Caomhánach exist, with some of the most common being: "Kavanagh", "Cavanagh", "Kavanaugh" and "Cavanaugh".
[3] Clann Chaomhánach/Cavanagh covers the following known variations of the family name: Kavanagh, Kavanaugh, Kavanah, Kavenah, Kabana, Kavaner, Kavenaugh, Kavanacht, Kaveny, Kevane, Cavanaugh, Cavanah, Cavenah, Cavana, Cavana, Cavner, Cavenaugh, Cavender, Cavenogh, Cavnar, Cavignac, Cavanaogh, Cavanogh, Cabanah, Chaomhana, Cowand and many others...[3][1] List of people with the surname Cavanagh: List of people with the surname Cavanaugh: