Delaney comes from an English surname with two possible sources:
- the first is that it may be derived from a Norman French place name, de l’aunaie, meaning “from the alder grove”;
- the second is that it comes from an Irish surname, the anglicized form of Ó Dubhshláine meaning “descendant of Dubhshláine”, the latter made up from Gaelic elements dubh (black) and slán (defiance, challenge) though it also means “healthy, safe”. The latter element may also refer to the River Sláine (anglicizied as Slaney) meaning “health, healthy”.
Origin: Norman-French, Gaelic