Clarke is a surname which means "clerk". The surname is of English and Irish origin and comes from the Latin clericus. Variants include Clerk and Clark. Clarke is also uncommonly chosen as a given name. Irish surname origin. Clarke is a common surname in Ireland. The Irish version of the surname is believed to have come from County Galway and County Antrim and spread to County Donegal and County Dublin. The name is derived from the Irish Gaelic sept Ó Cléirigh, meaning "clerk". English surname origin. Clarke, as well as Clark, is also a widespread surname in England.
https://en.wikipedia.org/wiki/Clarke