Hickey the surname is common enough where i am......

The surname Hickey is one of the most ancient Irish surnames (O hIcidhe or O'Caigh "descendent of the healer"), with the clan holding the position of court physicians to the powerful O'Brien royal family of Thomond.

Surnames were only introduced in Ireland around 1,000 C.E. This ancient Irish family claims to be descended from Heber, a son of Milesius, King of the Gauls who colonized Ireland many centuries before the Christian era.

In a genealogical article, The O'Hickeys by Lt Col J. Hickey M.C., it is stated that the O'Hickeys are descended from Cormac Colchin, second son of Cathan Fionn, 14th King of Munster who was said to have converted to Christianity in C.E. 420, having been baptised personally by St. Patrick. His great grandson Aodh Caomh, 17th King of Cashel and Munster is recorded to have built the first Christian church in Ireland, in Killaloe, County Clare.

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