Dontaay is an Irish surname of Gaelic origin, derived from the word dón, meaning little hill or mountain. It is believed to have originated in County Cork, where it was commonly used as a surname among the OBrien and ODonoghue families. Dontaay is also associated with the Donaghue clan, who were prominent in the 17th and 18th centuries. The name is thought to have been brought to Ireland by the Normans, who introduced their own surnames and customs. Over time, the name has evolved and been adapted into various forms, including Donovann, Donavan, and Donavon. Today, the name is still found in Ireland and is also used in other countries, including the United States and Canada.