Terry

Terry is an English given name that arose as a medieval contracted form of the Old French name Thierry, itself derived from the Germanic elements þeudō, meaning people or nation, and rīc, meaning power or ruler, making it a cognate of Theodoric. It was introduced to England by the Normans and gradually became established as an independent given name rather than merely a diminutive. In the twentieth century it gained wide popularity in English-speaking countries as both a masculine and feminine name. Related forms include Thierry, Theodoric, Derek, and Derrick.