Terry

Proper noun

 * 1)  from the medieval Norman given name Thierry, a cognate of the English Derek.
 * 2)  transferred back from the surname, or a diminutive of Terence or of any of its alternative forms.
 * 3)  derived from the Latin for the third ("tertius") given to a third child or a child whose name has the suffix III.
 * , diminutive of Teresa or any of its alternative forms.