In English, name Derry means – Diminutive of Derek: Gifted ruler. People ruler. Variant of the Old German Theodoric. Famous bearer: Derrick was a 17th century hangman at Tyhurn, whose name became synonymous with gallows and now refers to a type of crane… Other origins for name Derry include – English, Irish, Irish, Gaelic, German, Irish. Name Derry is most often used as a boy name or male name.