Dennis surname meaning

Dennis is a surname from the personal name Dennis, also written Denis or Denys. The given name developed through forms of Dionysius, the Greek name associated with Dionysos, and was carried through Christian naming traditions by saints named Denis. Once a given name became hereditary, Dennis could identify the family of an ancestor who bore it. Dennes, Dinnis, and other spellings appear in historical records, while modern families may have different regional routes. The personal-name origin is consistently documented, so Dennis is classified as a parent’s-name surname with high confidence.