Déniz or Deniz (also written Denis in some parts of South America, see Denis) is a Spanish-Portuguese surname derived from the French surname De Niz.
People with Déniz surnames of Spanish-Portuguese origin can be found mostly in the Canary Islands, Azores, Madeira and in the Americas (USA, Cuba, etc.).
De Nice was written Déniz in Spanish and Portuguese.
People bearing that surname in Spain and Portugal and their descendants have the surname with French roots.
Alternatively, the Portuguese surname deNiz means "from the be-giN'ing", intricately related with the End.