Origin: Italian, Spanish, English, Sumerian, Russian, Slavic, Hebrew
Meaning: a short form of names that end in -nina such as Antonina (from Latin Antoninus, of uncertain meaning and etymology) or Giannina, the Italian diminutive of Giovanna, ultimately deriving from John meaning "Yahweh is gracious".
It could also be short for names like Marina (from Latin Marinus meaning "of the sea") or Katharina, which has several possible meanings: “pure, chaste” from the Greek katharos; or it could come from hekateros, “each of the two; singly”; or from Greek aikia meaning “torture”. It could also be a Coptic name meaning “my consecration of your name”.
Nina could also be a nicknames of Ann or Anina, both deriving from Hebrew Channah meaning "grace" or "favor".
It's also the Spanish word for "little girl" from niña.
Nina is the name of a Sumerian fertility goddess usually identified with Ishtar; the name probably means "water lady" or "lady of the water" from nin (lady) and a (water); the city of Ninevah was named after her, being its chief diety. In cunieform, Nina (or Ninâ) is written with a fish inside of a house.
In Quechua and Aymara, Nina means "fire"; Quechua and Aymara is a language used in South America by the indigenous people.
Nina is also the Russian form of Nino, itself a Georgian feminine name that might be related to Ninos (or Ninus), which might possibly be related to the Sumerian goddess Nina. Nino is a popular name in Georgia due to Saint Nino, who converted much if Georgia to Christianity.
Nina could also come from an old Slavic word, ninati, meaning "dreamer" or "dream", as well as being a Hebrew name meaning "granddaughter" or "great-granddaughter".