Nena in Spanish is a affectionate way of calling a little girl or teenager, it is very sweet, it could be "honey" or "babe" in English. For boys it is Nene. Anyway, it is a common nickname for Elena and Magdalena, also used for girls that have the same name as their mother. I have a little cousin named "Barbara" and everyone calls her "La Nena". It started as a little family slang and now it is basically her name. And it is very sweet indeed!
― Anonymous User 6/16/2018
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Also a feminine name in Croatia. Often used as a short form of Nevenka.