Nadia is a female name, diminutive of the given name Nadezhda, used predominantly throughout the Mediterranean, Eastern Europe, Latin America and the Arab world. It has also seen some popularity in Quebec. Its origins are in the Slavic and Ancient Greek languages.
In Bulgarian and Russian, on the other hand, Nadia or Nadya (ÐадÑ, accent on first syllable) is the diminutive form of the full name Nadyezhda (Ðадежда), meaning "hope" and derived from Old Church Slavonic, which it entered as a translation of the Greek word ελπίς (Elpis), with the same meaning.