Nasir (Arabic: ناصر, romanized: Nāṣir) is a masculine given name, commonly found in Arabic which can mean "helper" or "one who gives victory" (grammatically the Stem I masculine singular active participle of consonantal verb root n-ṣ-r).
The female form of the name is Nasira (Arabic: ناصرة, romanized: Nāṣira).
Alternative spellings of this name, possibly due to transliteration, include Naser, Nasser, Naseer, and Nacer.