Misba is an Arabic word that means light and is often associated with oil lamps, also called "Chiraag" or "Chiraag ki Roshni" in Hindi or Urdu. Another meaning for Misba is Innocent, but it's not seen as commonly.
It is seen in Surah An-Noor 24:35 (The Light) in the Holy Quran.
There are 2 basic ways to spell it as a name, Misbah (Boys) or Misba (Girls).
My girlfriend, Misba, has big beautiful eyes.
In Surah An-Noor 24:35, Allah tells the people about the light (Misba) and how they must use it to guide them away from impurity and illegal sexual intercourse.