We have no information on Zarwa. As for Zirwa please see: Zirwa
Sheraz or Shiraz is the name of a city in Iran. In common Persian usage it means “strained yogurt”, a creamy type of yogurt that is less watery than the usual kind.
Zirwa Sheraz is an acceptable name. Zirwa can also be written as Zerwa. As for Umaiza, we have no information on it.