Numera (Numairah) means "little female leopard", it is a version of Namra (female leopard). It can be used as a name since the meaning is acceptable. It is not mentioned in the Quran.
Numera also means water that is clean and pure, and when used as a name it means someone who comes from a good family and tribe. It can be used by Muslims since it has a good meaning. It is not from the Quran.
The name is pronounced as (N)ame + p(U)t + (M)uslim + p(AY)ment + (RU)n. People may spell it as Numaira, Numayra, Numeira and Nomera.