spelling

Correct spelling of names

Q: We want to know if these names are Islamically correct for our child. Also, the correct way to spell in English as our Arabic is not the best. These are the names:

Nur Addunya or Noor Addunya

Nur AlJannah or Noor Aljannah

Nur AlHayat or Noor Alhayat 

The name Umair

Q: Can you please give me the meaning of the name Umair. And how should it be pronounced. Its starting with ain. But if we pronounce with the sound of alif is it ok?