Names, Surnames & Titles

Nicknames

Q:

  1. There are names of Allah when we keep we are not required to add Abd before them. Eg, Haleem. Which names of Allah should we be adding Abd to?
  2. Can we call people by nicknames? For eg, someone's called Hanzalah. Can we call them hanzu hanzli etc? What's the ruling regarding it.

The name Feroz and Feroza

Q: What does a boys name Feroz and girls name Feroza mean? I was told it's not permissible to keep a girls name Feroza and boys name Feroz,is this true? If yes will it be compulsory to change the name if the above names were kept and is it a sin if the names are not changed?