Rehman or Rahman (Arabic: رحمن, Raḥmān) is an Arabic and Hebrew origin surname meaning "Gracious", "King", "Merciful" or "Lord" based on the triconsonantal root R-Ḥ-M. With nisba (Arabic onomastic), the name becomes Rehmani, means "descendant of the gracious one" and is also used as a surname by some people belonging to Sayyed community and also by some Pashtuns/Pathans in India and Pakistan.

The Rehman/Rahman name doesn't represent any religion but it is common name In Islam, Ar-Rahman (The Most Gracious) is one of the Names of God.

[1] Rahman has many ways to be written in different languages.

See the following pages:

Also the following individual names: