What is the ruling on some Indians using the term "Arbab" for a citizen man in their country?

The name "al-Rabb" (the Lord) is exclusively used for Allah and is not applied to anyone else unless it is used in a genitive construction, such as "Rabb ad-Dar" (the lord of the house) or "Rabb al-Kitab" (the master of the book). The Prophet, may Allah bless him and grant him peace, forbade a servant from saying to his master, "Feed your Lord," or "Help your Lord perform ablution," because true Lordship belongs solely to Allah Almighty. He is the Owner and Sustainer of all things.