Without more information it would be difficult for anyone to help you. You should provide any of the following you might know.
Dates or approximate dates of b, m, d.
Location: Counry > Province, Region, State, County > City, town of bmd
Any Parents, silbings, spouses, childrens names.
A WikiTree ID - if he has one.
The only one who might now if the Robert you are looking for - lived in the UK in 1480 or India in 1990, is you!