History:

The widespread distribution of this surname likely reflects historical migrations. Wars or political changes might have forced families to move, leading to new settlements. People with this surname also might have moved voluntarily for jobs or better lives, creating new communities in different places. This surnames evolution might have changed slightly in various regions over time.

Description:

Khandakar: This surnames mostly used by Bengali Muslims. However, people with this surname come from all different social and economic levels within that community. Lots of Bengali Muslim families use this surname.

Khan, a shorter version, is one possibility. Another is Khandaker, a slightly different spelling. Regional variations might also exist, perhaps even combined with a first name like Khandakar-Ali, forming a new family name. However, proving these are truly related needs more digging.