Looking for families from india 5 brothers and 1 sister arrived in south africa many years ago. the khan fami?

there surnames khan and they jointly ran a business in the south coast of natal. they bought lots of properties and as years went by they went bankrupt. we are the grandchildren. i just just know they were from india, not too sure which part of india. they were stong guys but at age 60 plus they died due to diabetic, hp , gangerine.