8. Raj Kumar & Kishin RK, $2.4B
The father-son duo behind the Royal Holdings/RB Capital empire are yet another pair that have found their fortune in property.
Raj Kumar (63) is the owner of Royal Holdings, a 70-year-old group with its origins in textile trading. With his younger brother Asok Kumar Hiranandani, both built the company to become the wealthiest non-Chinese family business in Singapore real estate.
In 2014, he announced a merger RB Capital, which was founded by son Kishin RK (34) in 2006.
Owning a slew of properties in Singapore, like InterContinental Hotel at Robertson Quay, Farrer Square Medical Suites, they have plans to open a 60-storey commercial tower at Raffles Place and are looking to expand overseas in the future.