Rowena was born in Singapore in the Year of the Monkey to privileged parents, direct line descendants of exiled Sultans from the Dutch-colonised East Indies Archipelago. Educated mainly in Singapore at two prestigious Mission Schools, she first pursued a modelling career and became Miss Singapore, representing Singapore in an international beauty pageant. She later worked with the Red Cross Society and the UNHCR to resettle 14,000 Indochinese refugees temporarily placed on Pulau Bidong, off the east coast of Malaysia. In 1986, she moved to Hong Kong, obtained an MBA in Corporate Law and Industrial Psychology and took on various management roles. Since 2015, she has been living in Kuala Lumpur, Malaysia.