Indian immigrant- Naraina Pillai

Naraina Pillai was a social entrepreneur and businessman, who spent most of his life in Singapore 

during the colonial period. Of Tamil origins, he greatly contributed to the Tamil community in Singapore. In 1819, he worked in Penang, which was ruled by the British. He met Stamford Raffled, who was a senior official of the British East India Company, who was keen to establish a new trading post at the southern end of the Straits of Malacca. In Penang, Raffles persuaded Pillai to join him and to work at his new settlement. Pillai arrived in Singapore with Raffles in 1819 on the ship " Indiana ", making him one of the first Tamil men to set foot there.He started his career there as a chief clerk at the government Treasury, where he verified the authenticity of currency. However, he soon moved on to become a successful entrepeneur and community leader in his own right.

Malay immigrant- Yusof Ishak

Yusof Bin Ishak is one of the Malay immigrants. He was the Singaporean politician and was the first president of Singapore, serving from 1965-1970. His portrait also appears on the Singapore Portrait series currency notes introduced in 1999. Yusof was the descendant of prominent Sumatran Malay Datuk Jannatun who migrated to Penang in 1759. He was of Minangkabau descent from his father's side while his mother was a Malay from the Lankat region in Indonesia. His brother was a Malayan journalist and freedom fighter. He studied at Raffles Instituition.Following Singapore's depature from Malaysia in 1965, he served as the first president of the Republic until his death in 1970.