[2] His father was Abeyratne Banda Ratwatte, Basnayake Nilame of the Maha Vishnu Devale and Shroff of the Mercantile Bank of India in Kandy and mother Thalgahagoda Lewke Punchi Kumarihamy, daughter of Thalgahagoda Rate Mahatmaya of Matale.
Educated at Trinity College, Kandy; Ratwatte married Rosalind Mahawelatenne Kumarihamy, daughter of Mahawalatenne Rate Mahatmaya of Balangoda.
Of their two daughters; the eldest Sirimavo Ratwatte was married to Solomon West Ridgeway Dias Bandaranaike, son of Sir Solomon Dias Bandaranaike, the Maha Mudaliyar (chief native interpreter and advisor to the Governor), who became the third Prime Minister of Ceylon.
The youngest daughter, Patsy Ratwatte was married to Colonel Edward James Divitotawela, who founded the Central Command of the Ceylon Army.
His grand daughter Chandrika Kumaratunga was President of Sri Lanka and his grandson Anura Bandaranaike, was a former speaker and cabinet minister.