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They have two sons, Savant Kaushalya and Passant Vatsalya, both electrical engineers specialising in Image processing, Graphics, and Video Processing. The elder, Savant Karunaratne has a PhD in Electrical and Computer Engineering from the University of Sydney, Australia. The younger, Passant Karunaratne has a PhD in Electrical Engineering and Computer Science from Northwestern University, in Evanston, Illinois, and is a Principal Research Engineer in the United States.