Who is Wee Willie Winkie?

The actual father of Saleem Sinai, Wee Willie Winkie loses his own child when it is switched with the Sinai child soon after the babies are born. Wee Willie Winkie is a traveling singer who happens to be around the Methwold estate in August 1947. After he loses the child's mother in childbirth, he stays around Bombay for a while, a ruined alcoholic, singing on the streets with his ruined voice.