Gonçalo da Silveira, S.J. Personal details Born 23 February 1526 Almeirim, Kingdom of Portugal Died 6 March 1561 (aged 35) Kingdom of Mutapa Nationality Portuguese Occupation Jesuit priest and missionary Gonçalo da Silveira, S.J. (23 February 1526 - 6 March 1561) was a Portuguese Jesuit missionary in southern Africa.