General Vasco Mascarenhas, 1st Count of Óbidos, OC (c. 1605–4 July 1678), was a Portuguese nobleman and colonial governor, who was Governor General of Brazil, Viceroy of Brazil and Viceroy of India.

[1] He was the son of Fernão Martins Mascarenhas, Lord of Lavre, and his wife, Maria of Lancaster, great-grandchild of Dinis of Braganza, Count of Lemos and a dynast of the House of Lancaster and of the House of Braganza.

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