Prof. Sebastiao Jose Roiz traces his ancestory to an Algarve born converso named Diogo Rodrigues after whom Rodrigues island was named. Diogo was once captain ofRachol fort. Some of his other ancestors include Vital Porobo Dessay of Colva - 1550, the Raja ofUxem, Rama Naique Dessay, 1880, and Lourenco Mariano do Rosario Roiz of Colva, 1780, More recent ancestory lies with Valeriano Gerson Rebelo and Angela Pereira de Andradee Rebelo, Goa. I found them on Geni.