Posted from email message of Rui Pereira, Portugal:
In my Sephardic ancestry I have the Pereira surname: José Lopez de Rivera, born c. 1661 in Marchena (Spain), married to
Beatriz Lopez Pereira, born in Guiñón (Spain). They are parents of Leonor Rodriguez, born August 1686 in Granada (Spain).
Beatriz Lopez Pereira's parents were Manuel Pereira and Leonor Lopez, and that's as far as I could go up to now.
These Lopez Pereira should be related to a Sephardic merchant named Moses Lopez Pereira (1699-1759), who lived in Portugal and then moved to Austria where he was made a Baron (Baron d'Aguilar) in 1726