Mayor Viegas Penagati

Mayor Viegas' father was Egas Pais De Penagati and her mother was Sancha Mendes (De Briteiros ).  Her maternal grandfather was Mem Pires De Briteiros. She had two brothers and a sister, named Egas Viegas De, Gomes Viegas De and Froilhe Viegas De.

They had a son named João Pires.