Vermudo Fróilaz
- Marriage: Aldonça Rodríguez
 Noted events in his life were:
• Reference:
Alberto y Arturo García Carraffa, Enciclopedia Heráldica y Genealágica, Tomo 70, Madrid 1953, p.1
Condes Fruela Bermúde, señor e Trastámara, a rich man of Galicia and a great knight, married doña Sancha (Aldonça) Rodríguez. They were the parents:
Rodrigo Frolaz, conde de Trastámara and a wealthy man of Galicia and Portugal married Moñina González. they were the parents of:
Fruela Bermúdez, also called Frolaz Vermuiz, married doña Elvira González. they were the parents of:
Rodrigo Frolaz, conde de Trastámara arried Urraca Ruiz de Castro. They were the parents of:
Gonzalo Rodrígiez Frolaz, also called Gonzalo Ruiz, was the first of his family to move from Galicia to Portugual. He was the ower of Coto de Palmeira. He married doña Frolle Alonso, and they were the parents of:
Ruy González Pereia, señor del Castillo de Llanoso, was the first to use the name Pereira, which came from his manor in Portugal. Ruy married doña Sancha Enríque Portocarrero.
• Reference:
Francisco Antonio de Alarcón,
Nobiliario del Conde de Barcelos, Don Pedro, Hijo del Rey Don Dionis de Portugal, pp. 43-45, 144
El conde don Mendo married doñ Juana Romanes, the daughter of conde don Roman, the brother of del rey don Alonso el Casto. Their son was conde don Frolaz Mendendez who married condesa doña Grinivera, daughter of el conde don Alvaro de Asturias. The son of don Frolaz and doña Grinivera was conde don Vermui Frolaz who married Aldonça (Sancha) Rodriguez.
Vermudo married Aldonça Rodríguez.
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