Fruela I's Wikipedia page only lists one wife, Munia, and one child. Son connected here Rodrigo Romaes isn't listed as his son nor is Rodrigo's mother listed as Fruela's wife:
I don't see anything in the many notes in his profile that he had more than one wife, Munia, who is listed as his only spouse on his Wikipedia page:
https://en.wikipedia.org/wiki/Fruela_I_of_Asturias
Also: http://fmg.ac/Projects/MedLands/ASTURIAS,%20LEON.htm#AlfonsoIdied757
[ROMÁN . Barrau-Dihigo asserts that Román, alleged son of King Fruela and supposed ancestor of the Traba family, was an entirely fictitious invention[108]. He is, for example, named in the Nobiliario of Pedro Conde de Barcelos "Conde D. Roman hermano del Rey D. Alonso el Casto" as father of "D. Iuana Romanes" who married "Conde D. Mendo"[109].]
indicates that Roman / Romen is definitely not Fruela's son.
To begin with, Rodrigo is listed here as the son of the profile under discussion (Remon Romaes) and wife, Teresa Arias. Not a son of Fruela. That said, there is ample evidence that Fruela had more than one wife, since he had sons who were half-brothers.
"...Doña Juana Romaes, or Románez, daughter of Count Don Roman de Monterroso, who was the half-brother of King Don Alonso the Chaste, both sons of King Don Fruela Primero (i), - son of King Don Alonso el Catholic..."
https://www.google.com/books/edition/Descripci%C3%B3n_genealogica_y...
https://www.google.com/books/edition/Descripci%C3%B3n_genealogica_y...
https://www.google.com/books/edition/Descripci%C3%B3n_genealogica_y...
https://books.googleusercontent.com/books/content?req=AKW5QacxhCgV1...
All four links should lead to page 22 of the same book, "Descripción genealogica y historial de la ilustre casa de Sousa" (published 1770).
"Count Don Alonso Romanes de Monterroso father of Doña Adosinda, and grandfather of Countess Doña Teresa, was the son of
"Count Don Mendo de Rau Tona (f), brother of Desiderio, the last King of the Longobards, according to Bernardo Justiniano (?), And According to Count Don Pedro (h), a descendant of the Goths, in the way that Gandara explains on p. 64,
"and his wife Doña Juana Romaes, or Románez, daughter of Count Don Roman de Monterroſo, who was the half-brother of King Don Alonso the Chaste, both sons of King Don Fruela Primero (i), - son of King Don Alonso el Catholic..."