Jason,
I would be willing to bet that if you could trace your Fraga line back far enough, you would eventually come to a "Jacob de Fraga". On Flores (and by extention on Corvo since there is a lot of intermarriage between the two islands) there have been several instances of using what is normally a first name as a "surname".
I can cite a specific example from the book "Familias ds Ihla das Flores" by Francisco Antonio Nunes Pimentel Gomes. In one family he traces, a Nicolau de Fraga married to Maria Furtada has a son Manuel Francisco Nicolau, who in turn has a son Francisco Antonio de Fraga, who in turn has a son Manuel Francisco Nicolau. I could cite several other examples. In some cases the "new surname" sticks. In other cases it alternates by generation or unpredictably.
In my own family tree, I
have a 3GGFAntonio de Freitas Eduardo (m 1782) from Fajazinha Flores whose father was Eduardo de Freitas. In present day Fajazinha there is an Eduardo family who I'm sure I'm related to. In that case, the Eduardo name "stuck".
As to "why?" In the case of my "Freitas Eduardos", Freitas is a very common Portuguese surname. I would bet that my ancestor wasn't the only "Antonio Freitas" living in Fajazinha at the time. So my theory is that when there were several people with the same name, the custom developed to distinguish between them by their father's first name. Just my theory.
By the way, there area a lot of Fraga families on Corvo so my theory would seem to fit there.
John Vasconcelos
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