My "Azevedo" ancestors were from the north of Portugal, being Jerónimo the oldest that I found,. He was born about 1630 in Bairros, Paço de Sousa, Ermegilde, District of Porto and married Maria de Adrião Miguel.
In the year 1703 their grandson Manuel Azevedo, married Maria Moreira. The family "Moreira" was from the same village at least since 1650.
After Manuel and Maria got married that entire descendant line from both families become "Moreira de Azevedo" for the next 270 years.
There was, as well, an union with the family "Ferreira" from the same village about 1630.
Other lines are "Rodrigues Lopo" and the "Fernandes", both families from Grijó, Porto, and also from the same era.
On other lines, there are the "Casais" from Moncorvo, the "Fonseca" from Oliveira de Azemeis, District of Aveiro, the "Lourenço" from Mertola, Alentejo and many others.
There is yet the possibility of finding documents to connect one of these families to the founders of the Monastery of Grijó, that is historically very well documented in the "Livro das Campaínhas" which can possibly take that portion of the tree to the year 912!
Presently I live in Ontario, Canada.
One of my web pages is: http://home.primus.ca/~ivo_azevedo