Hi Chris. My father's family is from Foz. My father's full name is Carlos Manuel dos Santos da Silva. My grandfather (father's father) has the name of da Silvabut his siblings do not. There is a sister and a brother. Their last name is Gaspar. I have heard different stories as to why the last names do not match. The siblings all had the same father. I will tell you more if you respond to this email. I have been interested in learning more about my family tree but getting info from the older generation is almost impossible. I do know I do have many relatives in the USA. Hopefully you are one of them!