Are you living in Portugal — and if so, how long have you held a residence permit?
Portugal — Citizenship by Descent
Beyond a grandparent there is no claim that can be made from abroad. What the law offers a great-grandchild is a shortened naturalisation — five years of legal residence in Portugal instead of the seven or ten that would otherwise apply. So the question stops being who your ancestor was and becomes where you live.
Yes — five years or more → Yes — less than five years → No, I don't live in Portugal → I'm in Portugal but I'm not sure which of my time counts →
Question 2 · start again