Portuguese Citizenship Eligibility
Following an eviction order in 1492, the Jews of Spain were expelled from their homes. Approximately two-thirds of these individuals fled to Portugal; however, five years later, a similar expulsion order was issued to the Jews in Portugal. As a result, applicants now have the choice of acquiring nationality in Portugal.
Since April 2015, Portugal has been granting citizenship to descendants of the Jews expelled from Portugal as well as those who fled Spain.
Jewish origins are requested for the process to obtain Portuguese citizenship
The link can be proved by: Birth certificate, wills, internet article, books, graves….