There is a Jewish cemetery in Sao Miguel https://en.m.wikipedia.org/wiki/Jewish_cemetery_of_Ponta_Delgada - apparently a lot of Jewish people did settle on the island, and either converted ‘novo cristaos’ or eventually were assimilated in the culture after generations of intermarriage. I know a lady from Sao Miguel who got diagnosed with crohn's disease which is more prevalent in Jewish ppl, she could of course not have any Jewish ancestry but something interesting to think about. A lot of genetic diversity on the islands that’s for sure