Many Jews in Spain and Portugal assimilated into the population following the Inquisition and expulsion.  I have seen estimates that one-fourth of the Spanish population has Jewish ancestry.

 

Approximately a century following the expulsion from Spain, the Spanish Armada had its (mis)adventures in Ireland.

 

Through such dynamics, there no doubt is Jewish DNA to be found amongst today's Irish population.

 

-- Ken Ryesky

Petach Tikva, ISRAEL