Family from Holland
Originally from Spain
"...[they] settled in Amsterdam after the expulsion."
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"As far as I can tell from the genealogy records, [my mother's] family came from Holland in the mid-1850s and settled in the central London area in the Jewish district. My [maternal] grandfather was a cigar maker and also worked with stained glass, so he was an artisan. He did spend time in the Merchant Marines during World War I, but the family name, Decker, is most likely Dutch, and it was, I believe, originally Dukker, d-u-k-k-e-r, until they spelled it the English way.
I don’t have any direct evidence, but from what my grandmother shared from her knowledge, it’s believed that they were originally from Spain and settled in Amsterdam after the expulsion in the late – excuse me—in the early 1490s."