I just began doing some research myself. I know the name originated in the town of Alfaro, La Rioja, Spain around 12tth century; families migrated to Italy, Portugal, France, the Philippines & the Americas; I'm from Mexico originally & now in Calif. You could begin by typing "Alfaro" on a search engine; you might start @ http://www.cyndi'slist.com/hispanic
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. Wish you the best.