It is likely that there are no sources for Fredrick Hacker because he never existed. All that is known of him is an equally dubious father, a birthdate derived from that father's date of death, and the claim that he was the father of John Hacker Esq, born in Yeoville, Somersetshire, England.
But there is an attested line of Hackers in Yeoville, dating back to at least the mid-15th century, from whom this John Hacker was more likely derived. Fredrick appears to be an unnecessary hypothesis.
This person was created on 19 May 2010 through the import of My Family File.ged.
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Categories: Unsourced Profiles | Uncertain Existence
But there is an attested line of Hackers in Yeoville, dating back to at least the mid-15th century, from whom this John Hacker was more likely derived. Fredrick appears to be an unnecessary hypothesis.