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Sources

  1. MyHeritage.com Website, Researched by Gary Griggs, 7/9/2021.
  2. U.S. Census, Baltimore County, MD, 1880 Census.
  3. FamilySearch.org/Search Website, Researched by Gary Griggs, 8/1/2013.
  4. U.S. Census, Baltimore County, MD, 1900 Census.
  5. MyHeritage.com Website, Researched by Gary Griggs, 12/17/2015.
  6. FamilySearch.org/Search Website
    , Researched by Gary Griggs, 12/17/2015.
  7. Wilde, Wendy Research of the Svec Family, Researched by Gary Griggs, 1/4/2016.
  8. MyHeritage.com Website, Reserched by Gary Griggs, 7/1/2021.
  9. U.S. Census, Baltimore County, MD, 1910 Census.
  10. Gary Griggs Research of the Griggs, Pergande and Related Families.
  11. U.S. Census, Baltimore County, MD, 1920 Census.
  12. MyHeritage.com Website, Researched by Gary Griggs, 8/13/2019.
  13. MyHeritage.com Website, Researched by Gary Griggs, 7/8/2021.
  14. MyHeritage.com Website, Researched by Gary Griggs, 3/9/2015.
  15. MyHeritage.com Website, Researched by Gary Griggs, 12/7/2021.
  16. Mack-Hrdlicka Family Tree on Ancestry.com.
  17. MyHeritage.com Website, Researched by Gary Griggs, 1/17/15.
  18. FamilySearch.org/Search Website
    , Researched by Gary Griggs, 12/7/2021.
  19. U.S. Social Security Death Index, Researched by Gary Griggs, 11/5/2008.
  20. U.S. Census, Baltimore County, MD, 1930 Census.
  21. U.S. Census, Baltimore County, MD, 1940 Census.