The Research Like a Pro Genealogy Podcast

RLP 394: When Birthdates Don't Agree: Analyzing and Correlating Evidence

Jan 26, 2026
They tackle conflicting birthdates by examining census records, marriage bonds, land and residency documents, and death notices. A detailed case study of Mary Elizabeth Royston shows how to compare informants and local practices. They also discuss using AI and locality guides for record survival and research strategies.
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INSIGHT

Later Records Are Often Primary Evidence

  • Original records often don't survive so later-life documents become primary evidence for births and marriages.
  • You must analyze each source's creation time and context to judge reliability.
ADVICE

Use Census Day And Visit Dates To Bracket Ages

  • Treat each census entry as original but evaluate household details as undetermined if the informant is unknown.
  • Use enumerator visit dates and census day to bracket likely birth ranges for unnamed children.
ANECDOTE

Marriage Bond Misread As Age Proof

  • Diana examined an 1855 marriage bond where Mary's father acted as surety and found it wasn't decisive for age.
  • AI (ChatGPT 5.1) helped interpret that local practice often used the bond form broadly, not only for minors.
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