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Gershom Flagg 1641–1690

Public Tree Person

What is a Public Tree Person?

A Public Tree Person is an ancestor documented independently by multiple YourRoots tree owners. When several researchers' family histories converge on the same person, we publish a shared page that combines what they've documented.

Why this is a Public Tree Person

Full name consistent across 14 independent trees
Birth year and location consistent across 14 trees
Death year and location consistent across 14 trees

Compare a Public Tree Person with your own tree using Compare Tree.

B Reliability
B
Reliability Score: B
Medium — based on the source tree
Grade scale
  • A 3 criteria (Strong)
  • B 2 criteria (Medium)
  • C 1 criteria (Basic)
Verification checklist
  • Record available
  • Descendant's record available
  • Star tree owner

14 researchers on YourRoots have Gershom Flagg in their family trees — each with their own records and documentation. Trace the migration path across 4 generations. If this ancestor is in your tree too, you can compare what you've found and fill in the gaps together.

Last updated: August 25, 2026 · Reliability: B — verified across 14 independent trees

Born 16 Apr 1641 · Watertown, Middlesex, Massachusetts Bay Colony
Died 6 Jul 1690 · Lee, Strafford, New Hampshire
Father Thomas Flagg
Mother Mary Gershom
Siblings Allen Flagg, Bartholomew Flagg, Benjamin Flagg, Eleazer Flagg, Elizabeth Flagg, John Flagg, Mary Flagg, Michael Flagg, Rebeckah Flagg, Thomas Flagg, William Flagg
Records
U.S., Sons of the American … Netherlands, GenealogieOnline Trees Index North America, Family Histories
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Researchers connected through Gershom Flagg 1641–1690

and 12 more tree owners connected with Gershom Flagg 1641–1690

Immediate Family

Spouse(s)
No spouse recorded
Children
No children recorded

Biography

In 1641, Gershom Flagg entered the world in Watertown, Middlesex, Massachusetts Bay Colony, born to thomas flagg and mary gershom. Gershom Flagg passed away in 1690 in Lee, Strafford, New Hampshire.

Sources

  1. 1
    Record U.S., Sons of the American Revolution Membership Applications, 1889-1970

  2. 2
    Record Netherlands, GenealogieOnline Trees Index

  3. 3
    Record North America, Family Histories

Life Timeline

1641
Birth of Gershom Flagg in Watertown, Middlesex, Massachusetts Bay Colony
Birth
1690
Death of Gershom Flagg in Lee, Strafford, New Hampshire
Death

Oldest Ancestor Line from Gershom Flagg

This ancestor line traces from Whinbergh, Yaxham, Norfolk, England (1550) to Watertown, Middlesex, Massachusetts Bay Colony (1641) across 4 generations.

Direct Lineage
generations

Frequently Asked Questions

Gershom Flagg (1641–1690) was born in Watertown, Middlesex, Massachusetts Bay Colony and died in Lee, Strafford, New Hampshire. 14 researchers on YourRoots have this ancestor in their family trees, each with their own records. This page combines what they've independently documented and assigns a Reliability Score (B) based on cross-tree validation.
Right now, 14 researchers on YourRoots have Gershom in their trees. They're working independently, so connecting with them is a good way to cross-check your records and find things you might have missed. You can also explore the ancestor migration map that traces 4 generations of this lineage geographically.
It varies by researcher — some have census records, others have marriage certificates, parish registers, or family Bible entries. Scroll up to see exactly what each person has cited.
Use the "Compare Tree" button on any researcher's profile above. You can compare your tree side by side with theirs, see where your records overlap or differ, and collaborate to fill gaps.

Related Records

Thomas Flagg
Father
Mary Gershom
Mother

Gershom Flagg's Ancestors

Pedigree chart — 3 generations on record

Self
Gershom Flagg PTP
1641–1690
Watertown, Middlesex, Massachusetts Bay Colony
Parents
Unknown
Unknown
Grandparents
Unknown
Unknown
Unknown
Unknown

Gershom Flagg's Descendants

1.
GF
Gershom Flagg PTP 1641–1690