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Robert Duncan Thomson 1898–1973

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 2 independent trees
Birth year and location consistent across 2 trees
Death year and location consistent across 2 trees

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

A Reliability
A
Reliability Score: A
Strong — 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

2 researchers on YourRoots have Robert Thomson in their family trees — each with their own records and documentation. Trace the migration path across 11 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: A — verified across 2 independent trees, with linked records

Born 9 Nov 1898 · Orillia, Simcoe, Ontario, Canada
Died 24 Jul 1973 · Streetsville, Peel, Ontario, Canada
Father Duncan Cameron Thomson
Mother Nellie Gertrude Passmore
Spouse Helen Beatrice Dryden
Children Carol Elizabeth Harriett Thomson, Dorothy Jane Thomson, Duncan Dryden Thomson, Ethel Beatrice Thomson, Mary Yvonne Yvonne Thomson, Robert Kent Thomson
Siblings Caroline Marie Thomson, Donald Albert Don Thomson, George Edgar Thomson, James Hoccum Thomson, Jean Nellie Thompson, John Passmore Thomson, Ruth Frances Thomson
Records
1901 Census of Canada 1911 Census of Canada 1921 Census of Canada Canada, World War I CEF … Web: Canada, GenWeb Cemetery Index, … Canada, Find a Grave Index Ontario, Canada Births Canada, World War i CEF … Canada, Certificates of Military Instruction, … Ontario, Canada, Marriages, 1801-1928, 1933-1934
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Researchers connected through Robert Thomson 1898–1973

and 1 more tree owner connected with Robert Thomson 1898–1973

Immediate Family

Biography

Robert Duncan Thomson was born in 1898 in Orillia, Simcoe, Ontario, Canada, the child of duncan cameron thomson and nellie gertrude passmore. In 1901, Robert Duncan Thomson resided in Ontario, Canada. In 1911, Robert Duncan Thomson resided in Simcoe, Ontario, Canada. Robert Duncan Thomson married helen beatrice dryden, and had children including carol elizabeth harriett thomson, dorothy jane thomson, duncan dryden thomson, ethel beatrice thomson, mary yvonne yvonne thomson, robert kent thomson. Robert Duncan Thomson passed away in 1973 in Streetsville, Peel, Ontario, Canada.

Sources

  1. 1
    Census 1901 Census of Canada

  2. 2
    Census 1911 Census of Canada

  3. 3
    Census 1921 Census of Canada

  4. 4
    Military Canada, World War I CEF Attestation Papers, 1914-1918

  5. 5
    Burial Records Web: Canada, GenWeb Cemetery Index, 1800-2011

  6. 6
    Burial Records Canada, Find a Grave Index

  7. 7
    Record Ontario, Canada Births

  8. 8
    Military Canada, World War i CEF Personnel Files

  9. 9
    Record Canada, Certificates of Military Instruction, 1867-1932

  10. 10
    Record Ontario, Canada, Marriages, 1801-1928, 1933-1934

Life Timeline

1898
Birth of Robert Duncan Thomson in Orillia, Simcoe, Ontario, Canada
Birth
1901
Robert Duncan Thomson resided here in Ontario, Canada
Residence
1911
Robert Duncan Thomson resided here in Simcoe, Ontario, Canada
Residence
1921
Robert Duncan Thomson resided here in Orillia, Simcoe, Ontario, Canada
Residence
1928
Robert Duncan Thomson resided here
Residence
1973
Death of Robert Duncan Thomson in Streetsville, Peel, Ontario, Canada
Death

Oldest Ancestor Line from Robert Thomson

This ancestor line traces from Canongate, Midlothian, Scotland (1619) to Orillia, Simcoe, Ontario, Canada (1898) across 11 generations.

Direct Lineage
generations

Frequently Asked Questions

Robert Thomson (1898–1973) was born in Orillia, Simcoe, Ontario, Canada and died in Streetsville, Peel, Ontario, Canada. 2 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 (A) based on cross-tree validation.
Right now, 2 researchers on YourRoots have Robert 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 11 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

Duncan Cameron Thomson
Father
Nellie Gertrude Passmore
Mother

Robert Thomson's Ancestors

Pedigree chart — 3 generations on record

Self
Robert Duncan Thomson PTP
1898–1973
Orillia, Simcoe, Ontario, Canada
Parents
Unknown
Unknown
Grandparents
Unknown
Unknown
Unknown
Unknown

Robert Thomson's Descendants

1.
RT
Robert Duncan Thomson PTP 1898–1973