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William Marshall 1146–1219

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 4 independent trees
Birth year and location consistent across 4 trees
Death year and location consistent across 4 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

4 researchers on YourRoots have William Marshall in their family trees — each with their own records and documentation. Trace the migration path across 5 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 4 independent trees

Born 12 MAY 1146 · Pembroke, Pembrokeshire, Wales
Died 14 MAY 1219 · Caversham Manor, England
Spouse Isabel Fitzgilbert De Clare
Children Sibyl Marshall

Researchers connected through William Marshall 1146–1219

and 3 more tree owners connected with William Marshall 1146–1219

Immediate Family

Biography

The story of William Marshall began in 1146 in Pembroke, Pembrokeshire, Wales. William Marshall married isabel fitzgilbert de clare, and had children including sibyl marshall. William Marshall passed away in 1219 in Caversham Manor, England.

Sources

Life Timeline

1146
Birth of William Marshall in Pembroke, Pembrokeshire, Wales
Birth
1219
Death of William Marshall in Caversham Manor, England
Death

Oldest Ancestor Line from William Marshall

This ancestor line traces from Of St Symphoro, Lamans, MAINE, France (1000) to Pembroke, Pembrokeshire, Wales (1146) across 5 generations.

Direct Lineage
generations

Frequently Asked Questions

William Marshall (1146–1219) was born in Pembroke, Pembrokeshire, Wales and died in Caversham Manor, England. 4 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, 4 researchers on YourRoots have William 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 5 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.

William Marshall's Ancestors

Pedigree chart — 3 generations on record

Self
William Marshall PTP
1146–1219
Pembroke, Pembrokeshire, Wales
Parents
Unknown
Unknown
Grandparents
Unknown
Unknown
Unknown
Unknown

William Marshall's Descendants

1.
WM
William Marshall PTP 1146–1219