YourRoots by Genomelink
banner

Sign up to explore more

Create a free account to navigate family trees, view ancestors, and discover connections.

William I DeFerrers Earl of Derby 1135–1189 – Genealogical Records

Birth Date: 1135

Birth Location: Rutland, England

Death Date: 31 Dec 1189

Death Location: Battle of Acre, Lestine, Israel

Father: Robert Derby

Mother: Margaret Peverel

Spouse(s): Sybil DeBraose

Children(s): Elizabeth DeFerrers

In 1135, William I DeFerrers Earl of Derby entered the world in Rutland, England, born to Robert Deferrers Earl Of Derby And Margaret Peverel. William I DeFerrers Earl of Derby married Sybil Debraose, and had children including Elizabeth Deferrers. William I DeFerrers Earl of Derby passed away in 1189 in Battle of Acre, Lestine, Israel.

Find more search results for William Derby
WD

Reliability Score

This score reflects the reliability of the source family tree. A high rating indicates a trustworthy source with strong data consistency.

Reliability Score:
B
Criteria:
  • A 3 criteria (Strong)
  • B 2 criteria (Medium)
  • C 1 criteria (Basic)
  • N/A 0 criteria (Insufficient)

This tree's reliability score:

  • Record available
  • Descendant's record available
  • Star tree owner

Biography

  • In 1135, William I DeFerrers Earl of Derby entered the world in Rutland, England, born to Robert Deferrers Earl Of Derby And Margaret Peverel.
  • William I DeFerrers Earl of Derby married Sybil Debraose, and had children including Elizabeth Deferrers.
  • William I DeFerrers Earl of Derby passed away in 1189 in Battle of Acre, Lestine, Israel.

Immediate Family

Parents

Robert Derby
1090–1136
Birth Location: Derbyshire, England
RD
Margaret Peverel
1114–1140
Birth Location: Notts, of Notts, England
MP

Spouses(s)

Sybil DeBraose
1145–1227
Birth Location: Bramber, Sussex, England
SD

Children(s)

Elizabeth DeFerrers
1166–1252
Birth Location: Tutbury, Staffordshire, England
ED

William Derby's Ancestors

Self
William Derby
1135–1189
Birth Place: Rutland, England
Parents
Robert DeFerrers Earl of Derby
1090–1136
Derbyshire, England
Margaret Peverel
1114–1140
Notts, of Notts, England
Grandparents
Great-Grandparents
2nd-Great-Grandparents

William Derby's Descendants

1.
WD
William (I DeFerrers Earl of) Derby (1135–31 Dec 1189) m. Sybil DeBraose (1145–5 Feb 1227)
  1. 1. Elizabeth DeFerrers 1166–1252 m. Roger DeMortimer 1158–1214
    1. 1. Juliana deMortimer 1184–1197 m. Cynfelyn (Ap Dolphin of Manofon) Cynfelyn 1170–1197
      1. 1. Alswn (Ferch) Cynfelyn –1288 m. Celynin (Ap) Rhirid 1240–1292
        1. 1. Einion ApCelynin 1284–1340 m. Gwenllian (Verch) Adda 1285–1333

William Derby's Timeline

2 Records

1135
1135
Birth of William I DeFerrers Earl of Derby in Rutland, England
Rutland, England
1189
31 Dec 1189
Age 54
Death of William I DeFerrers Earl of Derby in Battle of Acre, Lestine, Israel
Battle of Acre, Lestine, Israel

Sources

    Genealogy Event 1
    Event Type: Birth
    Event Date: 1135
    Event Place: Rutland, England
    Record Source: Millennium File

    Genealogy Event 2
    Event Type: Death
    Event Date: 31 Dec 1189
    Event Place: Battle of Acre, Lestine, Israel
    Record Source: Millennium File
Find more search results for William Derby

About YourRoots

Family Tree Map

Explore your family tree geographically

Import your GEDCOM file to transform your family tree into an interactive global map. See your roots laid out visually and understand your true geographic heritage.

Powerful tools like "Trace Back To Me" instantly map your family's migration paths from a chosen ancestor all the way back to you.

LEARN MORE
AI Genealogy Research

Discover ancestors beyond "end-of-line" automatically

Import your family tree and let AI expand it for you. AI Ancestor Finder scans "end-of-line" ancestors to uncover their parents across hundreds of family lines at once. AI Deep Research analyzes selected ancestors and family clusters, suggesting relevant records and next steps.

Turn on Auto Research Mode to get new discoveries daily or weekly, so your tree keeps growing even while you're away.

LEARN MORE
DNA Match

Find more DNA matches across all DNA tests

Combine your DNA data with your family tree to unlock the full power of YourRoots DNA Match. Connect with relatives across major testing services — Ancestry, 23andMe, MyHeritage, and more.

View your matches' maps and trees to identify shared ancestors, and soon you'll be able to add them directly to your own tree and map.

LEARN MORE
Ancestry Reports

Ancestry DNA analysis that goes deeper than others

Unlock exclusive reports that reveal your deeper origins.

  • Deep Ancestry Report — Analyze 130+ ethnicities, sub-regions, and 1,800+ communities in one detailed view.
  • Global & Native American Reports — Developed with Stanford researchers to uncover hidden ancestries across all 22 chromosomes.
  • Ancient DNA Series — Compare your DNA with 1,000+ ancient genomes from Viking, Celtic, and early American civilizations.
LEARN MORE