YourRoots Logo
Sign up free
banner

Sign up to explore more

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

Sign up free

William (Gov of Athlone) Mostyn** 11th GGF 1555 – 1576 – Genealogical Records

Birth Date: 1555

Birth Location: Ireland

Death Date: Abt 1576

Death Location: Ireland

Father: Captain Athlone

Mother: Sile GGM

Spouse(s):

Children(s): Dorothy Mostyn

The story of William (Gov of Athlone) Mostyn** 11th GGF began in 1555 in Ireland. William (Gov of Athlone) Mostyn** 11th GGF had children including Dorothy Mostyn. William (Gov of Athlone) Mostyn** 11th GGF passed away in 1576 in Ireland.

Find more search results for William GGF
WG

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:
C
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

  • The story of William (Gov of Athlone) Mostyn** 11th GGF began in 1555 in Ireland.
  • William (Gov of Athlone) Mostyn** 11th GGF had children including Dorothy Mostyn.
  • William (Gov of Athlone) Mostyn** 11th GGF passed away in 1576 in Ireland.

Immediate Family

Parents

Spouses(s)

Children(s)

William GGF's Ancestors

Self
William GGF
1555 – 1576
Birth Place: Ireland
Parents
Captain Robert Mostyn Athlone
1528 – 1606
Mostyn, Chwitffordd, Flintshire, Clwyd, Wales, United Kingdom
Sile (O'Melaghlin** 12th) GGM
1530 –
Ireland
Grandparents
Sir (Pyers William Thomas Richard) Mostyn
1500 – 1558
Talacre, Flintshire, Clwyd, Wales, United Kingdom
Lady (Jane) Griffith
1502 – 1572
of, Port Penrhyn, Llandygái, Caernarvonshire, Wales
Felim ((Phelim) O'Melaghlin**) 13thGGF
1510 – 1542
Ireland, Ireland
Great-Grandparents
2nd-Great-Grandparents

William GGF's Descendants

1.
WG
William ((Gov of Athlone) Mostyn** 11th) GGF (1555 – Abt 1576)
  1. 1. Dorothy Mostyn (1572 – 16 August 1666) m. John O'Donelan (1585 – ABT APR 1655)
    1. 1. Malachy (Loughlin) O'Connor (1641 – 1677)
      1. 1. Captain (Dermot (Darby) O'Conor Sylan** 9th) GGF (Unknown – October 1691)
        1. 1. Bryan (O') Connor (Abt 1540 – Abt 1600) m. Norah Brosnan (1543 – 1575)

William GGF's Timeline

2 Records

1555
1555
Birth of William (Gov of Athlone) Mostyn** 11th GGF in Ireland
Ireland
1576
Abt 1576
Age 21
Death of William (Gov of Athlone) Mostyn** 11th GGF in Ireland
Ireland

Sources

    Genealogy Event 1
    Event Type: Birth
    Event Date: 1555
    Event Place: Ireland

    Genealogy Event 2
    Event Type: Death
    Event Date: Abt 1576
    Event Place: Ireland

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