Who was John O'Sullivan?

John O'Sullivan (1901–1979) was born in Toowoomba, Queensland, Australia and died in Cairns, Queensland, Australia. 2 researchers on YourRoots have this ancestor in their family trees.

How many people are researching John?

Right now, 2 researchers on YourRoots have John in their trees. The ancestor migration map traces 1 generations of this lineage.

What records do they have for John?

Records vary by researcher and can include census, vital, parish, cemetery, and family sources.

How do I compare family trees?

Use Compare Tree on an available researcher profile to compare overlapping people and records.

John Michael O'Sullivan 1901–1979

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.

C Reliability

Reliability Score: C

Basic — 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 John O'Sullivan in their family trees — each with their own records and documentation. Trace the migration path across 1 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: C — verified across 2 independent trees

Born 21 Sep 1901 · Toowoomba, Queensland, Australia

Died 20 Nov 1979 · Cairns, Queensland, Australia

Spouse Ellen Elizabeth Nell Hannam

Children Doreen Patricia O Sullivan

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Researchers connected through John O'Sullivan 1901–1979

Immediate Family

Parents

Spouse(s)

Ellen Elizabeth Nell Hannam

Children

Doreen Patricia O Sullivan

Biography

In 1901, John Michael O'Sullivan entered the world in Toowoomba, Queensland, Australia. John Michael O'Sullivan married ellen elizabeth nell hannam, and had children including doreen patricia o sullivan. John Michael O'Sullivan passed away in 1979 in Cairns, Queensland, Australia.

Sources

Life Timeline

1901

Birth of John Michael O'Sullivan in Toowoomba, Queensland, Australia

Birth

1979

Death of John Michael O'Sullivan in Cairns, Queensland, Australia

Death

Oldest Ancestor Line from John O'Sullivan

Direct Lineage

generations

Frequently Asked Questions

: John O'Sullivan (1901–1979) was born in Toowoomba, Queensland, Australia and died in Cairns, Queensland, Australia. 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 (C) based on cross-tree validation.
: Right now, 2 researchers on YourRoots have John 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 1 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

John O'Sullivan's Ancestors

Pedigree chart — 3 generations on record

Self

John Michael O'Sullivan PTP

1901–1979

Toowoomba, Queensland, Australia