Mary Quinby (1730–1809) was born in Mamaroneck, Westchester, New York and died in Westchester, New York, USA. 2 researchers on YourRoots have this ancestor in their family trees.

How many people are researching Mary?

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

What records do they have for Mary?

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.

Mary Quinby 1730–1809

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 Mary Quinby 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: July 22, 2026 · Reliability: C — verified across 2 independent trees

Born 5 May 1730 · Mamaroneck, Westchester, New York

Died 29 May 1809 · Westchester, New York, USA

Spouse William Cornell

Children Quinby Cornell

Compare Tree

Researchers connected through Mary Quinby 1730–1809

and 1 more tree owner connected with Mary Quinby 1730–1809

Immediate Family

Parents

Spouse(s)

William Cornell

Children

Quinby Cornell

Biography

Mary Quinby was born in 1730 in Mamaroneck, Westchester, New York. Mary Quinby married william cornell, and had children including quinby cornell. Mary Quinby passed away in 1809 in Westchester, New York, USA.

Sources

Life Timeline

1730

Birth of Mary Quinby in Mamaroneck, Westchester, New York

Birth

1809

Death of Mary Quinby in Westchester, New York, USA

Death

Oldest Ancestor Line from Mary Quinby

Direct Lineage

generations

Frequently Asked Questions

: Mary Quinby (1730–1809) was born in Mamaroneck, Westchester, New York and died in Westchester, New York, USA. 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 Mary 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

Quinby US Census Records

Browse all census records

Mary Quinby's Ancestors

Pedigree chart — 3 generations on record

Self

Mary Quinby PTP

1730–1809

Mamaroneck, Westchester, New York