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Mary Brennan — 1920 US Census Record
Linked across censuses1920 United States Federal Census · New York, New York
Our Model Tree links this Mary Brennan across the 1910 and 1920 US Censuses in New York, New York (XGBoost, ~Confirmed) — first a daughter (b.~1907), then head of a 17-person household.
Age 13
b. ~1907
Female
Daughter
Born: New York
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | New York, New York |
| Surname | Brennan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Township / Ward | New York City |
| Est. Birth Year | ~1907 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
17 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Brennan | Daughter | — | 13 | ~1907 |
| Cecelia Brennan | Daughter | — | 14 | ~1906 |
| Catherine Brennan | Daughter | — | 11 | ~1909 |
| Alice Brennan | Daughter | — | 12 | ~1908 |
| Helen Brennan | Daughter | — | 5 | ~1915 |
| Anna Brennan | Daughter | — | 7 | ~1913 |
| James Brennan | Head | — | 41 | ~1879 |
| William Brennan | Son | — | 6 | ~1914 |
| Robert Brennan | Son | — | 10 | ~1910 |
| Thomas Brennan | Son | — | 9 | ~1911 |
| Edward Brennan | Son | — | 4 | ~1916 |
| Viola Brennan | Son | — | 3 | ~1917 |
| John Brennan | Son | — | 8 | ~1912 |
| James Brennan | Son | — | 15 | ~1905 |
| Eugene Brennan | Son | — | 2 | ~1918 |
| Harold Brennan | Son | — | 1 | ~1919 |
| Annie Brennan | Spouse | — | 41 | ~1879 |
Census Appearances
1910
New York, …
Daughter, age 2
New York, New York · implied b. ~1908 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1920
New York, …
Daughter, age 13
New York, New York · implied b. ~1907 — 17 household members
| Surname | Brennan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Mary Brennan across 2 US Census years (1910 and 1920) in New York, New York, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Brennan
Daughter · 1920 · age 13 · b. ~1907 · New York
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Sibling
Alice Brennan
Sibling · 1920 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Viola Brennan
Sibling · 1920 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Brennan
Sibling · 1920 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Brennan
Sibling · 1920 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Brennan
Sibling · 1920 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Brennan
Sibling · 1920 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Brennan
Sibling · 1920 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Brennan
Sibling · 1920 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Brennan
Sibling · 1920 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Brennan
Sibling · 1920 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cecelia Brennan
Sibling · 1920 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harold Brennan
Sibling · 1920 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Brennan
Sibling · 1920 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Brennan
Sibling · 1920 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — New York, New York
Open full size
1920 US Federal Census — New York, New York
Page Contents
31 people indexed on this census page (ia:1920:14thcensusofpopu1281unit:0334)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 20 | James Brennan | 41 | Head | Laborer | Ireland |
| 21 | Annie Brennan | 41 | Wife | — | Ireland |
| 22 | James Brennan | 15 | Son | — | New York |
| 23 | Mary Brennan THIS PERSON | 13 | Daughter | — | New York |
| 24 | Catherine Brennan | 11 | Daughter | — | New York |
| 25 | John Brennan | 8 | Son | — | New York |
| 26 | William Brennan | 6 | Son | — | New York |
| 27 | Edward Brennan | 4 | Son | — | New York |
| 28 | Eugene Brennan | 2 | Son | — | New York |
| 29 | Harold Brennan | 1 | Son | — | New York |
| 30 | Cecelia Brennan | 14 | Daughter | — | New York |
| 31 | Alice Brennan | 12 | Daughter | — | New York |
| 32 | Robert Brennan | 10 | Son | — | New York |
| 33 | Thomas Brennan | 9 | Son | — | New York |
| 34 | Anna M. Brennan | 7 | Daughter | — | New York |
| 35 | Helen Brennan | 5 | Daughter | — | New York |
| 36 | Viola L. Brennan | 3 | Son | — | New York |
| 37 | Frederick Koenig | 34 | Head | Laborer | New York |
| 38 | Mary Koenig | 32 | Wife | — | New York |
| 39 | Harry Nelkin | 54 | Head | Merchant | Russia |
| 40 | Rose Nelkin | 51 | Wife | Saleslady | Russia |
| 41 | Walter Nelkin | 21 | Son | Foreman | New York |
| 42 | Sarah Adelman | 25 | Boarder | — | Russia |
| 43 | Michael Bradley | 38 | Head | Laborer | Ireland |
| 44 | Mary Bradley | 34 | Wife | — | Ireland |
| 45 | Mary J. Bradley | 7 | Daughter | — | New York |
| 46 | Catherine Bradley | 1 | Daughter | — | New York |
| 47 | James B. Raleigh | 43 | Boarder | — | Ireland |
| 48 | Gustave Eberhardt | 40 | Head | Clerk | Germany |
| 49 | Lillian Eberhardt | 37 | Wife | — | New York |
| 50 | Eberhardt | None | — | — | — |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)