MF
Mary Farrell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this Mary Farrell across the 1920, 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed), with identified parents James & Christina — first a daughter (b.~1919), then head of a 7-person household.
Age 21
b. ~1919
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Farrell |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Occupation | Clerk |
| Industry | Statistics |
| Class of Worker | PW |
| Hours Worked | 40 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Clerk |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1919 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Margaret Farrell | Daughter | — | 24 | ~1916 |
| Ellen Farrell | Daughter | — | 18 | ~1922 |
| Christina Farrell | Daughter | — | 16 | ~1924 |
| Mary Farrell | Daughter | — | 21 | ~1919 |
| James Farrell | Head | — | 62 | ~1878 |
| Philip Farrell | Son | — | 27 | ~1913 |
| Christina Farrell | Spouse | — | 56 | ~1884 |
Census Appearances
1920
Hudson, New …
Daughter, age
Hudson, New Jersey · implied b. ~1920 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Farrell |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Daughter, age 11
Hudson, New Jersey · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Farrell |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Daughter, age 21
Hudson-County, New Jersey · implied b. ~1919 — 7 household members
| Surname | Farrell |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Occupation | Clerk |
| Industry | Statistics |
| Class of Worker | PW |
| Hours Worked | 40 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 Farrell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Farrell (~0.92 confidence) and mother Christina Farrell (~0.92 confidence) and father John Farrell (~0.92 confidence) and mother Alice Farrell (~0.92 confidence) and father James Farrell (~0.92 confidence) and mother Anna Farrell (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Farrell
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Christina Farrell
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
John Farrell
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Alice Farrell
b. ~1892
Source mother
● Household
· direct · ~0.92
Father
James Farrell
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Anna Farrell
b. ~1896
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Farrell
Daughter · 1940 · age 21 · b. ~1919 · New Jersey
★ You are viewing this record
Sibling
Christina Farrell
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Philip Farrell
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Farrell
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ellen Farrell
Sibling · 1940 · age 18
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
1940 US Federal Census — Hudson-County, New Jersey
Open full size
1940 US Federal Census — Hudson-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02405-00406)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph Smith | 52 | Head | Painter | Mass. |
| 2 | Annie Smith | 54 | Wife | — | New Jersey |
| 3 | Peter Smith | 3 | Son | — | — |
| 4 | Anne Dodge | 41 | Lodger | Scrubwoman | New Jersey |
| 5 | Ruth Smith | 62 | Sister-in-law | — | New Jersey |
| 6 | Fred Rupp | 40 | Head | Pipefitter | New Jersey |
| 7 | Sylvia Rupp | 36 | Wife | — | New Jersey |
| 8 | Freddie Rupp | 12 | Son | — | New Jersey |
| 9 | Ruth Rupp | 9 | Daughter | — | New Jersey |
| 10 | Harold Haines | 37 | Head | Butcher-Helper | New Jersey |
| 11 | Alice Haines | 31 | Wife | — | New Jersey |
| 12 | Rita Haines | 10 | Daughter | — | New Jersey |
| 13 | Henry Peterson | 48 | Head | Painter | Sweden |
| 14 | Marie Peterson | 38 | Wife | — | New Jersey |
| 15 | Frank Rontischi | 58 | Head | Coal Dealer | Italy |
| 16 | Dominica Rontischi | 47 | Wife | — | Italy |
| 17 | Dominica Rontischi | 27 | Daughter | Bead Worker | New Jersey |
| 18 | Alex Rontischi | 27 | Son | Assembler | New Jersey |
| 19 | William Rontischi | 25 | Son | Packer | New Jersey |
| 20 | Pauline Rontischi | 25 | Daughter | — | New Jersey |
| 21 | Angelo Rontischi | 24 | Son | Bead Worker | New Jersey |
| 22 | Mary Rontischi | 22 | Daughter | Mach Oper | New Jersey |
| 23 | Leonard Rontischi | 20 | Son | Painter | New Jersey |
| 24 | Domenick Rontischi | 19 | Son | Printer Helper | New Jersey |
| 25 | Angelina Rontischi | 18 | Daughter | — | New Jersey |
| 26 | Michael Rontischi | 13 | Son | — | New Jersey |
| 27 | Frank Rontischi | 11 | Son | — | New Jersey |
| 28 | Antoinette Rontischi | 7 | Daughter | — | New Jersey |
| 29 | James Farrell | 62 | Head | Electrician | Eire |
| 30 | Christina Farrell | 56 | Wife | — | Eire |
| 31 | Philip Farrell | 27 | Son | Librarian | New Jersey |
| 32 | Margaret Farrell | 24 | Daughter | Clerk | New Jersey |
| 33 | Mary Farrell THIS PERSON | 21 | Daughter | Clerk | New Jersey |
| 34 | Ellen Farrell | 18 | Daughter | — | New Jersey |
| 35 | Christina Farrell | 16 | Daughter | — | New Jersey |
| 36 | Jenny Pittaro | 75 | Head | — | Italy |
| 37 | Michael J. Pittaro | 53 | Son | Musician | New York |
| 38 | John Pittaro | 41 | Son | Musician | New York |
| 39 | John Timmerman | 33 | Head | Pipefitter | New Jersey |
| 40 | Josephine Timmerman | 32 | Wife | — | New Jersey |
Pedigree Summary
Mary + 4 siblings
Gen 1 · 6 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)