MF
Mary Farrell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Chester-County, Pennsylvania
Our Model Tree links this Mary Farrell across the 1920, 1930 and 1940 US Censuses in Chester-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1866), then head of a 5-person household.
Age 74
b. ~1866
Female
Spouse
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Chester-County, Pennsylvania |
| Surname | Farrell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 74 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Phoenixville |
| 1935 Residence (County) | Chester |
| Naturalization Status | Naturalized |
| Additional Details | |
| Hours Worked | 5 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Phoenixville |
| Est. Birth Year | ~1866 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Anne Zalenski | Daughter | — | 32 | ~1908 |
| Joseph Farrell | Head | — | 75 | ~1865 |
| Louis Zalenski | Other | — | 31 | ~1909 |
| Dolores Zalenski | Other | — | 6 | ~1934 |
| Mary Farrell | Spouse | — | 74 | ~1866 |
Census Appearances
1920
Philadelphia, Pennsylvania
Spouse, age 54
Philadelphia, Pennsylvania · implied b. ~1866 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Farrell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1892 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1915 |
| Birthplace (normalized) | ireland |
1930
Philadelphia, Pennsylvania
Spouse, age 65
Philadelphia, Pennsylvania · implied b. ~1865 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Farrell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1892 |
| Age at First Marriage | 26 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Chester-County, Pennsylvania
Spouse, age 74
Chester-County, Pennsylvania · implied b. ~1866 — 5 household members
| Surname | Farrell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 74 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Phoenixville |
| 1935 Residence (County) | Chester |
| Naturalization Status | Naturalized |
| Hours Worked | 5 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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.
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This person
Anchor record
Mary Farrell
Spouse · 1940 · age 74 · b. ~1866 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Chester-County, Pennsylvania
Open full size
1940 US Federal Census — Chester-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03466-00242)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Saffie Little | 44 | Wife | — | Pennsylvania |
| 2 | Pasquale Little | 4 | Son | — | Pennsylvania |
| 3 | Joseph Little | 2 | Son | — | Pennsylvania |
| 4 | Margaret Mary Little | 0 | Daughter | — | Pennsylvania |
| 5 | Joseph Farrell | 75 | Head | — | Ireland |
| 6 | Mary Farrell THIS PERSON | 74 | Wife | — | Ireland |
| 7 | Anne Zalenski | 32 | Daughter | Tapper | Pennsylvania |
| 8 | Louis Zalenski | 31 | Son-in-law | Knitter | Pennsylvania |
| 9 | Dolores Zalenski | 6 | Granddaughter | — | Pennsylvania |
| 10 | Andrew Grabovsky | 53 | Head | Laborer | Poland |
| 11 | Anastasia Grabovsky | 50 | Wife | — | Poland |
| 12 | Catherine Grabovsky | 17 | Daughter | Packer | Pennsylvania |
| 13 | Joseph Grabovsky | 16 | Son | — | Pennsylvania |
| 14 | Margaret Grabovsky | 14 | Daughter | — | Pennsylvania |
| 15 | John Grabovsky | 13 | Son | — | Pennsylvania |
| 16 | Peter Swartz | 44 | Head | Filling Station | Poland |
| 17 | Mary Swartz | 37 | Wife | Laborer | Pennsylvania |
| 18 | Agnes Swartz | 16 | Daughter | Laborer | Pennsylvania |
| 19 | Josephine Swartz | 15 | Daughter | Packer | Pennsylvania |
| 20 | Thomas Swartz | 10 | Son | — | Pennsylvania |
| 21 | Stephen Lopinski | 42 | Head | Laborer | Pennsylvania |
| 22 | Cecelia Lopinski | 40 | Wife | Laborer | Pennsylvania |
| 23 | Francis Lopinski | 20 | Son | — | Pennsylvania |
| 24 | Peter Hromiak | 27 | Head | Grocery Clerk | Pennsylvania |
| 25 | Mary Hromiak | 25 | Wife | Supervisor | Pennsylvania |
| 26 | Joseph Hromiak | 8 | Son | — | Pennsylvania |
| 27 | Eugene Hromiak | 5 | Son | — | Pennsylvania |
| 28 | Nicholas Stafnoski | 61 | Head | Laborer | Poland |
| 29 | Mary Stafnoski | 57 | Wife | — | Austria |
| 30 | Ignatius Stafnoski | 31 | Son | Officer | Pennsylvania |
| 31 | Michael Stafnoski | 21 | Son | Laborer | Pennsylvania |
| 32 | John Stafnoski | 16 | Son | — | Pennsylvania |
| 33 | James Amadio | 45 | Head | Shoemaker | Italy |
| 34 | Josephine Amadio | 45 | Wife | — | Italy |
| 35 | Nicholas Amadio | 21 | Son | Clerk | Pennsylvania |
| 36 | Dominick Amadio | 20 | Son | Laborer | Pennsylvania |
| 37 | Mary Amadio | 18 | Daughter | Laborer | Pennsylvania |
| 38 | Caroline Amadio | 12 | Daughter | Dress Maker | Pennsylvania |
| 39 | Nancy Amadio | 12 | Daughter | — | Pennsylvania |
| 40 | Louis Amadio | 4 | Son | — | Pennsylvania |
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)