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Mary Maher — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this Mary Maher across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1877), then head of a 4-person household.
Age 63
b. ~1877
Female
Head
Born: Ireland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Maher |
| Given Name | Mary X. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | Chester City |
| 1935 Residence (County) | Delaware |
| Naturalization Status | Naturalized |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Chester City |
| Est. Birth Year | ~1877 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Maher | Head | — | 63 | ~1877 |
| James Maher | Son | — | 23 | ~1917 |
| Helen Maher | Daughter | — | 20 | ~1920 |
| James Maher | Other | — | 5 | ~1935 |
Census Appearances
1900
Philadelphia, Pennsylvania
Spouse, age 25
Philadelphia, Pennsylvania · implied b. ~1875 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Maher |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Ireland |
| Birth Month | Feb |
| Birth Year | 1875 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Philadelphia, Pennsylvania
Spouse, age 34
Philadelphia, Pennsylvania · implied b. ~1876 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Maher |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 12 |
| Children Born | 7 |
| Children Living | 6 |
| Year of Immigration | 1891 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Philadelphia, Pennsylvania
Spouse, age 44
Philadelphia, Pennsylvania · implied b. ~1876 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Maher |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1891 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth Country | Ireland |
| Year of Naturalization | 1898 |
| Birthplace (normalized) | ireland |
1930
Philadelphia, Pennsylvania
Spouse, age 53
Philadelphia, Pennsylvania · implied b. ~1877 — 30 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Maher |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1894 |
| Age at First Marriage | 21 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Delaware-County, Pennsylvania
Head, age 63
Delaware-County, Pennsylvania · implied b. ~1877 — 4 household members
| Surname | Maher |
| Given Name | Mary X. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | Chester City |
| 1935 Residence (County) | Delaware |
| Naturalization Status | Naturalized |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 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 Maher across 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Maher
Head · 1940 · age 63 · b. ~1877 · Pennsylvania
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03487-00658)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elizabeth Dungan | 15 | Daughter | — | Maryland |
| 2 | Earl Dungan | 12 | Son | — | Maryland |
| 3 | Robert Dungan | 11 | Son | — | Pennsylvania |
| 4 | Francis Caldwell | 34 | Head | Winder | Pennsylvania |
| 5 | Jennie Caldwell | 30 | Wife | — | Pennsylvania |
| 6 | Francis Jr. Caldwell | 6 | Son | — | Pennsylvania |
| 7 | John W. Caldwell | 4 | Son | — | Pennsylvania |
| 8 | Dennis Vereneyock | 58 | Head | Unable Work | Russia |
| 9 | Vera Vereneyock | 45 | Wife | — | Russia |
| 10 | John Vereneyock | 24 | Son | U. S. I. Gas | New Jersey |
| 11 | James Vereneyock | 23 | Son | — | Pennsylvania |
| 12 | Catherine Vereneyock | 22 | Daughter | Clerk | Pennsylvania |
| 13 | Paul Vereneyock | 12 | Son | — | Pennsylvania |
| 14 | James Chavannis | 64 | Lodger | Laborer | Greece |
| 15 | Mary X. Maher THIS PERSON | 63 | Head | — | Ireland |
| 16 | James Maher | 23 | Son | Erector | Pennsylvania |
| 17 | Helen Maher | 20 | Daughter | — | Pennsylvania |
| 18 | James J. Jr. Maher | 5 | Grandson | — | Pennsylvania |
| 19 | Brice Gray | 35 | Head | Laborer | Scotland |
| 20 | Elizabeth Gray | 31 | Wife | — | New York |
| 21 | John Krokenberger | 34 | Head | Sheet Metal W. | Pennsylvania |
| 22 | Pearl Krokenberger | 34 | Wife | — | New Jersey |
| 23 | John Krokenberger | 5 | Son | — | Pennsylvania |
| 24 | Martin J. Strong | 51 | Head | Forger | New Jersey |
| 25 | Harry R. Strong | 25 | Son | Electric Welder | New Jersey |
| 26 | Harry Pollock | 26 | Head | Cap Room Helper | Pennsylvania |
| 27 | Mary X. Pollock | 20 | Wife | — | Pennsylvania |
| 28 | Walter Rupnicki | 43 | Head | Owner | Poland |
| 29 | Walter Rupnicki | 20 | Son | Forestry | Pennsylvania |
| 30 | Stanley Rupnicki | 16 | Son | — | Pennsylvania |
| 31 | Helen Rupnicki | 12 | Daughter | — | Pennsylvania |
| 32 | Charles Gurney | 30 | Head | Welder | New Hampshire |
| 33 | Ann Gurney | 23 | Wife | — | Pennsylvania |
| 34 | Mike Garber | 45 | Lodger | Laborer W.P.A. | Poland |
| 35 | Mildred Garber | 16 | Lodger | — | Connecticut |
| 36 | John Kahny | 45 | Head | Painter | Poland |
| 37 | Mary X. Kahny | 44 | Wife | — | Poland |
| 38 | Harry Kahny | 23 | Son | New Worker | Pennsylvania |
| 39 | Michael Kahny | 21 | Son | Boiler Shop Worker | Michigan |
| 40 | Ludwick Budney | 56 | Head | Boiler Shop Worker | Poland |
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)