MC
Mary Conroy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this Mary Conroy across the 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 8-person household.
Age 14
b. ~1926
Female
Daughter
Born: Penna
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Conroy |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Penna |
| 1935 Residence (City) | Haverford |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
| Township / Ward | Haverford |
| Est. Birth Year | ~1926 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Susan Conroy | Spouse | — | 35 | ~1905 |
| Joseph Conroy | Head | — | 35 | ~1905 |
| Agnes Conroy | Daughter | — | 4 | ~1936 |
| John Conroy | Son | — | 12 | ~1928 |
| Francis Conroy | Son | — | 9 | ~1931 |
| Mary Conroy | Daughter | — | 14 | ~1926 |
| Elizabeth Conroy | Daughter | — | 6 | ~1934 |
| Joseph Conroy | Son | — | 16 | ~1924 |
Census Appearances
1930
Philadelphia, Pennsylvania
Daughter, age 4
Philadelphia, Pennsylvania · implied b. ~1926 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Conroy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Penna |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1940
Delaware-County, Pennsylvania
Daughter, age 14
Delaware-County, Pennsylvania · implied b. ~1926 — 8 household members
| Surname | Conroy |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Penna |
| 1935 Residence (City) | Haverford |
| 1935 Residence (County) | Delaware |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
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 Conroy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Conroy
Daughter · 1940 · age 14 · b. ~1926 · Pennsylvania
★ You are viewing this record
Sibling
Elizabeth Conroy
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Conroy
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Conroy
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Conroy
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Conroy
Sibling · 1940 · age 9
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 — 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-t0627-03492-00112)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert C. Compton | 23 | Head | Apprentice | Penna |
| 42 | Karl Hingelmann | 37 | Head | Butcher | Germany |
| 43 | Anna D. Hingelmann | 35 | Wife | — | Germany |
| 44 | Lottie Hingelmann | 16 | Daughter | — | Germany |
| 45 | Karl Hingelmann | 11 | Son | — | Penna |
| 46 | John Grady | 40 | Head | Labor Foreman | Massachusetts |
| 47 | Theresa D. Grady | 38 | Wife | — | Penna |
| 48 | John Jr. Grady | 13 | Son | — | Penna |
| 49 | William Grady | 12 | Son | — | Penna |
| 50 | Jean Grady | 7 | Daughter | — | Penna |
| 51 | Francis Grady | 8 | Son | — | Penna |
| 52 | Nancy Grady | 3 | Daughter | — | Penna |
| 53 | Henry Dowdell | 59 | Head | — | Penna |
| 54 | Mary D. Dowdell | 54 | Wife | — | Penna |
| 55 | Walter Albany | 32 | Head | Mechanic | Penna |
| 56 | Margaret D. Albany | 29 | Wife | — | Penna |
| 57 | Dorothy Ann Albany | 8 | Daughter | — | Penna |
| 58 | Donald T. Albany | 6 | Son | — | Penna |
| 59 | Nancy M. Albany | 4 | Daughter | — | Penna |
| 60 | Marian D. King | 45 | Head | — | Penna |
| 61 | Elizabeth King | 19 | Daughter | Nurse | Penna |
| 62 | William King | 17 | Son | — | Penna |
| 63 | Ethel King | 16 | Daughter | House Work | Penna |
| 64 | Helen King | 15 | Daughter | — | Penna |
| 65 | Christine King | 12 | Daughter | — | Penna |
| 66 | Joseph T. Conroy | 35 | Head | Gardener | Penna |
| 67 | Susan J. D. Conroy | 35 | Wife | — | Eire |
| 68 | Joseph T. Jr. Conroy | 16 | Son | — | Penna |
| 69 | Mary J. Conroy THIS PERSON | 14 | Daughter | — | Penna |
| 70 | John P. Conroy | 12 | Son | — | Penna |
| 71 | Francis J. Conroy | 9 | Son | — | Penna |
| 72 | Elizabeth R. Conroy | 6 | Daughter | — | Penna |
| 73 | Agnes E. Conroy | 4 | Daughter | — | Penna |
| 74 | Robert Barr | 40 | Head | Air Brakeman | Penna |
| 75 | Dorothy D. Barr | 34 | Wife | — | Penna |
| 76 | Laura Barr | 59 | Mother | — | Penna |
| 77 | Richard Barr | 11 | Son | — | Penna |
| 78 | James Barr | 9 | Son | — | Penna |
| 79 | Betsy Barr | 7 | Daughter | — | Penna |
| 80 | Charles Barr | 3 | Son | — | Penna |
Related Census Records
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)