MR
Mary Reardon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Mary Reardon across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1919), then head of a 9-person household.
Age 21
b. ~1919
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Reardon |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Occupation | Maid |
| Industry | Hotel |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 260 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Maid |
| Township / Ward | Philadelphia |
| 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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Anna Reardon | Daughter | — | 9 | ~1931 |
| Mary Reardon | Daughter | — | 21 | ~1919 |
| Michael Reardon | Son | — | 8 | ~1932 |
| James Reardon | Son | — | 6 | ~1934 |
| Frances Reardon | Daughter | — | 17 | ~1923 |
| Ella Reardon | Head | — | 23 | ~1917 |
| Thomas Reardon | Son | — | 14 | ~1926 |
| Audrey Reardon | Daughter | — | 16 | ~1924 |
| Essie Reardon | Daughter | — | 10 | ~1930 |
Census Appearances
1930
Philadelphia, Pennsylvania
Daughter, age 12
Philadelphia, Pennsylvania · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Reardon |
| Given Name | Margaret |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Daughter, age 21
Philadelphia-County, Pennsylvania · implied b. ~1919 — 9 household members
| Surname | Reardon |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Occupation | Maid |
| Industry | Hotel |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 260 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Reardon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Reardon
Daughter · 1940 · age 21 · b. ~1919 · Pennsylvania
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Sibling
James Reardon
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Michael Reardon
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Reardon
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Audrey Reardon
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Reardon
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Essie Reardon
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Reardon
Sibling · 1940 · age 14
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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03708-00437)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ella Reardon | 23 | Head | Maid | Pennsylvania |
| 42 | Mary Reardon THIS PERSON | 21 | Daughter | Maid | Pennsylvania |
| 43 | Frances Reardon | 17 | Daughter | — | Pennsylvania |
| 44 | Audrey Reardon | 16 | Daughter | — | Pennsylvania |
| 45 | Thomas Jr Reardon | 14 | Son | — | Pennsylvania |
| 46 | Essie Reardon | 10 | Daughter | — | Pennsylvania |
| 47 | Anna Reardon | 9 | Daughter | — | Pennsylvania |
| 48 | Michael Reardon | 8 | Son | — | Pennsylvania |
| 49 | James Reardon | 6 | Son | — | Pennsylvania |
| 50 | Nelson Tate | 32 | Head | Presser | Pennsylvania |
| 51 | Lucille Tate | 34 | Wife | — | West Virginia |
| 52 | Sylvester Lemon | 32 | Lodger | Waiter | Georgia |
| 53 | Augusta Jackson | 59 | Head | Laborer | Illinois |
| 54 | Lula Jackson | 53 | Wife | — | Virginia |
| 55 | Pearl Simmons | 22 | Foster Daughter | — | Georgia |
| 56 | Doris Greenley | 14 | Foster Daughter | — | Pennsylvania |
| 57 | Ronald Kinsey | 2 | Foster Son | — | Pennsylvania |
| 58 | Joseph Coast | 39 | Head | Tailor | South Carolina |
| 59 | Minnie Coast | 28 | Wife | Tailor | Virginia |
| 60 | Mildred Coast | 14 | Daughter | — | Pennsylvania |
| 61 | Joseph Jr Coast | 13 | Son | — | Pennsylvania |
| 62 | Fannie Coast | 10 | Daughter | — | Pennsylvania |
| 63 | Hope Coast | 7 | Daughter | — | Pennsylvania |
| 64 | James Cowan | 32 | Head | Janitor | Georgia |
| 65 | Lillian Cowan | 31 | Wife | — | North Carolina |
| 66 | Mary Cowan | 12 | Daughter | — | Pennsylvania |
| 67 | James Jr Cowan | 11 | Son | — | Pennsylvania |
| 68 | Josephine F Cowan | 9 | Daughter | — | Pennsylvania |
| 69 | Frank E Cowan | 6 | Son | — | Pennsylvania |
| 70 | David W Cowan | 5 | Son | — | Pennsylvania |
| 71 | George F Cowan | 3 | Son | — | Pennsylvania |
| 72 | Anna Booker | 45 | Head | — | North Carolina |
| 73 | Mildred Booker | 18 | Daughter | — | North Carolina |
| 74 | Peter Booker | 14 | Son | — | Pennsylvania |
| 75 | Anna Booker | 13 | Daughter | — | Pennsylvania |
| 76 | Helen Booker | 12 | Daughter | — | Pennsylvania |
| 77 | Josephine Booker | 7 | Daughter | — | Pennsylvania |
| 78 | Roberta Booker | 2 | Daughter | — | Pennsylvania |
| 79 | Shelton Black | 39 | Head | Mason | South Carolina |
| 80 | Addie Black | 36 | Wife | — | South Carolina |
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)