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Mary Mcelroy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wayne-County, Michigan
Our Model Tree links this Mary Mcelroy across the 1930 and 1940 US Censuses in Wayne-County, Michigan (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 8-person household.
Age 14
b. ~1926
Female
Daughter
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wayne-County, Michigan |
| Surname | McElroy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Gratiot Township |
| 1935 Residence (County) | Wayne |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Gratiot Township |
| 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 |
|---|---|---|---|---|
| Lawrence Mcelroy | Son | — | 15 | ~1925 |
| Robert Mcelroy | Son | — | 25 | ~1915 |
| Ruby Mcelroy | Daughter | — | 18 | ~1922 |
| Joe Mcelroy | Son | — | 20 | ~1920 |
| Mary Mcelroy | Daughter | — | 14 | ~1926 |
| Helen Mcelroy | Spouse | — | 47 | ~1893 |
| Frances Mcelroy | Daughter | — | 22 | ~1918 |
| Alfred Mcelroy | Head | — | 47 | ~1893 |
Census Appearances
1930
Wayne, Michigan
Daughter, age 4
Wayne, Michigan · implied b. ~1926 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McElroy |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Canada-English |
| Mother's Birthplace | Canada-English |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Wayne-County, Michigan
Daughter, age 14
Wayne-County, Michigan · implied b. ~1926 — 8 household members
| Surname | McElroy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Gratiot Township |
| 1935 Residence (County) | Wayne |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Mcelroy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcelroy
Daughter · 1940 · age 14 · b. ~1926 · Michigan
★ You are viewing this record
Sibling
Lawrence Mcelroy
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruby Mcelroy
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Mcelroy
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joe Mcelroy
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mcelroy
Sibling · 1940 · age 25
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 — Wayne-County, Michigan
Open full size
1940 US Federal Census — Wayne-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01828-00378)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Theodore O. Bruce | 20 | Head | Helper | Michigan |
| 42 | Opal I. Bruce | 19 | Wife | — | Ohio |
| 43 | Theresa M. Bruce | 1 | Daughter | — | Michigan |
| 44 | Calvin A. Lay | 41 | Head | Mechanic | Kentucky |
| 45 | Mary Ruth Lay | 34 | Wife | Sewer | Kentucky |
| 46 | James C. Lay | 18 | Son | — | Kentucky |
| 47 | Winifred Mrs. C. Lay | 70 | Mother-in-law | — | Kentucky |
| 48 | Emil Ricchi | 34 | Head | Spot Welder | Michigan |
| 49 | Grace Ricchi | 29 | Wife | General Girl | Illinois |
| 50 | Arthur Butcher | 37 | Head | Machinist | England |
| 51 | Effie Butcher | 33 | Wife | Punch Press | Michigan |
| 52 | Frances A. Butcher | 13 | Daughter | — | Michigan |
| 53 | Fred A. Soam | 23 | Head | Office Manager | Michigan |
| 54 | Helen L. Soam | 23 | Wife | — | England |
| 55 | Alfred Mcelroy | 47 | Head | Salesman | Michigan |
| 56 | Helen Mcelroy | 47 | Wife | — | Canada |
| 57 | Robert Mcelroy | 25 | Son | Laborer | Canada |
| 58 | Joe Mcelroy | 20 | Son | New Worker | Michigan |
| 59 | Ruby Mcelroy | 18 | Daughter | New Worker | England |
| 60 | Lawrence Mcelroy | 15 | Son | New Worker | Michigan |
| 61 | Mary Mcelroy THIS PERSON | 14 | Daughter | — | Michigan |
| 62 | Frances Marie Mcelroy | 22 | Daughter | — | England |
| 63 | James H. Baker | 48 | Head | Wholesale Jobber | Michigan |
| 64 | Sylvia E. Baker | 32 | Wife | — | England |
| 65 | Lois H. Baker | 4 | Daughter | — | Michigan |
| 66 | Vera Z. Baker | 2 | Daughter | — | Michigan |
| 67 | William B. Root | 39 | Head | Horseman | Michigan |
| 68 | Josephine B. Root | 42 | Wife | — | Michigan |
| 69 | Elmer R. Anderson | 38 | Boarder | Groom | Kentucky |
| 70 | Charles A. Metz | 38 | Head | Warehouseman | Ohio |
| 71 | Louesa C. Metz | 31 | Wife | — | Ohio |
| 72 | Dale H. Metz | 9 | Son | — | Ohio |
| 73 | Barbara A. Metz | 7 | Daughter | — | Ohio |
| 74 | Richard P. Metz | 3 | Son | — | Ohio |
| 75 | Herbert Schlemmer | 33 | Head | Dispatcher | Canada |
| 76 | Alice Schlemmer | 33 | Wife | — | Canada |
| 77 | Donald Schlemmer | 9 | Son | — | Michigan |
| 78 | Homer Gysel | 21 | Head | Driver Construction | Indiana |
| 79 | Thelma Gysel | 21 | Wife | — | Belgium |
| 80 | Marie D. Gysel | 3 | Son | — | Michigan |
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)