MM
Margaret Mcmahon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wayne-County, Michigan
Our Model Tree links this Margaret Mcmahon across the 1930 and 1940 US Censuses in Wayne-County, Michigan (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 11-person household.
Age 15
b. ~1925
Female
Daughter
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wayne-County, Michigan |
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Detroit City |
| Est. Birth Year | ~1925 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Thomas Mcmahon | Son | — | 17 | ~1923 |
| Neil Mcmahon | Son | — | ~1940 | |
| Harriette Mcmahon | Daughter | — | 9 | ~1931 |
| Le Mcmahon | Son | — | 12 | ~1928 |
| Vivian Mcmahon | Daughter | — | 10 | ~1930 |
| James Mcmahon | Son | — | 7 | ~1933 |
| Daniel Mcmahon | Head | — | 39 | ~1901 |
| Margaret Mcmahon | Daughter | — | 15 | ~1925 |
| Marie Mcmahon | Spouse | — | 36 | ~1904 |
| Patrick Mcmahon | Son | — | 2 | ~1938 |
| Elaine Mcmahon | Daughter | — | 14 | ~1926 |
Census Appearances
1930
Wayne, Michigan
Daughter, age 4
Wayne, Michigan · implied b. ~1926 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Mary |
| 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 15
Wayne-County, Michigan · implied b. ~1925 — 11 household members
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Income (1939) | 0 |
| Highest Grade | H-1 |
| 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 Margaret Mcmahon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Margaret Mcmahon
Daughter · 1940 · age 15 · b. ~1925 · Michigan
★ You are viewing this record
Sibling
Elaine Mcmahon
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Neil Mcmahon
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patrick Mcmahon
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harriette Mcmahon
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mcmahon
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Mcmahon
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vivian Mcmahon
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Le Mcmahon
Sibling · 1940 · age 12
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-t0627-01861-00647)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Arthur Hill | 49 | Head | Stockman | England |
| 42 | Mary Hill | 44 | Wife | — | England |
| 43 | Mitchell Holden | 54 | Head | Digger | England |
| 44 | Ellen Holden | 74 | Wife | — | New York |
| 45 | Jack Stewart | 41 | Head | Foreman | Pennsylvania |
| 46 | Yatta Stewart | 28 | Wife | — | Ohio |
| 47 | Sally J. Stewart | 4 | Daughter | — | Michigan |
| 48 | August Ditschlag | 59 | Head | Assembler | Michigan |
| 49 | Harley Ditschlag | 23 | Son | Steel Helper | Michigan |
| 50 | Frederick Ditschlag | 20 | Son | New Worker | Michigan |
| 51 | Viola Ditschlag | 19 | Daughter | — | Michigan |
| 52 | Harold Ditschlag | 18 | Son | New Worker | Michigan |
| 53 | Shirley Ditschlag | 15 | Daughter | — | Michigan |
| 54 | Charles Phillips | 58 | Head | Marker | Michigan |
| 55 | Florence Phillips | 55 | Wife | — | Michigan |
| 56 | Charles Phillips | 27 | Son | — | Michigan |
| 57 | Nanita Phillips | 16 | Daughter | — | Michigan |
| 58 | Arvin Phillips | 14 | Son | — | Michigan |
| 59 | Merrill Phillips | 10 | Son | — | Michigan |
| 60 | Anne Vymazal | 49 | Head | — | Austria |
| 61 | Frances Vymazal | 20 | Daughter | Seamstress | Pennsylvania |
| 62 | Elizabeth Vymazal | 18 | Daughter | New Worker | Pennsylvania |
| 63 | Dorothy Vymazal | 14 | Daughter | — | Michigan |
| 64 | James Vymazal | 10 | Son | — | Michigan |
| 65 | Janis Vymazal | 6 | Son | — | Michigan |
| 66 | Daniel Mcmahon | 39 | Head | Truck Driver | Michigan |
| 67 | Marie Mcmahon | 36 | Wife | — | Michigan |
| 68 | Thomas Mcmahon | 17 | Son | — | Michigan |
| 69 | Margaret Mcmahon THIS PERSON | 15 | Daughter | — | Michigan |
| 70 | Elaine Mcmahon | 14 | Daughter | — | Michigan |
| 71 | Le Roy Mcmahon | 12 | Son | — | Michigan |
| 72 | Vivian Mcmahon | 10 | Daughter | — | Michigan |
| 73 | Harriette Mcmahon | 9 | Daughter | — | Michigan |
| 74 | James Mcmahon | 7 | Son | — | Michigan |
| 75 | Patrick Mcmahon | 2 | Son | — | Michigan |
| 76 | Neil Mcmahon | 0 | Son | — | Michigan |
| 77 | Charles Krukowski | 48 | Head | — | Poland |
| 78 | Helen Krukowski | 40 | Wife | — | Poland |
| 79 | Stella Krukowski | 17 | Daughter | — | Pennsylvania |
| 80 | Bernice Krukowski | 14 | Daughter | — | Pennsylvania |
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)