MF
Mary Frederick — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Macomb-County, Michigan
Our Model Tree links this Mary Frederick across the 1920, 1930 and 1940 US Censuses in Macomb-County, Michigan (XGBoost, ~Confirmed) — first a spouse (b.~1876), then head of a 5-person household.
Age 64
b. ~1876
Female
Spouse
Born: Michigan
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Macomb-County, Michigan |
| Surname | Frederick |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Mt. Clemens |
| 1935 Residence (County) | Macomb |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same House |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Mt Clemens |
| Est. Birth Year | ~1876 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Peter Benoit | Other | — | 48 | ~1892 |
| Florence Benoit | Daughter | — | 41 | ~1899 |
| Mable Frederick | Daughter | — | 35 | ~1905 |
| John Frederick | Head | — | 62 | ~1878 |
| Mary Frederick | Spouse | — | 64 | ~1876 |
Census Appearances
1920
Macomb, Michigan
Spouse, age 43
Macomb, Michigan · implied b. ~1877 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Michigan |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1930
Macomb, Michigan
Spouse, age 53
Macomb, Michigan · implied b. ~1877 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | Mary Jane |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Michigan |
| Age at First Marriage | 22 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Macomb-County, Michigan
Spouse, age 64
Macomb-County, Michigan · implied b. ~1876 — 5 household members
| Surname | Frederick |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Mt. Clemens |
| 1935 Residence (County) | Macomb |
| Highest Grade | No 5 |
| 1935 Residence | Same House |
| 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 Frederick across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Frederick
Spouse · 1940 · age 64 · b. ~1876 · Michigan
★ 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 — Macomb-County, Michigan
Open full size
1940 US Federal Census — Macomb-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01783-00712)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Miriam Moorman | 37 | Head | Teacher | Michigan |
| 42 | Winifred Fueril | 37 | Partner | Teacher | Michigan |
| 43 | Harold Sherman | 38 | Head | Inspector | Michigan |
| 44 | Dorothy Sherman | 37 | Wife | — | Michigan |
| 45 | Charles Sherman | 13 | Son | — | Michigan |
| 46 | Janet Sherman | 9 | Daughter | — | Michigan |
| 47 | John G. Frederick | 62 | Head | Contractor | Michigan |
| 48 | Mary Frederick THIS PERSON | 64 | Wife | — | Michigan |
| 49 | Peter A. Benoit | 48 | Son-in-law | Owner | Michigan |
| 50 | Florence Benoit | 41 | Daughter | — | Michigan |
| 51 | Mable A. Frederick | 35 | Daughter | Typist | Michigan |
| 52 | Ruschel Trombley | 54 | Head | Chef | Michigan |
| 53 | Julia Trombley | 55 | Wife | — | Michigan |
| 54 | Evelyn Trombley | 17 | Daughter | — | Michigan |
| 55 | Isabelle Trombley | 86 | Mother | — | Michigan |
| 56 | Donald D. Fournier | 7 | Grandson | — | Michigan |
| 57 | Theodore M. Pettibone | 41 | Head | Engineer | New York |
| 58 | Isabel Pettibone | 39 | Wife | — | New York |
| 59 | Theodore F. Pettibone | 14 | Son | — | Illinois |
| 60 | Robert N. Pettibone | 1 | Son | — | Michigan |
| 61 | Ralph H. Donaldson | 54 | Head | Real Estate | Michigan |
| 62 | Laura E. Donaldson | 51 | Wife | — | Michigan |
| 63 | James Donaldson | 18 | Son | — | Michigan |
| 64 | Ralph Donaldson | 11 | Son | — | Michigan |
| 65 | Margaret A. Pingel | 50 | Head | — | Michigan |
| 66 | James Pingel | 19 | Son | — | Michigan |
| 67 | M. Joy Pingel | 21 | Daughter | — | Michigan |
| 68 | Fred Heldt | 63 | Head | — | Michigan |
| 69 | Minnie Nicolai | 59 | Housekeeper | Housekeeper | Michigan |
| 70 | Courtlard Whitney | 77 | Head | Probation Officer | Michigan |
| 71 | Maude B. Whitney | 73 | Wife | — | Missouri |
| 72 | Frank Lennebacker | 71 | Head | — | Michigan |
| 73 | Maude M. Lennebacker | 66 | Wife | — | Michigan |
| 74 | Lucius W. Fast | 63 | Head | Supt. | Michigan |
| 75 | Bessie B. Fast | 58 | Wife | — | Ohio |
| 76 | James E. Fast | 18 | Son | — | Michigan |
| 77 | Roy J. Hancock | 39 | Head | Bus Driver | Canada English |
| 78 | Thelma A. Hancock | 31 | Wife | Reporter | Michigan |
| 79 | John R. Reuse | 25 | Brother-in-law | Teller | Michigan |
| 80 | Donald Baarck | 23 | Head | Make-Up Man | Michigan |
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)