MF
Mary Frederick — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wayne-County, Michigan
Our Model Tree links this Mary Frederick across the 1920, 1930 and 1940 US Censuses in Wayne-County, Michigan (XGBoost, ~Confirmed) — first a spouse (b.~1914), then head of a 4-person household.
Age 26
b. ~1914
Female
Spouse
Born: Michigan
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Wayne-County, Michigan |
| Surname | Frederick |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Hamtramck City |
| 1935 Residence (County) | Wayne |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Hamtramck City |
| Est. Birth Year | ~1914 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Benjamin Frederick | Head | — | 35 | ~1905 |
| Mary Frederick | Spouse | — | 26 | ~1914 |
| Michael Frederick | Son | — | 3 | ~1937 |
| Patricia Frederick | Daughter | — | 5 | ~1935 |
Census Appearances
1920
Wayne, Michigan
Other, age 4
Wayne, Michigan · implied b. ~1916 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | Margaret N |
| Relationship to Head | granddaughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Canada |
| Occupation | none |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1930
Wayne, Michigan
Other, age 15
Wayne, Michigan · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | Margaret |
| Relationship to Head | Step-daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Canada English |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Wayne-County, Michigan
Spouse, age 26
Wayne-County, Michigan · implied b. ~1914 — 4 household members
| Surname | Frederick |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Hamtramck City |
| 1935 Residence (County) | Wayne |
| Highest Grade | No 8 |
| 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 26 · b. ~1914 · Michigan
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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-t0627-01829-00760)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Sam Juskiewicz | 24 | Son | Assistant | Michigan |
| 42 | Richard Blaszczyk | 17 | Step-son | — | Michigan |
| 43 | Felix Makiszewski | 49 | Head | Clerk | Poland |
| 44 | Julia Makiszewski | 49 | Wife | Asst. Clerk | Poland |
| 45 | Frank Makiszewski | 23 | Son | — | Michigan |
| 46 | Walter Makiszewski | 19 | Son | Asst. Clerk | Michigan |
| 47 | Albina Makiszewski | 17 | Daughter | — | Michigan |
| 48 | Michael Obuchowski | 54 | Head | Salesman | Poland |
| 49 | Helen Obuchowski | 50 | Wife | — | Poland |
| 50 | Mary Obuchowski | 26 | Daughter | Clerk | Michigan |
| 51 | Edward Obuchowski | 24 | Son | — | Michigan |
| 52 | Genevieve Obuchowski | 17 | Daughter | — | Michigan |
| 53 | Cecilia Obuchowski | 10 | Daughter | — | Michigan |
| 54 | Mary Hicks | 49 | Head | — | Hungary |
| 55 | George Hicks | 24 | Son | Sander Factory | Michigan |
| 56 | Frank Hicks | 22 | Son | Ship. Room | Michigan |
| 57 | Frances Hicks | 19 | Daughter | Office Help | Michigan |
| 58 | Thelia Kluinski | 49 | Head | Janitress-Lady | Poland |
| 59 | Joseph Kluinski | 32 | Son | Water Dept | Pittsburgh |
| 60 | Herman Kluinski | 25 | Son | — | Ohio |
| 61 | Casimer Kluinski | 23 | Son | — | Michigan |
| 62 | Walter Kluinski | 20 | Son | Sail Worker | Michigan |
| 63 | Walter Habisck | 51 | Brother | Met Body Fin | Poland |
| 64 | John Majewski | 47 | Head | Carpenter | Poland |
| 65 | Stella Majewski | 46 | Wife | — | Poland |
| 66 | John Jr. Majewski | 25 | Son | Salesman | Michigan |
| 67 | Wanda Majewski | 15 | Daughter | — | Michigan |
| 68 | Benjamin Frederick | 35 | Head | Dingman | Hungary |
| 69 | Mary Frederick THIS PERSON | 26 | Wife | — | Michigan |
| 70 | Patricia Frederick | 5 | Daughter | — | Michigan |
| 71 | Michael Frederick | 3 | Son | — | Michigan |
| 72 | Anastasia Szczypczak | 65 | Head | — | Poland |
| 73 | Loretta Lewandowska | 12 | Grand-Daughter | — | Michigan |
| 74 | Sophie Sley | 53 | Head | Janitress-Woman | Poland |
| 75 | Virginia Sley | 18 | Daughter | Saleslady | Michigan |
| 76 | Irene Sley | 17 | Daughter | New Worker | Michigan |
| 77 | Dorothy Sley | 16 | Daughter | New Worker | Michigan |
| 78 | Edward Sley | 28 | Son | Bartender | Pennsylvania |
| 79 | Mary Sley | 28 | Wife | — | Michigan |
| 80 | Robert Sley | 4 | 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)