MR
Mary Roche — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Clair-County, Michigan
Our Model Tree links this Mary Roche across the 1930 and 1940 US Censuses in St.-Clair-County, Michigan (XGBoost, ~Confirmed) — first a daughter (b.~1915), then head of a 5-person household.
Age 25
b. ~1915
Female
Daughter
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Michigan |
| Surname | Roche |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Port Huron City |
| 1935 Residence (County) | Saint Clair |
| Additional Details | |
| Occupation | Waitress |
| Industry | Retail Art Shop |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 478 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | Waitress |
| Township / Ward | Port Huron City |
| Est. Birth Year | ~1915 |
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 |
|---|---|---|---|---|
| Lena Roche | Head | — | 54 | ~1886 |
| Mary Roche | Daughter | — | 25 | ~1915 |
| Charles Roche | Son | — | 18 | ~1922 |
| Richard Roche | Son | — | 16 | ~1924 |
| Fred Roche | Son | — | 21 | ~1919 |
Census Appearances
1930
St Clair, …
Daughter, age 14
St Clair, Michigan · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Rock |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Hungary |
| Mother's Birthplace | Hungary |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
St.-Clair-County, Michigan
Daughter, age 25
St.-Clair-County, Michigan · implied b. ~1915 — 5 household members
| Surname | Roche |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Port Huron City |
| 1935 Residence (County) | Saint Clair |
| Occupation | Waitress |
| Industry | Retail Art Shop |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 478 |
| 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 Roche across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Roche
Daughter · 1940 · age 25 · b. ~1915 · Michigan
★ You are viewing this record
Sibling
Richard Roche
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fred Roche
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Roche
Sibling · 1940 · age 18
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 — St.-Clair-County, Michigan
Open full size
1940 US Federal Census — St.-Clair-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01816-00120)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William W Haar | 6 | Son | — | Michigan |
| 2 | Donald E Haar | 3 | Son | — | Michigan |
| 3 | Ernest E Trapper | 58 | Head | Painter | Canada-English |
| 4 | Violet Trapper | 51 | Wife | — | Michigan |
| 5 | Victor Trapper | 25 | Son | Janitor | Michigan |
| 6 | Frank Catanzaro | 47 | Head | Proprietor | Italy |
| 7 | Ruth Marie Ryan | 47 | Head | — | Michigan |
| 8 | Lillian Raish | 64 | Lodger | — | Canada-English |
| 9 | Joseph Oberstadt | 44 | Lodger | Maintenance Man | Michigan |
| 10 | Pennell Wright | 56 | Head | Laborer | Michigan |
| 11 | Duwain Wright | 18 | Son | — | Michigan |
| 12 | Robert Jones | 40 | Head | Athletic Coach | Michigan |
| 13 | Mildred Jones | 35 | Wife | — | Michigan |
| 14 | Beverley Jones | 11 | Daughter | — | Michigan |
| 15 | Richard Jones | 8 | Son | — | Michigan |
| 16 | Marilyn Jones | 5 | Daughter | — | Michigan |
| 17 | Margaret Jones | 5 | Daughter | — | Michigan |
| 18 | Judith Jones | 0 | Daughter | — | Michigan |
| 19 | Charles Hibye | 52 | Head | Proprietor | Syria |
| 20 | William Haddad | 50 | Lodger | Proprietor | Syria |
| 21 | Edmond Rahaim | 26 | Lodger | Salesman | Mississippi |
| 22 | Eugene Kornath | 56 | Head | Laborer | Illinois |
| 23 | Lena Roche | 54 | Head | Bartender | Michigan |
| 24 | Mary Roche THIS PERSON | 25 | Daughter | Waitress | Michigan |
| 25 | Fred Roche | 21 | Son | Assistant Manager | Michigan |
| 26 | Charles Roche | 18 | Son | — | Michigan |
| 27 | Richard Roche | 16 | Son | — | Michigan |
| 28 | Nelson Johnson | 66 | Head | Janitor | Tennessee |
| 29 | Mayme Reed | 47 | Lodger | Maid | Alabama |
| 30 | Idaelle Kinnard | 25 | Lodger | Maid | Alabama |
| 31 | Doris Mae Griffin | 10 | Niece | — | Ohio |
| 32 | Joseph Lipkey | 48 | Head | Actor | Michigan |
| 33 | Agnes Lipkey | 44 | Wife | — | Michigan |
| 34 | Paul Lipkey | 20 | Son | Actor | Michigan |
| 35 | Mary Lipkey | 17 | Daughter | — | Michigan |
| 36 | Richard Lipkey | 15 | Son | — | Michigan |
| 37 | Joseph Jr Lipkey | 13 | Son | — | Michigan |
| 38 | Maurice Lipkey | 10 | Son | — | Michigan |
| 39 | Aralee Lipkey | 8 | Daughter | — | Michigan |
| 40 | Nippie Woodyard | 31 | Head | Janitor | Maryland |
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)