MR
Mary Roche — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Mary Roche across the 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 6-person household.
Age 12
b. ~1928
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Roche |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1928 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Sidney Roche | Son | — | 13 | ~1927 |
| Louis Roche | Head | — | 42 | ~1898 |
| Louis Roche | Son | — | 15 | ~1925 |
| James Roche | Son | — | 6 | ~1934 |
| Ruth Roche | Spouse | — | 36 | ~1904 |
| Mary Roche | Daughter | — | 12 | ~1928 |
Census Appearances
1930
Baltimore, Maryland
Daughter, age 2
Baltimore, Maryland · implied b. ~1928 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Roche |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Daughter, age 12
Baltimore-City-County, Maryland · implied b. ~1928 — 6 household members
| Surname | Roche |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 12 · b. ~1928 · Maryland
★ You are viewing this record
Sibling
James Roche
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sidney Roche
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louis Roche
Sibling · 1940 · age 15
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 — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01539-00568)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Elizabeth Brandt | 50 | Wife | — | Maryland |
| 42 | Helen C. Brandt | 24 | Daughter | Librarian | Maryland |
| 43 | Milton Brandt | 20 | Son | — | Maryland |
| 44 | Marshall Brandt | 16 | Son | — | Maryland |
| 45 | Arthur C. Jones | 46 | Head | Executive | Virginia |
| 46 | Laura C. Jones | 44 | Wife | — | Maryland |
| 47 | Arthur C. Jones | 18 | Son | — | Maryland |
| 48 | Mary E. Jones | 16 | Daughter | — | Maryland |
| 49 | Christine Jones | 12 | Daughter | — | Maryland |
| 50 | Arthur E. Jones | 83 | Father-in-law | — | Maryland |
| 51 | Elizabeth A. Jones | 78 | Mother-in-law | — | Massachusetts |
| 52 | Louise A. Munn | 55 | Head | Art Supervisor | Kansas |
| 53 | Lena A. Tucker | 45 | Friend | Art Teacher | Maryland |
| 54 | Gurney H. Dayett | 53 | Head | Engineer | Delaware |
| 55 | Alice M. Dayett | 53 | Wife | — | Delaware |
| 56 | Anna M. Dayett | 24 | Daughter | — | Delaware |
| 57 | Leslie G. Dayett | 82 | Father | — | Delaware |
| 58 | Anna M. Dayett | 80 | Mother | — | Delaware |
| 60 | Louis C. Roche | 42 | Head | General | Maryland |
| 61 | Ruth H. Roche | 36 | Wife | — | Maryland |
| 62 | Louis C. Jr. Roche | 15 | Son | — | Maryland |
| 63 | Sidney S. Roche | 13 | Son | — | Maryland |
| 64 | Mary E. Roche THIS PERSON | 12 | Daughter | — | Maryland |
| 65 | James L. Roche | 6 | Son | — | Maryland |
| 66 | Ludwig A. Staub | 64 | Head | Watch Maker | Maryland |
| 67 | Dorothy C. Staub | 59 | Wife | Telephone Operator | New York |
| 68 | Donald F. Staub | 26 | Son | Clock Maker | Maryland |
| 69 | Barbara N. Staub | 22 | Daughter-in-law | — | Maryland |
| 70 | Christian Kirchmeiser | 61 | Head | Meat Butcher | Maryland |
| 71 | Minnie W. Kirchmeiser | 52 | Wife | — | Maryland |
| 72 | Melvin Kirchmeiser | 20 | Son | Clerk | Maryland |
| 73 | Helen L. Le Brun | 27 | Daughter | Clerk | Maryland |
| 74 | Catherine L. Pabst | 26 | Niece | Clerk | Maryland |
| 75 | Edwin D. Coster | 66 | Head | — | Maryland |
| 76 | Anna C. Coster | 55 | Wife | — | Maryland |
| 77 | Thomas P. Dryden | 54 | Head | Merchant | Maryland |
| 78 | Hortense H. Dryden | 45 | Wife | — | Illinois |
| 79 | John H. Dryden | 14 | Son | — | Maryland |
| 80 | Hylja Lindross | 42 | Servant | Housekeeper | Finland |
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)