MW
Mary Wall — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Mary Wall across the 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1916), then head of a 5-person household.
Age 24
b. ~1916
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Wall |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Comptometer Op |
| Industry | Men's Clothing |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 256 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Comptometer Op |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1916 |
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 |
|---|---|---|---|---|
| L Wall | Son | — | 23 | ~1917 |
| Louise Wall | Spouse | — | 56 | ~1884 |
| Justus Wall | Head | — | 54 | ~1886 |
| Mary Wall | Daughter | — | 24 | ~1916 |
| John Wall | Son | — | 21 | ~1919 |
Census Appearances
1930
Baltimore, Maryland
Daughter, age 14
Baltimore, Maryland · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wall |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Daughter, age 24
Baltimore-City-County, Maryland · implied b. ~1916 — 5 household members
| Surname | Wall |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Comptometer Op |
| Industry | Men's Clothing |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 256 |
| Highest Grade | H 4 |
| 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 Wall across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Wall
Daughter · 1940 · age 24 · b. ~1916 · Maryland
★ You are viewing this record
Sibling
John Wall
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
L Wall
Sibling · 1940 · age 23
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
40 people indexed on this census page (nara:1940:m-t0627-01512-00030)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marie Chamberlain | 30 | Wife | — | Maryland |
| 42 | Charles Chamberlain | 7 | Son | — | Maryland |
| 43 | Lawrence Chamberlain | 3 | Son | — | Maryland |
| 44 | Louis Lutz | 22 | Head | Crane Operator | Maryland |
| 45 | Anita Lutz | 22 | Wife | — | Pennsylvania |
| 46 | Louis Lutz | 1 | Son | — | Maryland |
| 47 | Andrew Gosek | 33 | Head | Bottler | Maryland |
| 48 | Marie Gosek | 27 | Wife | Punch Press Operator | Maryland |
| 49 | Karl Jr Scharpf | 26 | Head | Baker | Maryland |
| 50 | Dorothy Scharpf | 19 | Wife | — | Maryland |
| 51 | John Jindra | 57 | Head | Tailor | Czechoslovakia |
| 52 | Josephine Jindra | 55 | Wife | — | Czechoslovakia |
| 53 | Helen Jindra | 33 | Daughter | — | Maryland |
| 54 | Wm J Ayrand | 57 | Head | Physician | Maryland |
| 55 | Victoria Ayrand | 45 | Wife | — | Maryland |
| 56 | Ernest Ayrand | 15 | Son | — | Maryland |
| 57 | Ruth Mccleary | 25 | Daughter | — | Maryland |
| 58 | John S Mccleary | 1 | Nephew | — | Maryland |
| 59 | C Edwin Prather | 41 | Head | Mail Carrier | Maryland |
| 60 | Thelma M Prather | 34 | Wife | — | New Jersey |
| 61 | Clara V Prather | 16 | Daughter | — | Maryland |
| 62 | Clara M Prather | 48 | Sister | — | Maryland |
| 63 | John B Welz | 53 | Head | Foreman | Maryland |
| 64 | Alvina Welz | 56 | Wife | — | Maryland |
| 65 | Frank Welz | 33 | Son | Packer | Maryland |
| 66 | Seth Hall | 37 | Son-in-law | Roll Turner | Maryland |
| 67 | Alvina Hall | 37 | Daughter | — | Maryland |
| 68 | Georgia Hall | 9 | Daughter | — | Maryland |
| 69 | Albert Strauch | 36 | Head | Shop Foreman | Maryland |
| 70 | Blanche Strauch | 38 | Wife | — | Czechoslovakia |
| 71 | Donald Strauch | 9 | Son | — | Maryland |
| 72 | Rose Vojta | 62 | Mother-in-law | — | Czechoslovakia |
| 73 | Joseph D Brown | 25 | Head | Spec. Investigator | Maryland |
| 74 | Mary Brown | 26 | Wife | — | Maryland |
| 75 | Justus Wall | 54 | Head | Treasurer | Maryland |
| 76 | Louise Wall | 56 | Wife | — | Maryland |
| 77 | Mary L Wall THIS PERSON | 24 | Daughter | Comptometer Op | Maryland |
| 78 | L Geo Jr Wall | 23 | Son | Waiter | Maryland |
| 79 | John C Wall | 21 | Son | Spreader | Maryland |
| 80 | Selma E Lehman | 50 | Head | Asst Secretary | 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)