MW
Mary Welsh — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Brown-County, South Dakota
Our Model Tree links this Mary Welsh across the 1930 and 1940 US Censuses in Brown-County, South Dakota (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 3-person household.
Age 16
b. ~1924
Female
Daughter
Born: South Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Brown-County, South Dakota |
| Surname | Welsh |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Aberdeen City |
| 1935 Residence (County) | Brown |
| Additional Details | |
| Hours Worked | 6 |
| Highest Grade | H 2 |
| 1935 Residence | Same Place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Township / Ward | Aberdeen City |
| Est. Birth Year | ~1924 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Nellie Welsh | Spouse | — | 50 | ~1890 |
| Mary Welsh | Daughter | — | 16 | ~1924 |
| Robert Welsh | Head | — | 49 | ~1891 |
Census Appearances
1930
Brown, South …
Daughter, age 6
Brown, South Dakota · implied b. ~1924 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Walsch |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Brown-County, South …
Daughter, age 16
Brown-County, South Dakota · implied b. ~1924 — 3 household members
| Surname | Welsh |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Aberdeen City |
| 1935 Residence (County) | Brown |
| Hours Worked | 6 |
| Highest Grade | H 2 |
| 1935 Residence | Same Place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
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 Welsh across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Welsh
Daughter · 1940 · age 16 · b. ~1924 · South Dakota
★ 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 — Brown-County, South Dakota
Open full size
1940 US Federal Census — Brown-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03849-00151)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | C. R. Mitchell | 50 | Head | Conductor | Ohio |
| 42 | Grace Mitchell | 52 | Wife | — | Iowa |
| 43 | Rachel Mitchell | 21 | Daughter | Stenographer | South Dakota |
| 44 | Patricia Mitchell | 15 | Daughter | — | South Dakota |
| 45 | Michael Mitchell | 14 | Son | — | South Dakota |
| 46 | Arthur N. Carrier | 50 | Head | Supt Of Meter Water Dept | South Dakota |
| 47 | Nellie Carrier | 48 | Wife | Clerk - Sten | South Dakota |
| 48 | Arthur Jr. Carrier | 22 | Son | — | South Dakota |
| 49 | Alfred D. Thompson | 38 | Head | Butcher | Minnesota |
| 50 | Etna Thompson | 34 | Wife | — | Oklahoma |
| 51 | Lynn Thompson | 2 | Daughter | — | South Dakota |
| 52 | C. J. Kugler | 33 | Head | Mail Contractor | South Dakota |
| 53 | Dorothea Kugler | 29 | Wife | — | South Dakota |
| 54 | Jean Kugler | 4 | Daughter | — | South Dakota |
| 55 | Jerry Kugler | 2 | Son | — | South Dakota |
| 56 | Edward R. Hagan | 40 | Head | Machinist | North Dakota |
| 57 | Anne Hagan | 36 | Wife | — | Austria |
| 58 | Robert Hagan | 7 | Son | — | South Dakota |
| 59 | Dale Hagan | 3 | Son | — | South Dakota |
| 60 | G. E. Walker | 46 | Head | Aligning | Iowa |
| 61 | Bessie Walker | 44 | Wife | — | Iowa |
| 62 | Robert Walker | 16 | Son | — | South Dakota |
| 63 | Lyle (Al) Walker | 19 | Son | — | North Dakota |
| 64 | Charles Grapes | 60 | Head | — | Iowa |
| 65 | Mildred Grapes | 26 | Daughter | Recreation Project | South Dakota |
| 66 | Elvira Grapes | 21 | Daughter | — | South Dakota |
| 67 | Angus Jr. Thompson | 40 | Head | Street Cleaner | South Dakota |
| 68 | Julia Thompson | 39 | Wife | — | South Dakota |
| 69 | Dorine Thompson | 17 | Daughter | Typing Assistant | South Dakota |
| 70 | Laverne Thompson | 15 | Son | — | South Dakota |
| 71 | Orlyn Thompson | 13 | Son | — | Washington |
| 72 | Luella Thompson | 9 | Daughter | — | South Dakota |
| 73 | Robert Welsh | 49 | Head | Field Representative | Minnesota |
| 74 | Nellie E. Welsh | 50 | Wife | Field Representative | Minnesota |
| 75 | Mary Ellen Welsh THIS PERSON | 16 | Daughter | — | South Dakota |
| 76 | R. L. Welsh | 25 | Head | Police Man | South Dakota |
| 77 | Dorothy Welsh | 25 | Wife | — | Iowa |
| 78 | Muriel Welsh | 7 | Daughter | — | South Dakota |
| 79 | Robert Welsh | 6 | Son | — | South Dakota |
| 80 | Thomas Welsh | 4 | Son | — | South Dakota |
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)