MW
Mary Welsh — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mclean-County, North Dakota
Our Model Tree links this Mary Welsh across the 1930 and 1940 US Censuses in Mclean-County, North Dakota (XGBoost, ~Confirmed) — first a spouse (b.~1907), then head of a 6-person household.
Age 33
b. ~1907
Female
Spouse
Born: North Dakota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mclean-County, North Dakota |
| Surname | Welsh |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | North Dakota |
| 1935 Residence (City) | T-147-R-85 |
| 1935 Residence (County) | McLean |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same Place |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
| Township / Ward | T147R85 |
| Est. Birth Year | ~1907 |
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 |
|---|---|---|---|---|
| Mary Welsh | Spouse | — | 33 | ~1907 |
| Glen Welsh | Son | — | 12 | ~1928 |
| Doris Welsh | Daughter | — | 13 | ~1927 |
| Andrew Welsh | Head | — | 42 | ~1898 |
| June Welsh | Daughter | — | 6 | ~1934 |
| Neal Welsh | Son | — | 5 | ~1935 |
Census Appearances
1930
Mclean, North …
Spouse, age 23
Mclean, North Dakota · implied b. ~1907 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welsh |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | North Dakota |
| Age at First Marriage | 19 |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Wisconsin |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1940
Mclean-County, North …
Spouse, age 33
Mclean-County, North Dakota · implied b. ~1907 — 6 household members
| Surname | Welsh |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | North Dakota |
| 1935 Residence (City) | T-147-R-85 |
| 1935 Residence (County) | McLean |
| Income (1939) | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same Place |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north 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
Spouse · 1940 · age 33 · b. ~1907 · North Dakota
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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 — Mclean-County, North Dakota
Open full size
1940 US Federal Census — Mclean-County, North Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03006-00861)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Andrew Welsh | 42 | Head | Farmer | Illinois |
| 2 | Mary Welsh THIS PERSON | 33 | Wife | — | North Dakota |
| 3 | Doris Welsh | 13 | Daughter | — | North Dakota |
| 4 | Glen Welsh | 12 | Son | — | North Dakota |
| 5 | June A. Welsh | 6 | Daughter | — | North Dakota |
| 6 | Neal Welsh | 5 | Son | — | North Dakota |
| 7 | William B. Neal | 48 | Head | Writer | North Dakota |
| 8 | Mildred Neal | 49 | Wife | — | Wisconsin |
| 9 | Helen Neal | 17 | Daughter | — | North Dakota |
| 10 | Donald Neal | 16 | Son | Farmer | North Dakota |
| 11 | Harrison Neal | 14 | Son | Farm Hand | North Dakota |
| 12 | Ruth Neal | 12 | Daughter | — | North Dakota |
| 13 | Gus Nordwall | 61 | Head | Farmer | Illinois |
| 14 | Lena Nordwall | 44 | Wife | — | Illinois |
| 15 | Harold Nordwall | 21 | Son | Farmer | North Dakota |
| 16 | Earl Nordwall | 19 | Son | Farmer | North Dakota |
| 17 | Bonnie Nordwall | 4 | Daughter | — | North Dakota |
| 18 | Mike Kazmozick|Kazmazick | 50 | Head | Farmer | Minnesota |
| 19 | Mary Kazmozick|Kazmazick | 42 | Wife | — | Minnesota |
| 20 | Wayne Kazmozick|Kazmazick | 18 | Son | Farmer | North Dakota |
| 21 | Serkrin|Serkvin Kazmozick|Kazmazick | 17 | Son | Farmer | North Dakota |
| 22 | Edwin Kazmozick|Kazmazick | 14 | Son | Farmer | North Dakota |
| 23 | Vernon Kazmozick|Kazmazick | 13 | Son | — | North Dakota |
| 24 | Altis Kazmozick|Kazmazick | 11 | Son | — | North Dakota |
| 25 | Mary Lou Kazmozick|Kazmazick | 7 | Daughter | — | North Dakota |
| 26 | Jacob Reuter | 45 | Head | Farmer | Minnesota |
| 27 | Minnie Reuter | 33 | Wife | — | Minnesota |
| 28 | Francis Reuter | 10 | Son | — | North Dakota |
| 29 | Sylvester Reuter | 8 | Son | — | North Dakota |
| 30 | Helen Reuter | 5 | Daughter | — | North Dakota |
| 31 | Clarince Reuter | 2 | Son | — | North Dakota |
| 32 | Philip Ryan | 47 | Hired hand | Laborer | Minnesota |
| 33 | Henry Yankee | 50 | Head | Farmer | Wisconsin |
| 34 | Stephen Green | 69 | Lodger | — | Irish Free State |
| 35 | J. R. Oloughson | 24 | Head | Farmer | North Dakota |
| 36 | Ira Patterson | 37 | Head | Farmer | Nebraska |
| 37 | Elizabeth Patterson | 33 | Wife | — | North Dakota |
| 38 | Walter Patterson | 13 | Son | — | North Dakota |
| 39 | James Patterson | 7 | Son | — | North Dakota |
| 40 | Earl Patterson | 6 | Son | — | North 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)