MW
Mary Welsh — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Welsh across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1889), then head of a 5-person household.
Age 51
b. ~1889
Female
Spouse
Born: England
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Welsh |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same house |
| Birth Country | England |
| Birthplace (normalized) | england |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1889 |
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 |
|---|---|---|---|---|
| Mary Welsh | Spouse | — | 51 | ~1889 |
| Mary Clark | Other | — | 82 | ~1858 |
| Delia Welsh | Son | — | 10 | ~1930 |
| John Welsh | Son | — | 25 | ~1915 |
| Patrick Welsh | Head | — | 58 | ~1882 |
Census Appearances
1930
Allegheny, Pennsylvania
Other, age 42
Allegheny, Pennsylvania · implied b. ~1888 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welsh |
| Given Name | Mary E. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | Naturalized |
| Year of Immigration | 1891 |
| Age at First Marriage | 17 |
| Father's Birthplace | England |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Allegheny-County, Pennsylvania
Spouse, age 51
Allegheny-County, Pennsylvania · implied b. ~1889 — 5 household members
| Surname | Welsh |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Highest Grade | No 5 |
| 1935 Residence | Same house |
| Birth Country | England |
| Birthplace (normalized) | england |
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 51 · b. ~1889 · Pennsylvania
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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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03669-00433)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marie Frey | 45 | Wife | — | Pennsylvania |
| 2 | William Frey | 50 | Brother-in-law | Clerk | Pennsylvania |
| 3 | William J. Edward | 58 | Head | Laborer | Wales |
| 4 | Anna Edward | 51 | Wife | — | Pennsylvania |
| 5 | Nelly Edward | 80 | Mother-in-law | — | Pennsylvania |
| 6 | Peter Baupp | 32 | Head | English Teacher | Oklahoma |
| 7 | Charlotte Baupp | 32 | Wife | Clerk | Pennsylvania |
| 8 | David Baupp | 7 | Son | Clerk | Pennsylvania |
| 9 | Edward D. Sidle | 69 | Head | Tinner | Pennsylvania |
| 10 | Clara Sidle | 35 | Daughter | Clerk | Pennsylvania |
| 11 | Raymond Sidle | 38 | Son | Clerk | Pennsylvania |
| 12 | Harry J. Wilson | 53 | Head | P.O. Supt. | Pennsylvania |
| 13 | Elizabeth Wilson | 49 | Wife | — | Pennsylvania |
| 14 | Rita Wilson | 24 | Daughter | Stenographer | Pennsylvania |
| 15 | Betty Wilson | 20 | Daughter | — | Pennsylvania |
| 16 | Harry Jr. Wilson | 18 | Son | — | Pennsylvania |
| 17 | Bernadette Wilson | 12 | Daughter | — | Pennsylvania |
| 18 | Dunlap Dolores Wilson | 15 | Niece | — | Pennsylvania |
| 19 | William Davis | 43 | Head | Mechanic | Pennsylvania |
| 20 | Julia Davis | 40 | Wife | — | Pennsylvania |
| 21 | Leo Jamison | 32 | Head | Transmission | Ohio |
| 22 | Beatrice Jamison | 30 | Wife | Manager | Pennsylvania |
| 23 | Carol Jamison | 2 | Daughter | — | Pennsylvania |
| 24 | Walter Sidle | 26 | Head | Meat Cutter | Pennsylvania |
| 25 | Catherine Sidle | 24 | Wife | Salesman | Pennsylvania |
| 26 | Patrick Welsh | 58 | Head | — | Pennsylvania |
| 27 | Mary Welsh THIS PERSON | 51 | Wife | — | England |
| 28 | John Welsh | 25 | Son | Laborer | Pennsylvania |
| 29 | Mary Clark | 82 | Mother-in-law | — | England |
| 30 | Delia Welsh | 10 | Son | — | Pennsylvania |
| 31 | Joseph Ryan | 44 | Head | Electrician | Pennsylvania |
| 32 | Anna Ryan | 38 | Wife | — | Pennsylvania |
| 33 | Edward Vinnings | 55 | Head | Engineer | Ohio |
| 34 | Lillian Vinnings | 45 | Wife | — | England |
| 35 | Frank Gaylorson | 52 | Head | Metallurgist | England |
| 36 | Ethel Gaylorson | 50 | Wife | — | New York |
| 37 | Donald Gaylorson | 22 | Son | — | Pennsylvania |
| 38 | Barbara Gaylorson | 17 | Daughter | — | Pennsylvania |
| 39 | Dolores Albrecht | 27 | Head | — | Pennsylvania |
| 40 | Clarence Albrecht | 30 | Husband | Sales Manager | Pennsylvania |
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)