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Mary Mueller — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Mueller across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1890), then head of a 7-person household.
Age 50
b. ~1890
Female
Spouse
Born: Lithuania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Mueller |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Lithuania |
| 1935 Residence (City) | Heidelberg |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 3 |
| 1935 Residence | Same House |
| Birth Country | Lithuania |
| Birthplace (normalized) | lithuania |
| Township / Ward | Heidelberg |
| Est. Birth Year | ~1890 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Marilyn Hendzel | Daughter | — | 9 | ~1931 |
| William Mueller | Son | — | 27 | ~1913 |
| Mary Mueller | Spouse | — | 50 | ~1890 |
| Mary Hendzel | Daughter | — | 30 | ~1910 |
| Joseph Mueller | Head | — | 53 | ~1887 |
| Leo Hendzel | Son | — | 33 | ~1907 |
| James Mueller | Son | — | 20 | ~1920 |
Census Appearances
1930
Allegheny, Pennsylvania
Other, age 39
Allegheny, Pennsylvania · implied b. ~1891 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mueller |
| Given Name | Mary |
| Relationship to Head | wife-H |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Lithuania |
| Naturalization Status | Naturalized |
| Year of Immigration | 1896 |
| Age at First Marriage | 18 |
| Father's Birthplace | Lithuania |
| Mother's Birthplace | Lithuania |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | Lithuanian |
| Veteran | No |
| Birth Country | Lithuania |
| Birthplace (normalized) | lithuania |
1940
Allegheny-County, Pennsylvania
Spouse, age 50
Allegheny-County, Pennsylvania · implied b. ~1890 — 7 household members
| Surname | Mueller |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Lithuania |
| 1935 Residence (City) | Heidelberg |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Income (1939) | 0 |
| Highest Grade | No 3 |
| 1935 Residence | Same House |
| Birth Country | Lithuania |
| Birthplace (normalized) | lithuania |
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 Mueller across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Mueller
Spouse · 1940 · age 50 · b. ~1890 · 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-t0627-03405-00388)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Hiller | 27 | Head | Labor | Pennsylvania |
| 2 | Mary Hiller | 27 | Wife | — | Pennsylvania |
| 3 | Carol Hiller | 6 | Daughter | — | Pennsylvania |
| 4 | Ralph Hiller | 5 | Son | — | Pennsylvania |
| 5 | Joanna Hiller | 4 | Daughter | — | Pennsylvania |
| 6 | Bernard Burshlawski | 77 | Head | Machinist Helper | Iron Place |
| 7 | Frances Burshlawski | 46 | Wife | — | Iron Place |
| 8 | Irene Burshlawski | 26 | Daughter | Paster | Iron Place |
| 9 | Gertrude Burshlawski | 23 | Daughter | Clerk | Iron Place |
| 10 | Bernard Burshlawski | 21 | Son | New Worker | Iron Place |
| 11 | Alexander Wroblewski | 49 | Head | Labor | Poland |
| 12 | Nellie Wroblewski | 48 | Wife | — | Pennsylvania |
| 13 | Virginia Wroblewski | 19 | Daughter | New Worker | Pennsylvania |
| 14 | Steve Burdes | 69 | Head | — | Austria |
| 15 | Anna Burdes | 59 | Wife | — | Pennsylvania |
| 16 | Andrew Burdes | 38 | Son | Manager | Pennsylvania |
| 17 | Adella Balsarini | 68 | Head | — | Italy |
| 18 | Lena Balsarini | 45 | Daughter | Housework | Pennsylvania |
| 19 | Charles Balsarini | 42 | Son | Crane Operator | Pennsylvania |
| 20 | Paul Roncari | 59 | Brother | Coal Miner | Italy |
| 21 | Elizabeth Balsarini | 28 | Niece | Stenographer | Pennsylvania |
| 22 | Steven Balsarini | 52 | Nephew | Labor | Italy |
| 23 | Ernest Jr. Balsarini | 17 | Son | — | Pennsylvania |
| 24 | Ernest Balsarini | 43 | Head | Assessor | Pennsylvania |
| 25 | Margaret Balsarini | 38 | Wife | — | Pennsylvania |
| 26 | Margaret Balsarini | 7 | Daughter | — | Pennsylvania |
| 27 | James Balsarini | 4 | Son | — | Pennsylvania |
| 28 | Emil Barus | 23 | Head | Roller | Pennsylvania |
| 29 | Mildred Barus | 21 | Wife | — | Pennsylvania |
| 30 | Joseph Mueller | 53 | Head | Miner | Lithuania |
| 31 | Mary Mueller THIS PERSON | 50 | Wife | — | Lithuania |
| 32 | William Mueller | 27 | Son | Mechanic | Pennsylvania |
| 33 | James Mueller | 20 | Son | Clerk | Pennsylvania |
| 34 | Leo Hendzel | 33 | Son | Labor | Pennsylvania |
| 35 | Mary Hendzel | 30 | Daughter | — | Pennsylvania |
| 36 | Marilyn Hendzel | 9 | Daughter | — | Pennsylvania |
| 37 | Anna Freshwater | 52 | Head | Matron | Pennsylvania |
| 38 | Emmett Freshwater | 29 | Son | Machinist | Pennsylvania |
| 39 | Robert Freshwater | 26 | Son | Lineman | Pennsylvania |
| 40 | Irene Freshwater | 21 | Son | Clerk | 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)