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Mary Mueller — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this Mary Mueller across the 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1903), then head of a 4-person household.
Age 37
b. ~1903
Female
Spouse
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Mueller |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Lawrence |
| 1935 Residence (County) | Essex |
| Naturalization Status | Alien |
| Additional Details | |
| Occupation | Weaver |
| Industry | Woolen Mill |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 800 |
| Highest Grade | H 8 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Weaver |
| Township / Ward | Lawrence |
| Est. Birth Year | ~1903 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mueller | Spouse | — | 37 | ~1903 |
| Elizabeth Mueller | Daughter | — | 11 | ~1929 |
| Dorothy Mueller | Daughter | — | 13 | ~1927 |
| Conrad Mueller | Head | — | 39 | ~1901 |
Census Appearances
1930
Essex, Massachusetts
Spouse, age 27
Essex, Massachusetts · implied b. ~1903 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mueller |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Alien |
| Year of Immigration | 1922 |
| Age at First Marriage | 25 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Essex-County, Massachusetts
Spouse, age 37
Essex-County, Massachusetts · implied b. ~1903 — 4 household members
| Surname | Mueller |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Lawrence |
| 1935 Residence (County) | Essex |
| Naturalization Status | Alien |
| Occupation | Weaver |
| Industry | Woolen Mill |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 800 |
| Highest Grade | H 8 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 37 · b. ~1903 · Massachusetts
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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 — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01582-00610)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Linehan | 34 | Son | Office | Massachusetts |
| 42 | Ellen Linehan | 44 | Sister-in-law | Salesgirl | Massachusetts |
| 43 | Thomas Linehan | 48 | Head | Splicer | Massachusetts |
| 44 | Jean Linehan | 41 | Wife | Mender | Scotland |
| 45 | Bayama Isbell | 32 | Head | Salesman | Massachusetts |
| 46 | Rose Isbell | 32 | Wife | — | Massachusetts |
| 47 | Anne Isbell | 3 | Daughter | — | Massachusetts |
| 48 | Blaza Isbell | 2 | Daughter | — | Massachusetts |
| 49 | Isadore Isbell | 60 | Head | Proprietor Of Furniture | Russia |
| 50 | Gertrude Isbell | 59 | Wife | — | Russia |
| 51 | Joseph Isbell | 19 | Son | Asst To Proprietor | Massachusetts |
| 53 | Conrad Mueller | 39 | Head | Weaver | Massachusetts |
| 54 | Mary Mueller THIS PERSON | 37 | Wife | Weaver | Scotland |
| 55 | Dorothy Mueller | 13 | Daughter | — | Massachusetts |
| 56 | Elizabeth Mueller | 11 | Daughter | — | Massachusetts |
| 57 | Leo Passagian | 34 | Head | Photo Engraver | Armenia |
| 58 | Rose Passagian | 30 | Wife | — | Massachusetts |
| 59 | Lorraine Passagian | 6 | Daughter | — | Massachusetts |
| 60 | Sylvia Passagian | 4 | Daughter | — | Massachusetts |
| 61 | Anthony Rizzo | 49 | Head | Comber | Italy |
| 62 | Annie Rizzo | 43 | Wife | Drawer | Italy |
| 63 | Fred Rizzo | 21 | Son | Chef | Massachusetts |
| 64 | Mary Rizzo | 12 | Daughter | — | Massachusetts |
| 65 | Joseph Rizzo | 25 | Son | Chef | Massachusetts |
| 66 | Gloria Rizzo | 19 | Daughter-in-law | — | Massachusetts |
| 67 | Anita Rizzo | 1 | Granddaughter | — | Massachusetts |
| 68 | Michael Collopy | 62 | Head | Laborer | Massachusetts |
| 69 | Joanna Collopy | 60 | Wife | — | England |
| 70 | Catherine Collopy | 29 | Daughter | Mender | Massachusetts |
| 71 | Margaret Collopy | 27 | Daughter | Registered Nurse | Massachusetts |
| 72 | Elizabeth Collopy | 25 | Daughter | Registered Nurse | Massachusetts |
| 73 | Phillip Demarco | 37 | Head | Wool Sorter | Italy |
| 74 | Margaret Demarco | 32 | Wife | — | Massachusetts |
| 75 | Phillip Jr. Demarco | 12 | Son | — | Massachusetts |
| 76 | James Demarco | 5 | Son | — | Massachusetts |
| 77 | Hollie Heifetz | 50 | Head | — | Lithuania |
| 78 | Bloss Heifetz | 55 | Husband | Peddler Of Vegetables | Russia |
| 79 | George Heifetz | 27 | Son | Salesman | Massachusetts |
| 80 | Harold Heifetz | 20 | Son | Salesman | Massachusetts |
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)