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Mary Mueller — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Waukesha-County, Wisconsin
Our Model Tree links this Mary Mueller across the 1930 and 1940 US Censuses in Waukesha-County, Wisconsin (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 5-person household.
Age 12
b. ~1928
Female
Daughter
Born: Wisconsin
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Waukesha-County, Wisconsin |
| Surname | Mueller |
| Given Name | Mary Anne |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Brookfield Township |
| 1935 Residence (County) | Waukesha |
| Additional Details | |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Township / Ward | Brookfield Township |
| Est. Birth Year | ~1928 |
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 |
|---|---|---|---|---|
| Johanna Mueller | Other | — | 71 | ~1869 |
| Cyprian Friederick | Head | — | 45 | ~1895 |
| Mary Mueller | Daughter | — | 12 | ~1928 |
| Frederick Mueller | Son | — | 19 | ~1921 |
| Otto Mueller | Son | — | 18 | ~1922 |
Census Appearances
1930
Jefferson, Wisconsin
Daughter, age 1
Jefferson, Wisconsin · implied b. ~1929 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mueller |
| Given Name | Mary Ann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Waukesha-County, Wisconsin
Daughter, age 12
Waukesha-County, Wisconsin · implied b. ~1928 — 5 household members
| Surname | Mueller |
| Given Name | Mary Anne |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Brookfield Township |
| 1935 Residence (County) | Waukesha |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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.
Show:
This person
Anchor record
Mary Mueller
Daughter · 1940 · age 12 · b. ~1928 · Wisconsin
★ You are viewing this record
Sibling
Otto Mueller
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frederick Mueller
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Waukesha-County, Wisconsin
Open full size
1940 US Federal Census — Waukesha-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04533-00105)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eugene Graff | 58 | Head | Farmer | Wisconsin |
| 2 | Eliza Graff | 81 | Mother | — | Germany |
| 3 | Eugene Graff | 36 | Son | Farm Hand | Wisconsin |
| 4 | Viola Dayer | 34 | Daughter | — | Wisconsin |
| 5 | Milton Dayer | 32 | Husband | Farm Hand | Wisconsin |
| 6 | Arlene Dayer | 4 | Daughter | — | Wisconsin |
| 7 | Cyprian Friederick | 45 | Head | Laborer | Germany |
| 8 | Johanna Mueller | 71 | Mother | — | Germany |
| 9 | Frederick Mueller | 19 | Son | Private Home | Germany |
| 10 | Otto Mueller | 18 | Son | Student | Germany |
| 11 | Mary Anne Mueller THIS PERSON | 12 | Daughter | — | Wisconsin |
| 12 | Henry Courtney | 41 | Head | Steel Finisher | Wisconsin |
| 13 | Dolly Courtney | 37 | Wife | — | Illinois |
| 14 | Robert Courtney | 6 | Son | — | Wisconsin |
| 15 | Patricia Courtney | 5 | Daughter | — | Wisconsin |
| 16 | Charles Weyer | 74 | Head | Retired Farmer | Wisconsin |
| 17 | Alice Weyer | 51 | Wife | — | Wisconsin |
| 18 | Adolph Sira | 42 | Head | Farmer | Germany |
| 19 | Julia Sira | 32 | Wife | — | Germany |
| 20 | Siegfried Sira | 10 | Son | — | South Dakota |
| 21 | Fritz Sira | 9 | Son | — | South Dakota |
| 22 | Karl Sira | 5 | Son | — | Wisconsin |
| 23 | Richard Sira | 2 | Son | — | Wisconsin |
| 24 | Erwin Gartz | 40 | Head | Farmer | Wisconsin |
| 25 | Regina Gartz | 32 | Wife | — | Wisconsin |
| 26 | Erwin Jr. Gartz | 7 | Son | — | Wisconsin |
| 27 | Donald Gartz | 5 | Son | — | Wisconsin |
| 28 | Albert Claus | 55 | Head | Farm Laborer | Wisconsin |
| 29 | Ella Claus | 51 | Wife | — | Wisconsin |
| 30 | Alphonse Dietel | 58 | Head | Farmer | Czechoslovakia |
| 31 | Helen Dietel | 45 | Wife | — | Czechoslovakia |
| 32 | Helen Dietel | 17 | Daughter | — | Wisconsin |
| 33 | Molly Dietel | 19 | Daughter | Housework | Wisconsin |
| 34 | Albert Dietel | 12 | Son | — | Wisconsin |
| 35 | Willie King | 54 | Head | Farmer | Wisconsin |
| 36 | Emma King | 51 | Wife | Housekeeper | Wisconsin |
| 37 | Willie King | 15 | Son | — | South Dakota |
| 38 | John Van Leer | 46 | Head | Farmer | Wisconsin |
| 39 | Elizabeth Van Leer | 44 | Wife | — | Wisconsin |
| 40 | Walter Van Leer | 22 | Son | Farmer | Wisconsin |
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)