MG
Mary Gardner — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Milwaukee-County, Wisconsin
Our Model Tree links this Mary Gardner across the 1930 and 1940 US Censuses in Milwaukee-County, Wisconsin (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 9-person household.
Age 11
b. ~1929
Female
Daughter
Born: Wisconsin
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Milwaukee-County, Wisconsin |
| Surname | Gardner |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Town of Lake |
| 1935 Residence (County) | Milwaukee |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Township / Ward | Town Of Lake |
| Est. Birth Year | ~1929 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Gardner | Daughter | — | 11 | ~1929 |
| Frances Gardner | Daughter | — | 9 | ~1931 |
| Margaret Gardner | Daughter | — | 13 | ~1927 |
| John Gardner | Head | — | 41 | ~1899 |
| Robert Gardner | Son | — | 16 | ~1924 |
| Leo Gardner | Son | — | 6 | ~1934 |
| George Gardner | Son | — | 10 | ~1930 |
| John Gardner | Son | — | 5 | ~1935 |
| Irene Gardner | Spouse | — | 38 | ~1902 |
Census Appearances
1930
Milwaukee, Wisconsin
Daughter, age 1
Milwaukee, Wisconsin · implied b. ~1929 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gardner |
| Given Name | Mary C |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Illinois |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Milwaukee-County, Wisconsin
Daughter, age 11
Milwaukee-County, Wisconsin · implied b. ~1929 — 9 household members
| Surname | Gardner |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Town of Lake |
| 1935 Residence (County) | Milwaukee |
| Highest Grade | No 4 |
| 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 Gardner across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Gardner
Daughter · 1940 · age 11 · b. ~1929 · Wisconsin
★ You are viewing this record
Sibling
Robert Gardner
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Gardner
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Gardner
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Gardner
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leo Gardner
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Gardner
Sibling · 1940 · age 5
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 — Milwaukee-County, Wisconsin
Open full size
1940 US Federal Census — Milwaukee-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04501-00252)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Elizabeth Marsh | 28 | Wife | — | Wisconsin |
| 42 | Loren Marsh | 10 | Son | — | Wisconsin |
| 43 | Marion Marsh | 9 | Daughter | — | Wisconsin |
| 44 | William Marsh | 8 | Son | — | Wisconsin |
| 45 | Lois Jr. Marsh | 6 | Daughter | — | Wisconsin |
| 46 | Patricia Marsh | 5 | Daughter | — | Wisconsin |
| 47 | Emil Puchowski | 29 | Head | Shipping Clerk | Wisconsin |
| 48 | Ann Puchowski | 28 | Wife | — | Wisconsin |
| 49 | James Puchowski | 1 | Son | — | Wisconsin |
| 50 | Albert Hamalund | 36 | Head | Laborer | Wisconsin |
| 51 | Mary Hamalund | 36 | Wife | — | Wisconsin |
| 52 | Rosemary Hamalund | 9 | Daughter | — | Wisconsin |
| 53 | Robert Hamalund | 7 | Son | — | Wisconsin |
| 54 | Ruth Hamalund | 5 | Daughter | — | Wisconsin |
| 55 | John Gardner | 41 | Head | Purchasing Agent | Wisconsin |
| 56 | Irene Gardner | 38 | Wife | — | Illinois |
| 57 | Robert Gardner | 16 | Son | — | Illinois |
| 58 | Margaret Gardner | 13 | Daughter | — | Illinois |
| 59 | Mary Gardner THIS PERSON | 11 | Daughter | — | Wisconsin |
| 60 | George Gardner | 10 | Son | — | Wisconsin |
| 61 | Frances Gardner | 9 | Daughter | — | Wisconsin |
| 62 | Leo Gardner | 6 | Son | — | Wisconsin |
| 63 | John Gardner | 5 | Son | — | Wisconsin |
| 64 | George Steiner | 33 | Head | Spot Welder | Wisconsin |
| 65 | Agnes Steiner | 32 | Wife | — | Wisconsin |
| 66 | La Verne Steiner | 13 | Daughter | — | Wisconsin |
| 67 | George Jr. Steiner | 11 | Son | — | Wisconsin |
| 68 | James Steiner | 9 | Son | — | Wisconsin |
| 69 | Robert Steiner | 8 | Son | — | Wisconsin |
| 70 | Kenneth Steiner | 7 | Son | — | Wisconsin |
| 71 | Shirley Steiner | 5 | Daughter | — | Wisconsin |
| 72 | Patricia Steiner | 3 | Daughter | — | Wisconsin |
| 73 | Nancy Steiner | 1 | Daughter | — | Wisconsin |
| 74 | Walter Oelke | 45 | Head | Storekeeper | Wisconsin |
| 75 | Marie Oelke | 44 | Wife | — | Wisconsin |
| 76 | Irene Oelke | 22 | Daughter | Casing Worker | Wisconsin |
| 77 | Jean Oelke | 19 | Daughter | Sealer | Wisconsin |
| 78 | Robert Oelke | 14 | Son | — | Wisconsin |
| 79 | Walter Jr. Oelke | 11 | Son | — | Wisconsin |
| 80 | Frederick Oelke | 2 | Son | — | 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)