MD
Mary Duffy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Dodge-County, Wisconsin
Our Model Tree links this Mary Duffy across the 1920, 1930 and 1940 US Censuses in Dodge-County, Wisconsin (XGBoost, ~Confirmed), with identified parents Robert & Robert — first a daughter (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Female
Daughter
Born: Wisconsin
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dodge-County, Wisconsin |
| Surname | Duffy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Juneau City |
| 1935 Residence (County) | Dodge |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Pension Dept. |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 900 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Stenographer |
| Township / Ward | Juneau City |
| Est. Birth Year | ~1918 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Duffy | Daughter | — | 22 | ~1918 |
| Roberta Duffy | Daughter | — | 21 | ~1919 |
| Robert Duffy | Head | — | 47 | ~1893 |
Census Appearances
1920
Dodge, Wisconsin
Daughter, age 2
Dodge, Wisconsin · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1930
Dodge, Wisconsin
Daughter, age 12
Dodge, Wisconsin · implied b. ~1918 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Mary Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Can Read/Write | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Dodge-County, Wisconsin
Daughter, age 22
Dodge-County, Wisconsin · implied b. ~1918 — 3 household members
| Surname | Duffy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Juneau City |
| 1935 Residence (County) | Dodge |
| Occupation | Stenographer |
| Industry | Pension Dept. |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 900 |
| Highest Grade | Hs 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 Duffy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Duffy (~0.92 confidence) and father Robert Duffy (~0.92 confidence) and mother Irene Duffy (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Duffy
b. ~1893
Source father
● Household
· direct · ~0.92
Father
Robert Duffy
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Irene Duffy
b. ~1896
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Duffy
Daughter · 1940 · age 22 · b. ~1918 · Wisconsin
★ You are viewing this record
Sibling
Roberta Duffy
Sibling · 1940 · age 21
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 — Dodge-County, Wisconsin
Open full size
1940 US Federal Census — Dodge-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04472-00779)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frank Mietzel | 63 | Head | Repair Man | Wisconsin |
| 42 | Hattie Mietzel | 55 | Wife | — | Minnesota |
| 43 | Frank Jr. Mietzel | 13 | Son | — | Wisconsin |
| 44 | Herbert Panger | 24 | Head | Laborer | Wisconsin |
| 45 | Loretta Panger | 22 | Wife | — | Wisconsin |
| 46 | Diane Panger | 2 | Daughter | — | Wisconsin |
| 47 | Raymond Rohde | 41 | Head | Carpenter | Michigan |
| 48 | Adeline Rohde | 41 | Wife | — | Wisconsin |
| 49 | Gale Rohde | 16 | Daughter | — | Wisconsin |
| 50 | Augusta Wierschke | 73 | Mother-in-law | — | Germany |
| 51 | Hilgard Metzger | 85 | Head | — | Germany |
| 52 | Emil Rulpas | 64 | Head | Tavern Keeper | Wisconsin |
| 53 | Bertha Rulpas | 64 | Wife | — | Wisconsin |
| 54 | Arthur Wierschke | 37 | Son | Laborer | Wisconsin |
| 55 | Norma Wierschke | 37 | Wife | — | Wisconsin |
| 56 | Mary Wierschke | 11 | Daughter | — | Wisconsin |
| 57 | Edward Wierschke | 5 | Son | — | Wisconsin |
| 58 | Emil Benkhoff | 44 | Head | Laborer | Wisconsin |
| 59 | Viola Benkhoff | 44 | Wife | — | Wisconsin |
| 60 | Clyde Benkhoff | 16 | Son | — | Wisconsin |
| 61 | Lena Lindeman | 52 | Head | — | Wisconsin |
| 62 | Amanda Lindeman | 45 | Daughter | — | Wisconsin |
| 63 | Nelda Lindeman | 40 | Daughter | Secretary | Wisconsin |
| 64 | Elsa Lindeman | 32 | Daughter | Stenographer | Wisconsin |
| 65 | Hilda Lindeman | 28 | Daughter | Stenographer | Wisconsin |
| 66 | Carl Schadow | 37 | Head | Laborer | Wisconsin |
| 67 | Jennie Schadow | 28 | Wife | — | Wisconsin |
| 68 | Vivian Schadow | 10 | Daughter | — | Wisconsin |
| 69 | Henrietta Schadow | 9 | Daughter | — | Wisconsin |
| 70 | Ella Mae Schadow | 4 | Daughter | — | Wisconsin |
| 71 | Bernard Lutter | 59 | Head | Sheet Metal Worker | Minnesota |
| 72 | Emma Lutter | 59 | Wife | — | Minnesota |
| 73 | Arthur Fisher | 27 | Head | Mechanic | Colorado |
| 74 | Doris Fisher | 25 | Wife | Filler | Wisconsin |
| 75 | Alfred Schwartz | 42 | Head | Blacksmith | Wisconsin |
| 76 | Olga Schwartz | 57 | Wife | — | Wisconsin |
| 77 | Leona Huebner | 50 | Head | — | Wisconsin |
| 78 | Robert Duffy | 47 | Head | Mail Carrier | Wisconsin |
| 79 | Mary Duffy THIS PERSON | 22 | Daughter | Stenographer | Wisconsin |
| 80 | Roberta Duffy | 21 | Daughter | Stenographer | Wisconsin |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)