MD
Mary Doherty — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Doherty across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Alex & Michael — first a daughter (b.~1917), then head of a 6-person household.
Age 23
b. ~1917
Female
Daughter
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Doherty |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1917 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Doherty | Daughter | — | 23 | ~1917 |
| Karrie Molloy | Son | — | 16 | ~1924 |
| Vincent Molloy | Son | — | 17 | ~1923 |
| Michael Molloy | Head | — | 55 | ~1885 |
| Delia Molloy | Spouse | — | 53 | ~1887 |
| Patrick Doherty | Other | — | 30 | ~1910 |
Census Appearances
1920
Cook, Illinois
Daughter, age 1
Cook, Illinois · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Doherty |
| Given Name | Margie |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 12
Cook, Illinois · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Doherty |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 23
Cook-County, Illinois · implied b. ~1917 — 6 household members
| Surname | Doherty |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Doherty across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Alex Doherty (~0.92 confidence) and father Michael Molloy (~0.92 confidence) and mother Delia Molloy (~0.92 confidence) and mother Minnie Doherty (~0.92 confidence) and mother Minnie Doherty (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alex Doherty
b. ~1885
Source father
● Household
· direct · ~0.92
Father
Michael Molloy
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Delia Molloy
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Minnie Doherty
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Minnie Doherty
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Doherty
Daughter · 1940 · age 23 · b. ~1917 · Illinois
★ You are viewing this record
Sibling
Karrie Molloy
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vincent Molloy
Sibling · 1940 · age 17
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01003-00800)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clarence Sherman | 34 | Head | Wireman | Illinois |
| 42 | Mildred Sherman | 33 | Wife | — | Illinois |
| 43 | Robert Sherman | 12 | Son | — | Illinois |
| 44 | Thomas Rapp | 68 | Head | Conductor | Wisconsin |
| 45 | Helen Rapp | 54 | Wife | — | Wisconsin |
| 46 | Adeline Schleiger | 51 | Head | Foreman | Germany |
| 47 | Lila Schleiger | 41 | Wife | — | Oakland |
| 48 | Edward Schleiger | 19 | Son | Welding | Illinois |
| 49 | Pauline Schleiger | 16 | Daughter | — | Illinois |
| 50 | Thomas Schleiger | 10 | Son | — | Illinois |
| 51 | Michael Molloy | 55 | Head | Stevedore | Irish Free State |
| 52 | Delia Molloy | 53 | Wife | — | Irish Free State |
| 53 | Vincent Molloy | 17 | Son | — | Illinois |
| 54 | Karrie Molloy | 16 | Son | — | Illinois |
| 55 | Mary Doherty THIS PERSON | 23 | Daughter | — | Illinois |
| 56 | Patrick Doherty | 30 | Son in law | Butcher | Irish Free State |
| 57 | Philip Mensch | 57 | Head | Janitor | Austria |
| 58 | Elizabeth Mensch | 57 | Wife | — | Austria |
| 59 | Catherine Mensch | 30 | Daughter | Factory | Illinois |
| 60 | Jacob Mensch | 25 | Son | — | Illinois |
| 61 | Frederick Mensch | 17 | Son | — | Illinois |
| 62 | Edward Brandenburg | 59 | Head | Sheet Metal Worker | Illinois |
| 63 | Louise Brandenburg | 35 | Wife | — | Germany |
| 64 | Charlotte Brandenburg | 7 | Daughter | — | Illinois |
| 65 | Evelyn Brandenburg | 4 | Daughter | — | Illinois |
| 66 | Edward Brandenburg | 2 | Son | — | Illinois |
| 67 | William Janschow | 61 | Head | Foreman | Germany |
| 68 | Caroline Janschow | 58 | Wife | — | Germany |
| 69 | John Janschow | 58 | Son | Salesman | Illinois |
| 70 | Lloyd Janschow | 28 | Son | Apprentice | Illinois |
| 71 | William Whitney | 7 | Grandson | — | Illinois |
| 72 | John Pajak | 52 | Head | Cabinet Maker | Michigan |
| 73 | Maryann Pajak | 50 | Wife | — | Illinois |
| 74 | Edwin Pajak | 27 | Son | Clerk | Illinois |
| 75 | Evelyn Pajak | 19 | Daughter | — | Illinois |
| 76 | Edwin Lipo | 42 | Head | Adjuster | Illinois |
| 77 | Hazel Lipo | 39 | Wife | — | Illinois |
| 78 | Gloria Lipo | 14 | Daughter | — | Illinois |
| 79 | Marilyn Lipo | 12 | Daughter | — | Illinois |
| 80 | Anita Lipo | 9 | Daughter | — | Illinois |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 5 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)