MD
Mary Duggan — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Mary Duggan across the 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1906), then head of a 9-person household.
Age 24
b. ~1906
Female
Spouse
Born: Illinois
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Duggan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 17 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Spring Forest Village |
| Est. Birth Year | ~1906 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Delores Duggan | Daughter | — | 2 | ~1928 |
| Mary Duggan | Spouse | — | 24 | ~1906 |
| Arthur Duggan | Head | — | 26 | ~1904 |
| Anna Halverson | Other | — | 43 | ~1887 |
| Edith Duggan | Daughter | — | 5 | ~1925 |
| Richard Duggan | Son | — | 6 | ~1924 |
| Merrill Duggan | Son | — | ~1930 | |
| Annabelle Duggan | Daughter | — | 3 | ~1927 |
| Arthur Duggan | Son | — | 7 | ~1923 |
Census Appearances
1930
Cook, Illinois
Spouse, age 24
Cook, Illinois · implied b. ~1906 — 9 household members
| Surname | Duggan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 17 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 35
Cook-County, Illinois · implied b. ~1905
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Dugan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Teacher |
| Industry | Public School |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 2725 |
| Highest Grade | H 4 |
| 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 Duggan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Duggan
Spouse · 1930 · age 24 · b. ~1906 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel503:0010)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elaine Shruse | 4 | Daughter | — | Illinois |
| 2 | Albert Sikyla | 52 | Head | Stone Cutter | Czechoslovakia |
| 3 | Irene Luhman | 49 | Head | — | Illinois |
| 4 | Raymond Luhman | 27 | Son | — | Illinois |
| 5 | Otto Luhman | 23 | Son | — | Illinois |
| 6 | Howard Hans | 25 | Son-in-law | Truck Driver | Missouri |
| 7 | Jeanette Hans | 25 | Daughter | — | Illinois |
| 8 | Doris Hans | 2 | Gr. Daughter | — | Illinois |
| 9 | Hyman Kluger | 45 | Brother | Laborer | Illinois |
| 10 | Clarence Landery | 26 | Head | Laborer | Illinois |
| 11 | Helen Landery | 23 | Wife | — | Illinois |
| 12 | Casimer Kruczkow | 37 | Head | Carpenter | Indiana |
| 13 | Anna Kruczkow | 36 | Wife | — | Indiana |
| 14 | Thomas Kruczkow | 79 | Father | — | Germany |
| 15 | Willard W. Greene | 41 | Head | Mechanic | Ohio |
| 16 | Frances Greene | 21 | Wife | — | Michigan |
| 17 | Hazel Greene | 2 | Daughter | — | Ohio |
| 18 | Arthur Vildman | 28 | Head | Salesman | Illinois |
| 19 | Alice Vildman | 27 | Wife | — | Illinois |
| 20 | Delores Vildman | 4 | Daughter | — | Illinois |
| 21 | Alice Vildman | 2 | Daughter | — | Illinois |
| 22 | Edward Wallace | 35 | Head | Carpenter | Indiana |
| 23 | Cecelia Wallace | 37 | Wife | — | Illinois |
| 24 | Edward Wallace | 7 | Son | — | Illinois |
| 25 | Charles Pettig | 36 | Head | Carpenter | Illinois |
| 26 | Irene Pettig | 27 | Wife | — | Minnesota |
| 27 | Wayne Pettig | 2 | Son | — | Illinois |
| 28 | Sidney Hart | 51 | Head | Salesman | England |
| 29 | Laura Hart | 50 | Wife | — | Canada |
| 30 | Ned Mcdaniel | 25 | Head | Electrician | Kansas |
| 31 | Mary Mcdaniel | 26 | Wife | — | Indiana |
| 32 | Arthur Duggan | 26 | Head | Truck Driver | Illinois |
| 33 | Mary Duggan THIS PERSON | 24 | Wife | — | Illinois |
| 34 | Arthur Duggan | 7 | Son | — | Illinois |
| 35 | Richard Duggan | 6 | Son | — | Illinois |
| 36 | Edith Duggan | 5 | Daughter | — | Illinois |
| 37 | Annabelle Duggan | 3 | Daughter | — | Illinois |
| 38 | Delores Duggan | 2 | Daughter | — | Illinois |
| 39 | Merrill Duggan | 0 | Son | — | Illinois |
| 40 | Anna Halverson | 43 | Mother | — | Illinois |
| 41 | Charles Furry | 47 | Head | Proprietor | Illinois |
| 42 | Mathilda Furry | 27 | Wife | — | Illinois |
| 43 | Violet Furry | 7 | Daughter | — | Illinois |
| 44 | Mabel Furry | 6 | Daughter | — | Illinois |
| 45 | Irene Furry | 4 | Daughter | — | Illinois |
| 46 | Adeline Furry | 2 | Daughter | — | Illinois |
| 47 | Frank Kasalunskis | 52 | Head | Laborer | Russia |
| 48 | Anna Kasalunskis | 52 | Wife | — | Russia |
| 49 | Frances Kasalunskis | 15 | Daughter | — | Illinois |
| 50 | Charles Lukas | 40 | Boarder | Laborer | Russia |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)