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Mary Holland — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Holland across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Steven & Joshua — first a spouse (b.~1913), then head of a 3-person household.
Age 27
b. ~1913
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Holland |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | C-2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1913 |
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 |
|---|---|---|---|---|
| Jerome Holland | Head | — | 31 | ~1909 |
| Michael Holland | Son | — | ~1940 | |
| Mary Holland | Spouse | — | 27 | ~1913 |
Census Appearances
1920
Cook, Illinois
Daughter, age 4
Cook, Illinois · implied b. ~1916 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Holland |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Canada |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 15
Cook, Illinois · implied b. ~1915 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Holland |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Spouse, age 27
Cook-County, Illinois · implied b. ~1913 — 3 household members
| Surname | Holland |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Class of Worker | 0 |
| Highest Grade | C-2 |
| 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 Holland across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Steven Holland (~0.92 confidence) and father Joshua Holland (~0.92 confidence) and mother Mary Holland (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Steven Holland
b. ~1867
Source father
● Household
· direct · ~0.92
Father
Joshua Holland
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Mary Holland
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Holland
Spouse · 1940 · age 27 · b. ~1913 · Illinois
★ You are viewing this record
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-t0627-01020-00417)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ernst Helman | 39 | Head | Machinist | Germany |
| 2 | Emma Helman | 35 | Wife | — | Germany |
| 3 | Curt Helman | 10 | Son | — | Illinois |
| 4 | Helen Helman | 5 | Daughter | — | Illinois |
| 5 | Ira Wyatt | 38 | Head | Mechanical Engineer | Mississippi |
| 6 | Hilda Wyatt | 34 | Wife | — | Wisconsin |
| 7 | Robert Wyatt | 1 | Son | — | Illinois |
| 8 | Wilbur Davis | 52 | Head | Manufacturer | Indiana |
| 9 | Florence Davis | 50 | Wife | — | Indiana |
| 10 | Alice Beard | 56 | Head | — | Illinois |
| 11 | Irving Beard | 26 | Son | Accountant | Illinois |
| 12 | Henry T. Kittaby | 39 | Head | Salesman | Iowa |
| 13 | Dorothy M. Kittaby | 39 | Wife | — | Illinois |
| 14 | Jack M. Brooks | 61 | Head | Salesman | Ohio |
| 15 | Casey Brooks | 50 | Wife | — | Canada-English |
| 16 | Justin J. Nolan | 42 | Head | Transportation Manager | Illinois |
| 17 | Jean Nolan | 39 | Wife | — | Indiana |
| 18 | Justine Nolan | 6 | Daughter | — | Illinois |
| 19 | William Grinnell | 34 | Head | Postal Clerk | Maryland |
| 20 | Evelyn Grinnell | 33 | Wife | — | Illinois |
| 21 | Margaret Bruce | 29 | Head | Teller | Illinois |
| 22 | Isabell Bruce | 62 | Mother | — | Scotland |
| 23 | Irene Nelson | 25 | Lodger | Stenographer | Illinois |
| 24 | Raymond Hoffman | 30 | Head | Estimator | Pennsylvania |
| 25 | Verna Hoffman | 31 | Wife | — | Illinois |
| 26 | Frank Placek | 36 | Head | Manager | Nebraska |
| 27 | Helen Placek | 30 | Wife | — | Illinois |
| 28 | William Comiskey | 52 | Head | Manager | Illinois |
| 29 | Amanda Comiskey | 32 | Wife | — | Wisconsin |
| 30 | Jerome Holland | 31 | Head | Architectural Supervisor | Illinois |
| 31 | Mary Holland THIS PERSON | 27 | Wife | — | Illinois |
| 32 | Michael Holland | 0 | Son | — | Illinois |
| 33 | Thomas Charlesworth | 28 | Head | Life Insurance Salesman | Indiana |
| 34 | Loris Charlesworth | 22 | Wife | — | Michigan |
| 35 | Judd Charlesworth | 1 | Son | — | Illinois |
| 36 | Joseph Messer | 63 | Head | Proprietor | Illinois |
| 37 | Lana Messer | 56 | Wife | — | Wisconsin |
| 38 | Robert Goldstein | 70 | Head | — | Illinois |
| 39 | Clara Goldstein | 64 | Wife | — | New York |
| 40 | Robert M. Goldstein | 28 | Son | Medical Doctor | Illinois |
Related Census Records
Pedigree Summary
Mary
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)