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Margaret Mclean — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Margaret Mclean across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1915), then head of a 6-person household.
Age 25
b. ~1915
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | McLean |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Chicago City |
| Additional Details | |
| Occupation | Correspondent |
| Industry | Mail Order |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 936 |
| Highest Grade | No 8 |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Correspondent |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1915 |
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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| John Mclean | Son | — | 21 | ~1919 |
| Margaret Mclean | Daughter | — | 25 | ~1915 |
| Christine Mclean | Spouse | — | 47 | ~1893 |
| John Mclean | Head | — | 51 | ~1889 |
| Marie Mclean | Daughter | — | 17 | ~1923 |
| William Mclean | Son | — | 14 | ~1926 |
Census Appearances
1930
Cook, Illinois
Daughter, age 13
Cook, Illinois · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McLean |
| Given Name | Margaret J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Cook-County, Illinois
Daughter, age 25
Cook-County, Illinois · implied b. ~1915 — 6 household members
| Surname | McLean |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Chicago City |
| Occupation | Correspondent |
| Industry | Mail Order |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 936 |
| Highest Grade | No 8 |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Margaret Mclean across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Margaret Mclean
Daughter · 1940 · age 25 · b. ~1915 · Illinois
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Sibling
Marie Mclean
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Mclean
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mclean
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 — 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-t0627-00941-00510)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | George Rukavina | 44 | Head | Laborer | Yugoslavia |
| 42 | Susan Rukavina | 40 | Wife | — | Slovakia |
| 43 | Mary Rukavina | 13 | Daughter | — | Illinois |
| 44 | Theodore Rukavina | 12 | Son | — | Illinois |
| 45 | Christ Wilhelm | 34 | Head | Truck Driver | Illinois |
| 46 | Josephine Wilhelm | 30 | Wife | — | Illinois |
| 47 | Alfreda Wilhelm | 10 | Daughter | — | Illinois |
| 48 | Marsha Wilhelm | 10 | Daughter | — | Illinois |
| 49 | Christ Wilhelm | 3 | Son | — | Illinois |
| 50 | Nils Lund | 32 | Head | Machinist Helper | Sweden |
| 51 | Ella Lund | 27 | Wife | — | Norway |
| 52 | Loraine Lund | 7 | Daughter | — | California |
| 53 | Nils Jr. Lund | 6 | Son | — | California |
| 54 | Leonard Lund | 2 | Son | — | Illinois |
| 55 | John Mclean | 51 | Head | Landscaper | Ohio |
| 56 | Christine Mclean | 47 | Wife | — | Illinois |
| 57 | Margaret Mclean THIS PERSON | 25 | Daughter | Correspondent | Indiana |
| 58 | John Jr. Mclean | 21 | Son | Shipping Clerk | Indiana |
| 59 | Marie Mclean | 17 | Daughter | — | Illinois |
| 60 | William Mclean | 14 | Son | — | Illinois |
| 61 | Ernest Tronjo | 30 | Head | Head Gunner | Illinois |
| 62 | Leona Tronjo | 26 | Wife | — | Illinois |
| 63 | Gerald Tronjo | 8 | Son | — | Illinois |
| 64 | Arlene Tronjo | 5 | Daughter | — | Illinois |
| 65 | Peter Katsisoff | 46 | Head | Electrician | Bulgaria |
| 66 | Antoinette Katsisoff | 39 | Wife | — | Austria |
| 67 | Arlene Katsisoff | 14 | Daughter | — | Illinois |
| 68 | Gordon Gomozoff | 43 | Head | Moulder | Bulgaria |
| 69 | Angeline Gomozoff | 36 | Wife | — | Illinois |
| 70 | George Burke | 56 | Head | Asst Superintendent | Illinois |
| 71 | Emeline Burke | 56 | Wife | — | Illinois |
| 72 | Ernest Burger | 51 | Head | Handy Man | Germany |
| 73 | Marie Burger | 55 | Wife | — | Germany |
| 74 | Edward Burger | 26 | Son | Checker | Illinois |
| 75 | Anna Servinne | 64 | Head | — | Canada |
| 76 | — | None | — | — | — |
| 77 | Henry Johnson | 30 | Head | Stock Man | Illinois |
| 78 | Catherine Johnson | 30 | Wife | — | Illinois |
| 79 | August Mantai | 42 | Head | — | Germany |
| 80 | Adolph Mantai | 21 | Son | — | Illinois |
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)