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John Mckenzie — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Mckenzie across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1932), then head of a 12-person household.
Age 8
b. ~1932
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | McKenzie |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1932 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Nathaniel Mckenzie | Son | — | 8 | ~1932 |
| Elsie Mckenzie | Daughter | — | 15 | ~1925 |
| Fred Mckenzie | Son | — | 16 | ~1924 |
| Jean Mckenzie | Daughter | — | 6 | ~1934 |
| Allan Mckenzie | Son | — | 19 | ~1921 |
| Jane Mckenzie | Daughter | — | 6 | ~1934 |
| John Mckenzie | Son | — | 8 | ~1932 |
| Felix Mckenzie | Son | — | 11 | ~1929 |
| Phillip Mckenzie | Head | — | 48 | ~1892 |
| Ervin Mckenzie | Son | — | 13 | ~1927 |
| Edna Mckenzie | Daughter | — | 17 | ~1923 |
| Myrtle Mckenzie | Daughter | — | 12 | ~1928 |
Census Appearances
1930
Cook, Illinois
Son, age 1
Cook, Illinois · implied b. ~1929 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mc Kenzie |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Jamaica W. Indies |
| Mother's Birthplace | Jamaica |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 8
Cook-County, Illinois · implied b. ~1932 — 12 household members
| Surname | McKenzie |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Highest Grade | No 3 |
| 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 John Mckenzie across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mckenzie
Son · 1940 · age 8 · b. ~1932 · Illinois
★ You are viewing this record
Sibling
Elsie Mckenzie
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edna Mckenzie
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jane Mckenzie
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Felix Mckenzie
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Mckenzie
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Allan Mckenzie
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Myrtle Mckenzie
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ervin Mckenzie
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fred Mckenzie
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nathaniel Mckenzie
Sibling · 1940 · age 8
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-t0627-00925-00673)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lydia Walter | 51 | Head | Teacher | Illinois |
| 2 | Laura Walter | 43 | Sister | Teacher | Illinois |
| 3 | Ruby Wertz | 39 | Cousin | Clothes Sorter | Illinois |
| 4 | Mary Walter | 17 | Cousin | — | Illinois |
| 5 | Violet Walter | 46 | Cousin | Stenographer | Illinois |
| 6 | Melvin Walter | 36 | Cousin | Garage Attendant | Illinois |
| 7 | Phillip Mckenzie | 48 | Head | Carpenter | West Indies |
| 8 | Allan Mckenzie | 19 | Son | — | Pennsylvania |
| 9 | Edna Mckenzie | 17 | Daughter | — | Pennsylvania |
| 10 | Fred Mckenzie | 16 | Son | — | Pennsylvania |
| 11 | Elsie Mckenzie | 15 | Daughter | — | Illinois |
| 12 | Ervin Mckenzie | 13 | Son | — | Illinois |
| 13 | Myrtle Mckenzie | 12 | Daughter | — | Illinois |
| 14 | Felix Mckenzie | 11 | Son | — | Illinois |
| 15 | John Mckenzie THIS PERSON | 8 | Son | — | Illinois |
| 16 | Nathaniel Mckenzie | 8 | Son | — | Illinois |
| 17 | Jane Mckenzie | 6 | Daughter | — | Illinois |
| 18 | Jean Mckenzie | 6 | Daughter | — | Illinois |
| 19 | George Brumage | 50 | Head | Inspector Casing | Mississippi |
| 20 | Anna Brumage | 47 | Wife | Laundress | Georgia |
| 21 | Mable Adams | 42 | Lodger | Bar-Maid | Mississippi |
| 22 | William Brooks | 45 | Head | Labourer | Louisiana |
| 23 | Mellie Brooks | 41 | Wife | — | Mississippi |
| 24 | Nellie Brooks | 13 | Daughter | — | Illinois |
| 25 | Frank Jones | 39 | Head | Manager | Georgia |
| 26 | Ada Jones | 33 | Wife | Laundress | Missouri |
| 27 | Nannie King | 49 | Lodger | — | Tennessee |
| 28 | Martha Smith | 62 | Head | — | Alabama |
| 29 | Jackson Smith | 24 | Husband | — | Mississippi |
| 30 | Jack Lyons | 17 | Grand-son | Clerk | Illinois |
| 31 | Frank Ross | 27 | Lodger | Grocer | Illinois |
| 32 | Mary Jones | 40 | Head | — | Georgia |
| 33 | Bernice Jones | 10 | Daughter | — | Georgia |
| 34 | Hattie Hazelwood | 43 | Head | — | Mississippi |
| 35 | Mary Hazelwood | 19 | Daughter | Clerk | Illinois |
| 36 | Leroy Hazelwood | 13 | Son | — | Illinois |
| 37 | Queen E. Hazelwood | 10 | Daughter | — | Illinois |
| 38 | Esther Hazelwood | 2 | Daughter | — | Illinois |
| 39 | Ben Hatter | 37 | Head | Labour | Mississippi |
| 40 | Ida Mae Hatter | 29 | Wife | — | Alabama |
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)