JJ
Jack Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Muskegon-County, Michigan
Our Model Tree links this Jack Johnson across the 1920, 1930 and 1940 US Censuses in Muskegon-County, Michigan (XGBoost, ~Confirmed), with identified parents Charles & Cora — first a son (b.~1919), then head of a 8-person household.
Age 21
b. ~1919
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Muskegon-County, Michigan |
| Surname | Johnson |
| Given Name | Jack |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Muskegon Hts. |
| 1935 Residence (County) | Muskegon |
| Additional Details | |
| Occupation | stockroom |
| Industry | Foundry |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 266 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | Stockroom |
| Township / Ward | Muskegon Hts |
| Est. Birth Year | ~1919 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Jack | Age | Birth yr |
|---|---|---|---|---|
| Vena Johnson | Daughter | — | 45 | ~1895 |
| Charles Mackey | Head | — | 81 | ~1859 |
| George Delambert | Other | — | 63 | ~1877 |
| Oscar Johnson | Other | — | 47 | ~1893 |
| Elmore Webster | Other | — | 25 | ~1915 |
| Jack Johnson | Son | — | 21 | ~1919 |
| Gerald Johnson | Son | — | 15 | ~1925 |
| Cora Mackey | Spouse | — | 73 | ~1867 |
Census Appearances
1920
Muskegon, Michigan
Other, age 1
Muskegon, Michigan · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Jack |
| Relationship to Head | Grandson |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1930
Muskegon, Michigan
Other, age 11
Muskegon, Michigan · implied b. ~1919 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Jack |
| Relationship to Head | Grandson |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Muskegon-County, Michigan
Son, age 21
Muskegon-County, Michigan · implied b. ~1919 — 8 household members
| Surname | Johnson |
| Given Name | Jack |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Muskegon Hts. |
| 1935 Residence (County) | Muskegon |
| Occupation | stockroom |
| Industry | Foundry |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 266 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Jack Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Mackey (~0.92 confidence) and mother Cora Mackey (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Mackey
b. ~1859
Source father
● Household
· direct · ~0.92
Mother
Cora Mackey
b. ~1867
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Jack Johnson
Son · 1940 · age 21 · b. ~1919 · Michigan
★ You are viewing this record
Sibling
Gerald Johnson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vena Johnson
Sibling · 1940 · age 45
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 — Muskegon-County, Michigan
Open full size
1940 US Federal Census — Muskegon-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01796-00378)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas L. Gregson | 24 | Lodger | Assembler | Michigan |
| 2 | John Blavich | 29 | Lodger | Bartender | Pennsylvania |
| 3 | Andrew Blavich | 24 | Lodger | Bartender | Pennsylvania |
| 4 | Alvie Wiggins | 42 | Head | Mail Man | Michigan |
| 5 | Alice Wiggins | 36 | Wife | — | Michigan |
| 6 | Lyla Jane Wiggins | 16 | daughter | — | Michigan |
| 7 | Thomas Edward Wiggins | 15 | son | — | Michigan |
| 8 | Raymond R. Wiggins | 12 | son | — | Michigan |
| 9 | Richard James Wiggins | 9 | son | — | Michigan |
| 10 | J. Addison Wiggins | 7 | son | — | Michigan |
| 11 | Robert Eugene Wiggins | 4 | son | — | Michigan |
| 12 | John David Wiggins | 2 | son | — | Michigan |
| 13 | Roy Nehmer | 24 | Lodger | Welder | Michigan |
| 14 | Daisy Nehmer | 23 | Lodger | — | Michigan |
| 15 | Hermon Peters | 39 | Lodger | — | Michigan |
| 16 | Edward Peterson | 43 | Lodger | Core Maker | Norway |
| 17 | James Summers | 46 | Lodger | Cook | Michigan |
| 18 | E. Elmer Knapp | 37 | Head | Assembler | Michigan |
| 19 | Florence X. Sterritt | 57 | Head | — | Michigan |
| 20 | Robert Sterritt | 12 | son | — | Michigan |
| 21 | Gerald Sterritt | 9 | son | — | Michigan |
| 22 | Henry Giroux | 63 | Head | Proprietor | Michigan |
| 23 | Anna Giroux | 60 | wife | — | Michigan |
| 24 | Elsie Marie Giroux | 27 | daughter | Teacher | Michigan |
| 25 | Charles Mackey | 81 | Head | — | Ohio |
| 26 | Cora Mackey | 73 | wife | — | Michigan |
| 27 | Oscar W. Johnson | 47 | son-in-law | Assembler | Michigan |
| 28 | Vena Johnson | 45 | daughter | — | Michigan |
| 29 | Jack Johnson THIS PERSON | 21 | son | Stockroom | Michigan |
| 30 | Gerald Johnson | 15 | son | — | Michigan |
| 31 | Elmore Webster | 25 | Lodger | Stock Room | Illinois |
| 32 | George Delambert | 63 | Lodger | Electrical Engineer | Minnesota |
| 33 | Joy Brooks | 62 | Head | Foreman | Michigan |
| 34 | Laura Brooks | 59 | wife | — | Canada |
| 35 | Ercel Joy Brooks | 21 | son | Accountant | Michigan |
| 36 | Chris Hansen | 56 | Head | Proprietor | Denmark |
| 37 | Eva Hansen | 56 | wife | — | Michigan |
| 38 | Doris Hansen | 18 | daughter | House Worker | Michigan |
| 39 | Willis Hansen | 18 | son | — | Michigan |
| 40 | John Misen | 64 | Head | Proprietor | Minnesota |
Pedigree Summary
Jack + 2 siblings
Gen 1 · 2 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)