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John Mcmillan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Genesee-County, Michigan
Our Model Tree links this John Mcmillan across the 1930 and 1940 US Censuses in Genesee-County, Michigan (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 10-person household.
Age 17
b. ~1923
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Genesee-County, Michigan |
| Surname | McMillan |
| Given Name | John R. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Mundy |
| 1935 Residence (County) | Genesee |
| Additional Details | |
| Class of Worker | 25 |
| Hours Worked | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Mundy |
| Est. Birth Year | ~1923 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Ida Mcmillan | Daughter | — | 21 | ~1919 |
| Chester Mcmillan | Son | — | 24 | ~1916 |
| Myra Mcmillan | Daughter | — | 18 | ~1922 |
| Olga Mcmillan | Daughter | — | 15 | ~1925 |
| Willis Mcmillan | Son | — | 22 | ~1918 |
| Edna Mcmillan | Head | — | 51 | ~1889 |
| Louisa Mcmillan | Daughter | — | 12 | ~1928 |
| John Mcmillan | Son | — | 17 | ~1923 |
| Raymond Garratt | Other | — | 30 | ~1910 |
| James Mcmillan | Son | — | 14 | ~1926 |
Census Appearances
1930
Genesee, Michigan
Son, age 7
Genesee, Michigan · implied b. ~1923 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMillan |
| Given Name | John R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | No |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Genesee-County, Michigan
Son, age 17
Genesee-County, Michigan · implied b. ~1923 — 10 household members
| Surname | McMillan |
| Given Name | John R. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Mundy |
| 1935 Residence (County) | Genesee |
| Class of Worker | 25 |
| Hours Worked | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| 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 John Mcmillan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mcmillan
Son · 1940 · age 17 · b. ~1923 · Michigan
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Sibling
Chester Mcmillan
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ida Mcmillan
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Myra Mcmillan
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Olga Mcmillan
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louisa Mcmillan
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mcmillan
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Willis Mcmillan
Sibling · 1940 · age 22
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 — Genesee-County, Michigan
Open full size
1940 US Federal Census — Genesee-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01750-00799)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Barbara M. Pierson | 19 | Daughter | — | Canada-English |
| 42 | Louise B. Pierson | 15 | Daughter | — | Michigan |
| 43 | Harriett Pierson | 14 | Daughter | — | Michigan |
| 44 | Harold L. Teetzel | 55 | Head | Inspector | Canada-English |
| 45 | Nellie M. Teetzel | 55 | Wife | — | Michigan |
| 46 | Albert Hyde | 26 | Hired man | Farm Laborer | Michigan |
| 47 | Josephine Hyde | 20 | Wife | Housework | Missouri |
| 48 | Mark M. Watson | 63 | Head | — | Michigan |
| 49 | Mabel Watson | 63 | Wife | — | Michigan |
| 50 | Walter C. Watson | 25 | Son | — | Michigan |
| 51 | William D. Crawford | 76 | Head | Optometrist | Michigan |
| 52 | Emma R. Crawford | 70 | Wife | — | Michigan |
| 53 | Floyd M. Shaft | 38 | Head | Factory Work | Michigan |
| 54 | Mary G. Shaft | 37 | Wife | — | Michigan |
| 55 | Bernie Shaft | 18 | Daughter | New Worker | Michigan |
| 56 | Otis Shaft | 9 | Son | — | Michigan |
| 57 | Frank Shaft | 6 | Son | — | Michigan |
| 58 | Arthur E. Robins | 55 | Head | Run Gas Sta. | Indiana |
| 59 | Edna O. Mcmillan | 51 | Head | — | Illinois |
| 60 | Chester J. Mcmillan | 24 | Son | Factory Work | Illinois |
| 61 | Willis E. Mcmillan | 22 | Son | Factory Work | Illinois |
| 62 | Ida A. Mcmillan | 21 | Daughter | Beauty Operator | Illinois |
| 63 | Myra F. Mcmillan | 18 | Daughter | File Clerk | Michigan |
| 64 | John R. Jr. Mcmillan THIS PERSON | 17 | Son | — | Michigan |
| 65 | Olga E. Mcmillan | 15 | Daughter | — | Michigan |
| 66 | James E. Mcmillan | 14 | Son | — | Michigan |
| 67 | Louisa A. Mcmillan | 12 | Daughter | — | Michigan |
| 68 | Raymond Garratt | 30 | Boarder | Sailor | Michigan |
| 69 | John B. Smith | 52 | Head | Factory Work | Tennessee |
| 70 | Bessie Smith | 48 | Wife | — | Tennessee |
| 71 | Raymond Smith | 22 | Son | Farm Hand | Missouri |
| 72 | Harry Smith | 20 | Son | Manager | Missouri |
| 73 | Clyde Smith | 17 | Son | — | Missouri |
| 74 | Cherry Smith | 14 | Daughter | — | Missouri |
| 75 | Joyce L. Smith | 10 | Daughter | — | Michigan |
| 76 | Rosemary Smith | 5 | Daughter | — | Michigan |
| 77 | Robert C. Gilbert | 43 | Head | Factory Work | Illinois |
| 78 | Lulu J. Gilbert | 52 | Wife | — | Tennessee |
| 79 | Howard Gillespie | 50 | Head | Proprietor | Michigan |
| 80 | Eliza J. Gillespie | 47 | Wife | — | Michigan |
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)