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John Mcmillan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Yavapai-County, Arizona
Our Model Tree links this John Mcmillan across the 1920, 1930 and 1940 US Censuses in Yavapai-County, Arizona (XGBoost, ~Confirmed), with identified parents Geo & Alice — first a head (b.~1905), then head of a 5-person household.
Age 35
b. ~1905
Male
Head
Born: Arizona
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Yavapai-County, Arizona |
| Surname | McMillan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Arizona |
| 1935 Residence (City) | Jerome town |
| 1935 Residence (County) | Yavapai |
| Additional Details | |
| Occupation | hoisting engine |
| Industry | copper mine |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 2119 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
| Occupation | Hoisting Engine |
| Township / Ward | Jerome Town |
| Est. Birth Year | ~1905 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Mcmillan | Head | — | 35 | ~1905 |
| Patricia Mcmillan | Daughter | — | 9 | ~1931 |
| Elizabeth Mcmillan | Spouse | — | 34 | ~1906 |
| Lois Mcmillan | Daughter | — | 12 | ~1928 |
| Georgia Mcmillan | Daughter | — | 11 | ~1929 |
Census Appearances
1920
Yavapai, Arizona
Son, age 17
Yavapai, Arizona · implied b. ~1903 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMillan |
| Given Name | John E |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Arizona |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Arizona |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
1930
Yavapai, Arizona
Head, age 25
Yavapai, Arizona · implied b. ~1905 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMillan |
| Given Name | John E |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Arizona |
| Age at First Marriage | 24 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Arizona |
| Occupation | Switchman |
| Industry | Copper Mine |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| Radio Set | R |
| Veteran | No |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
1940
Yavapai-County, Arizona
Head, age 35
Yavapai-County, Arizona · implied b. ~1905 — 5 household members
| Surname | McMillan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Arizona |
| 1935 Residence (City) | Jerome town |
| 1935 Residence (County) | Yavapai |
| Occupation | hoisting engine |
| Industry | copper mine |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 2119 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Geo Mcmillan (~0.92 confidence) and mother Alice Mcmillan (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Geo Mcmillan
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Alice Mcmillan
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mcmillan
Head · 1940 · age 35 · b. ~1905 · Arizona
★ 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 — Yavapai-County, Arizona
Open full size
1940 US Federal Census — Yavapai-County, Arizona
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00114-00591)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Olga Moore | 13 | Daughter | — | Arizona |
| 42 | Robert Emmett Moore | 27 | Head | Clerk | Arizona |
| 43 | Nora Moore | 26 | Wife | — | Arizona |
| 44 | Barbara Moore | 3 | Daughter | — | Arizona |
| 45 | Patricia Moore | 1 | Daughter | — | Arizona |
| 46 | Robert E. Jr. Moore | 0 | Son | — | Arizona |
| 47 | Merle Hagar | 48 | Head | Projectionist | Massachusetts |
| 48 | Jennie E. Hagar | 52 | Wife | — | Rhode Island |
| 49 | Roland Hagar | 16 | Son | — | Massachusetts |
| 50 | Sidney Hagar | 13 | Son | — | California |
| 51 | Barbara Hagar | 10 | Daughter | — | California |
| 52 | Hazel Warren | 45 | Head | Music Teacher | Nebraska |
| 53 | John Mcmillan THIS PERSON | 35 | Head | Hoisting Engine | Arizona |
| 54 | Elizabeth Mcmillan | 34 | Wife | — | Arizona |
| 55 | Lois Jean Mcmillan | 12 | Daughter | — | Arizona |
| 56 | Georgia Lee Mcmillan | 11 | Daughter | — | Arizona |
| 57 | Patricia Mcmillan | 9 | Daughter | — | Arizona |
| 58 | Antonio Muniz | 53 | Head | — | Arizona |
| 59 | B. Pilar Muniz | 29 | Son | Mucker | Arizona |
| 60 | Benny Muniz | 15 | Son | — | Arizona |
| 61 | Consuela Garcia | 14 | Daughter | — | Arizona |
| 62 | Eusebio Encinas | 54 | Head | W.P.A. Laborer | New Mexico |
| 63 | Petra Encinas | 52 | Wife | — | New Mexico |
| 64 | Belen Encinas | 20 | Son | N.Y.A. Assistant | Arizona |
| 65 | Joe D. Gonzalez | 36 | Head | Drill Runner | Arizona |
| 66 | Eloisa Gonzalez | 28 | Wife | — | Mexico |
| 67 | Joe Gonzalez | 1 | Son | — | Arizona |
| 68 | Trinidad Jimenez | 36 | Head | Car Man | Mexico |
| 69 | Rita Jimenez | 21 | Wife | — | Mexico |
| 70 | Trinidad Jr. Jimenez | 0 | Son | — | Arizona |
| 71 | Dennis Regan | 42 | Head | Watchman | Montana |
| 72 | Nieves Regan | 28 | Wife | — | Arizona |
| 73 | Eleanor Regan | 13 | Daughter | — | Arizona |
| 74 | Dennis Jr. Regan | 10 | Son | — | Arizona |
| 75 | Patricia Regan | 6 | Daughter | — | Arizona |
| 76 | Carol Regan | 4 | Daughter | — | Arizona |
| 77 | Tony V. Acosta | 25 | Head | Miner | Arizona |
| 78 | Hortense Acosta | 20 | Wife | — | Arizona |
| 79 | Ronald Acosta | 2 | Son | — | Arizona |
| 80 | Arnold Acosta | 1 | Son | — | Arizona |
Pedigree Summary
John
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)