JK
John Knox — 1940 US Census Record
Model Tree available1940 United States Federal Census · Maricopa-County, Arizona
Our Model Tree links this John Knox across the 1920, 1930 and 1940 US Censuses in Maricopa-County, Arizona (XGBoost, ~Confirmed), with identified parents Martha — first a head (b.~1911), then head of a 3-person household.
Age 29
b. ~1911
Male
Head
Born: Arizona
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Maricopa-County, Arizona |
| Surname | Knox |
| Given Name | John Stanley |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Arizona |
| 1935 Residence (City) | Phoenix |
| 1935 Residence (County) | Maricopa |
| Additional Details | |
| Occupation | Inspector |
| Industry | Arizona Farm Credit Association |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 1780 |
| Highest Grade | Hs 4 |
| 1935 Residence | Arizona |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
| Occupation | Inspector |
| Township / Ward | Supervisorial District No 1 Pt |
| Est. Birth Year | ~1911 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Julia Knox | Spouse | — | 30 | ~1910 |
| John Knox | Head | — | 29 | ~1911 |
| Harriet Knox | Daughter | — | 5 | ~1935 |
Census Appearances
1920
Maricopa, Arizona
Son, age 9
Maricopa, Arizona · implied b. ~1911 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knox |
| Given Name | John D |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Arizona |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Canada |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
1930
Maricopa, Arizona
Son, age 19
Maricopa, Arizona · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knox |
| Given Name | John S. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Arizona |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Canada |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
1940
Maricopa-County, Arizona
Head, age 29
Maricopa-County, Arizona · implied b. ~1911 — 3 household members
| Surname | Knox |
| Given Name | John Stanley |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Arizona |
| 1935 Residence (City) | Phoenix |
| 1935 Residence (County) | Maricopa |
| Occupation | Inspector |
| Industry | Arizona Farm Credit Association |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 1780 |
| Highest Grade | Hs 4 |
| 1935 Residence | Arizona |
| 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 Knox across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Martha Knox (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Martha Knox
b. ~1874
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Knox
Head · 1940 · age 29 · b. ~1911 · 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 — Maricopa-County, Arizona
Open full size
1940 US Federal Census — Maricopa-County, Arizona
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00106-00934)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Hubert Massey | 21 | Head | Operator | Oklahoma |
| 42 | Stella Pearl Massey | 18 | Wife | — | Oklahoma |
| 43 | Walter R. Miller | 46 | Head | Laborer | Texas |
| 44 | Montie Lee Miller | 34 | Wife | — | Texas |
| 45 | Walter Edwin Miller | 16 | Son | — | Arizona |
| 46 | Ruby Romola Miller | 11 | Daughter | — | Arizona |
| 47 | James Allen Miller | 3 | Son | — | Arizona |
| 48 | Myrtle May Russell | 18 | Daughter | Housework | Arizona |
| 49 | Alice Lorine Russell | 0 | Granddaughter | — | Arizona |
| 50 | Robert D. Embree | 41 | Head | Foreman | Iowa |
| 51 | Grace E. Embree | 41 | Wife | — | Ohio |
| 52 | Anna Lee Embree | 17 | Daughter | — | Ohio |
| 53 | Donald R. Embree | 13 | Son | — | Ohio |
| 54 | Margaret Grunder | 24 | Lodger | Graduate Nurse | Wyoming |
| 55 | William Bert Patterson | 57 | Head | Dairy Man | Colorado |
| 56 | Emily Alice Patterson | 47 | Wife | House Work | Missouri |
| 57 | Ray C. Patterson | 16 | Son | New Worker | Colorado |
| 58 | Roy B. Patterson | 11 | Son | — | Colorado |
| 59 | Cecil Mcdowell | 24 | Head | Laborer | Arkansas |
| 60 | Helen L. Mcdowell | 19 | Wife | — | Missouri |
| 61 | Genevieve L. Mcdowell | 2 | Daughter | — | Arizona |
| 62 | John Stanley Knox THIS PERSON | 29 | Head | Inspector | Arizona |
| 63 | Julia G. Knox | 30 | Wife | — | Texas |
| 64 | Harriet Knox | 5 | Daughter | — | Arizona |
| 65 | Joe F. Finley | 27 | Head | Farmer | Missouri |
| 66 | Alma Finley | 23 | Wife | — | Oklahoma |
| 67 | Della Joyce Finley | 4 | Daughter | — | Arizona |
| 68 | David Harley Finley | 15 | Son | — | Arizona |
| 69 | Joe Ollie | 42 | Head | Salesman | Syria |
| 70 | Ida Ollie | 37 | Wife | — | Arkansas |
| 71 | Philip Joe Ollie | 17 | Son | — | Oklahoma |
| 72 | Joe Holland | 73 | Father in law | — | Kentucky |
| 73 | Chester Holland | 14 | Brother in law | — | Arkansas |
| 74 | Jess M. Jordan | 38 | Head | Farmer | Arkansas |
| 75 | Lula E. Jordan | 31 | Wife | — | Missouri |
| 76 | Leonard L. Jordan | 11 | Son | — | Arizona |
| 77 | Vernon J. Jordan | 9 | Son | — | Arizona |
| 78 | Virginia Lee Jordan | 7 | Daughter | — | Arizona |
| 79 | Shirley Vera Jordan | 3 | Daughter | — | Arizona |
| 80 | Marvin W. Evan | 36 | Head | Laborer | Oklahoma |
Pedigree Summary
John
Gen 1 · 1 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)