JC
James Cox — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marquette-County, Michigan
Our Model Tree links this James Cox across the 1920, 1930 and 1940 US Censuses in Marquette-County, Michigan (XGBoost, ~Confirmed), with identified parents James & Mildred — first a son (b.~1915), then head of a 6-person household.
Age 25
b. ~1915
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marquette-County, Michigan |
| Surname | Cox |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Negaunee |
| 1935 Residence (County) | Marquette |
| Additional Details | |
| Occupation | laborer |
| Industry | city street department |
| Class of Worker | PW |
| Hours Worked | 2 |
| Income (1939) | 60 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | Laborer |
| Township / Ward | Negaunee |
| Est. Birth Year | ~1915 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Lorraine Cox | Daughter | — | 20 | ~1920 |
| Mildred Cox | Head | — | 44 | ~1896 |
| John Johns | Other | — | 35 | ~1905 |
| Earl Cox | Son | — | 24 | ~1916 |
| Gerald Cox | Son | — | 15 | ~1925 |
| James Cox | Son | — | 25 | ~1915 |
Census Appearances
1920
Marquette, Michigan
Son, age 6
Marquette, Michigan · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | England |
| Mother's Birthplace | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1930
Marquette, Michigan
Son, age 15
Marquette, Michigan · implied b. ~1915 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | England |
| Mother's Birthplace | Michigan |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Marquette-County, Michigan
Son, age 25
Marquette-County, Michigan · implied b. ~1915 — 6 household members
| Surname | Cox |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Negaunee |
| 1935 Residence (County) | Marquette |
| Occupation | laborer |
| Industry | city street department |
| Class of Worker | PW |
| Hours Worked | 2 |
| Income (1939) | 60 |
| Highest Grade | No 6 |
| 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 James Cox across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Cox (~0.92 confidence) and mother Mildred Cox (~0.92 confidence) and mother Mildred Cox (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Cox
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Mildred Cox
b. ~1893
Source mother
● Household
· direct · ~0.92
Mother
Mildred Cox
b. ~1896
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Cox
Son · 1940 · age 25 · b. ~1915 · Michigan
★ You are viewing this record
Sibling
Earl Cox
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lorraine Cox
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Cox
Sibling · 1940 · age 15
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 — Marquette-County, Michigan
Open full size
1940 US Federal Census — Marquette-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01787-00295)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Gertrude Chapman | 25 | wife | Seamstress | Michigan |
| 42 | Neil Chapman | 5 | son | — | Michigan |
| 43 | Allan Chapman | 3 | son | — | Michigan |
| 44 | Bruce Chapman | 1 | son | — | Michigan |
| 45 | Dorothy Chapman | 33 | sister | — | Michigan |
| 46 | Charles Vincent | 52 | head | Surface Laborer | Michigan |
| 47 | Elizabeth Vincent | 48 | wife | — | Michigan |
| 48 | Betty Vincent | 21 | daughter | — | Michigan |
| 49 | Lena Gratzie | 87 | head | — | Germany |
| 50 | William Johns | 31 | head | Laborer | Michigan |
| 51 | Mary Johns | 28 | wife | — | Michigan |
| 52 | Margaret Johns | 7 | daughter | — | Michigan |
| 53 | John E. Johns | 0 | son | — | Michigan |
| 54 | Mildred Cox | 44 | head | Janitress | Michigan |
| 55 | James Cox THIS PERSON | 25 | son | Laborer | Michigan |
| 56 | Earl Cox | 24 | son | Delivery Boy | Michigan |
| 57 | Lorraine Cox | 20 | daughter | New Worker | Michigan |
| 58 | Gerald Cox | 15 | son | — | Michigan |
| 59 | John Johns | 35 | brother | Sampleman | Michigan |
| 60 | Godfred Hornblum | 57 | head | Laborer | Canada-English |
| 61 | Brunella Hornblum | 56 | wife | — | Michigan |
| 62 | John E. Kuce | 60 | head | Miner | Michigan |
| 63 | George H. Kuce | 58 | son | Laborer | Michigan |
| 64 | Cleo Saine | 45 | head | Truck Driver | Michigan |
| 65 | Florence Saine | 45 | wife | — | Michigan |
| 66 | Verona Saine | 30 | sister | Seamstress | Michigan |
| 67 | Marie G. Gronlund | 39 | head | Supervisor | California |
| 68 | William Gronlund | 12 | son | — | Illinois |
| 69 | Sarah Garrett | 70 | mother | — | California |
| 70 | John Burns | 34 | lodger | Miner | Michigan |
| 71 | Swan Horpela | 52 | head | Powderman | Finland |
| 72 | Ida Horpela | 32 | wife | — | Michigan |
| 73 | Harold Balowaara | 36 | head | Miner | Michigan |
| 74 | Aleda Balowaara | 27 | wife | — | Michigan |
| 75 | Harold Jr. Balowaara | 0 | son | 0 | Michigan |
| 76 | Emanuel Thomas | 33 | head | Hoist Engineer | Michigan |
| 77 | Irene Thomas | 29 | wife | — | Michigan |
| 78 | Marilyn Thomas | 9 | daughter | — | Michigan |
| 79 | Nancy Thomas | 4 | daughter | — | Michigan |
| 80 | Sally Hanson | 46 | head | — | Michigan |
Pedigree Summary
James + 3 siblings
Gen 1 · 3 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)