JC
James Cunningham — 1940 US Census Record
Model Tree available1940 United States Federal Census · Boone-County, Illinois
Our Model Tree links this James Cunningham across the 1920, 1930 and 1940 US Censuses in Boone-County, Illinois (XGBoost, ~Confirmed), with identified parents James & Samuel — first a son (b.~1920), then head of a 7-person household.
Age 20
b. ~1920
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Boone-County, Illinois |
| Surname | Cunningham |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Belvidere city |
| 1935 Residence (County) | Boone |
| Additional Details | |
| Occupation | Plumbing |
| Industry | Private Business |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Plumbing |
| Township / Ward | Belvidere City |
| Est. Birth Year | ~1920 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mclean | Daughter | — | 23 | ~1917 |
| James Cunningham | Head | — | 54 | ~1886 |
| Donald Mclean | Other | — | 26 | ~1914 |
| Jean Cunningham | Other | — | 87 | ~1853 |
| James Cunningham | Son | — | 20 | ~1920 |
| Michael Mclean | Son | — | 4 | ~1936 |
| Nellie Cunningham | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Boone, Illinois
Son, age
Boone, Illinois · implied b. ~1920 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cunningham |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Boone, Illinois
Son, age 10
Boone, Illinois · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cunningham |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Boone-County, Illinois
Son, age 20
Boone-County, Illinois · implied b. ~1920 — 7 household members
| Surname | Cunningham |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Belvidere city |
| 1935 Residence (County) | Boone |
| Occupation | Plumbing |
| Industry | Private Business |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Cunningham across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Cunningham (~0.92 confidence) and father Samuel Cunningham (~0.92 confidence) and father James Cunningham (~0.92 confidence) and mother Nellie Cunningham (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Cunningham
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Samuel Cunningham
b. ~1886
Source father
● Household
· direct · ~0.92
Father
James Cunningham
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Nellie Cunningham
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Cunningham
Son · 1940 · age 20 · b. ~1920 · Illinois
★ You are viewing this record
Sibling
Michael Mclean
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mclean
Sibling · 1940 · age 23
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 — Boone-County, Illinois
Open full size
1940 US Federal Census — Boone-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00760-00191)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mable Wolff | 38 | Wife | — | Iowa |
| 2 | William Wolff | 10 | Son | — | Illinois |
| 3 | Jack Wolff | 6 | Son | — | Illinois |
| 4 | Samuel Eastman | 62 | Head | Merchant | Illinois |
| 5 | Lillian Eastman | 54 | Wife | — | Illinois |
| 6 | Jane Eastman | 21 | Daughter | — | California |
| 7 | James Cunningham | 54 | Head | Plumbing | Pennsylvania |
| 8 | Nellie Cunningham | 52 | Wife | — | Pennsylvania |
| 9 | James Cunningham THIS PERSON | 20 | Son | Plumbing | Illinois |
| 10 | Donald Mclean | 26 | Son-in-law | Estimator | Illinois |
| 11 | Margaret Mclean | 23 | Daughter | — | Illinois |
| 12 | Michael Mclean | 4 | Son | — | Illinois |
| 13 | Jean Cunningham | 87 | Mother | Plumbing | Pennsylvania |
| 14 | David James | 32 | Head | Doctor | Illinois |
| 15 | Helen James | 32 | Wife | — | Illinois |
| 16 | Jean James | 6 | Daughter | — | Illinois |
| 17 | Joan James | 6 | Daughter | — | Illinois |
| 18 | David James | 2 | Son | — | Illinois |
| 19 | Patrick Crawford | 66 | Head | Machinist | Illinois |
| 20 | May Crawford | 64 | Wife | — | Michigan |
| 21 | Ellen Alexander | 60 | Sister-in-law | — | Michigan |
| 22 | Anna Downs | 75 | Head | — | Illinois |
| 23 | Neighbor End Of Block 617 - Frank | None | M | Bank | — |
| 24 | Nellie Morse | 57 | Head | — | Illinois |
| 25 | Andrew Markley | 82 | Lodger | Physician | Ohio |
| 26 | Edward Merritt | 40 | Lodger | — | Illinois |
| 27 | Catherine Merritt | 32 | Lodger | Office Work | Missouri |
| 28 | Louise Moore | 32 | Lodger | Milliner | Illinois |
| 29 | Victor Moore | 23 | Lodger | Mechanic | Illinois |
| 30 | Arthur Moore | 70 | Head | Coal Dealer | Maine |
| 31 | Helen Moore | 63 | Wife | — | Iowa |
| 32 | Merritt Miller | 23 | Head | Milling Machine | S. Dakota |
| 33 | Rosata Miller | 20 | Wife | — | Iowa |
| 34 | Gertrude Beckington | 46 | Lodger | — | Illinois |
| 35 | Elizabeth Baker | 77 | Head | — | Germany |
| 36 | Edna James | 35 | Lodger | Filling Station Attendant | Illinois |
| 37 | Gerard Stephen | 46 | Head | Osteopathic Physician | Wisconsin |
| 38 | Alice Stephen | 47 | Wife | — | Illinois |
| 39 | Harold Johnson | 44 | Head | Electric Welder | Illinois |
| 40 | Ethel Johnson | 45 | Wife | — | Illinois |
Pedigree Summary
James + 2 siblings
Gen 1 · 4 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)