JM
James Mcdonald — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sangamon-County, Illinois
Our Model Tree links this James Mcdonald across the 1920, 1930 and 1940 US Censuses in Sangamon-County, Illinois (XGBoost, ~Confirmed), with identified parents John & Ellen — first a son (b.~1912), then head of a 4-person household.
Age 28
b. ~1912
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sangamon-County, Illinois |
| Surname | McDonald |
| Given Name | James H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Sangamon |
| Additional Details | |
| Occupation | Manager |
| Industry | Tire Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Manager |
| Township / Ward | Springfield |
| Est. Birth Year | ~1912 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Helen Bernet | Daughter | — | 24 | ~1916 |
| Helen Mcdonald | Head | — | 52 | ~1888 |
| William Bernet | Other | — | 24 | ~1916 |
| James Mcdonald | Son | — | 28 | ~1912 |
Census Appearances
1920
Sangamon, Illinois
Son, age 8
Sangamon, Illinois · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Sangamon, Illinois
Son, age 19
Sangamon, Illinois · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mc Donald |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Service man |
| Industry | Tire shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Sangamon-County, Illinois
Son, age 28
Sangamon-County, Illinois · implied b. ~1912 — 4 household members
| Surname | McDonald |
| Given Name | James H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Sangamon |
| Occupation | Manager |
| Industry | Tire Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| 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 Mcdonald across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Mcdonald (~0.92 confidence) and mother Ellen Mcdonald (~0.92 confidence) and mother Helen Mcdonald (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Mcdonald
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Ellen Mcdonald
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Helen Mcdonald
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Mcdonald
Son · 1940 · age 28 · b. ~1912 · Illinois
★ You are viewing this record
Sibling
Helen Bernet
Sibling · 1940 · age 24
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 — Sangamon-County, Illinois
Open full size
1940 US Federal Census — Sangamon-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00884-00201)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Shirley Ann Buck | 5 | Daughter | — | Illinois |
| 2 | Gwendolyn Buck | 3 | Daughter | — | Illinois |
| 3 | Chester Jr. Buck | 0 | Son | — | Illinois |
| 4 | Raymond Burger | 35 | Head | Laborer | Illinois |
| 5 | Irene B. Burger | 29 | Wife | — | Illinois |
| 6 | Clara Burger | 13 | Daughter | — | Illinois |
| 7 | Russell Burger | 11 | Son | — | Illinois |
| 8 | Norma Jan Burger | 5 | Daughter | — | Illinois |
| 9 | John Burger | 4 | Son | — | Illinois |
| 10 | Raymond Jr. Burger | 2 | Son | — | Illinois |
| 11 | James Burger | 0 | Son | — | Illinois |
| 13 | Nicholas Altana | 58 | Head | Digger | Italy |
| 14 | Anthony Hollin | 41 | Head | Salesman | Kansas |
| 15 | John D. Hollin | 79 | Father | — | Yugoslavia |
| 16 | David Mackey | 34 | Head | Sign Hanger | Illinois |
| 17 | Rachel R. Mackey | 32 | Wife | — | Illinois |
| 18 | Helen Mcdonald | 52 | Head | Stitcher | Illinois |
| 19 | James H. Mcdonald THIS PERSON | 28 | Son | Manager | Illinois |
| 20 | Helen E. Bernet | 24 | Daughter | Stitcher | Illinois |
| 21 | William Bernet | 24 | Son-in-law | Laborer | Illinois |
| 22 | Charles Pfeifer | 35 | Head | Club Manager | Illinois |
| 23 | Hazel M. Pfeifer | 35 | Wife | — | Illinois |
| 24 | Hazel Louise Pfeifer | 11 | Daughter | — | Illinois |
| 25 | Willard Offerd | 40 | Head | Clerk | Illinois |
| 26 | Martha D. Offerd | 30 | Wife | — | Illinois |
| 27 | Westide Offerd | 11 | Daughter | — | Illinois |
| 28 | Frederick Offerd | 7 | Son | — | Illinois |
| 29 | Mylis Offerd | 4 | Daughter | — | Indiana |
| 30 | Jacob Offerd | 1 | Son | — | Illinois |
| 31 | Harry Rainey | 57 | Head | Stationary Fireman | Illinois |
| 32 | Susie Rainey | 56 | Wife | — | Illinois |
| 33 | Jess Page | 71 | Brother-in-law | — | Illinois |
| 34 | Bernard Lester | 52 | Head | Digger | Illinois |
| 35 | Elizabeth Lester | 50 | Wife | — | Oklahoma |
| 36 | Margaret Taloy | 56 | Lodger | — | Illinois |
| 37 | William Elling | 65 | Head | — | Indiana |
| 38 | Ella R. Elling | 65 | Wife | — | Illinois |
| 39 | Kenneth Elling | 32 | Son | Attendant | Illinois |
| 40 | Edward H. Elling | 28 | Son | Laborer | Illinois |
Pedigree Summary
James + 1 sibling
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)