DP
Donald Peterson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Winnebago-County, Illinois
Our Model Tree links this Donald Peterson across the 1930 and 1940 US Censuses in Winnebago-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 7-person household.
Age 18
b. ~1922
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Winnebago-County, Illinois |
| Surname | Peterson |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Rockford City |
| 1935 Residence (County) | Winnebago |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Rockford City |
| Est. Birth Year | ~1922 |
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 Donald | Age | Birth yr |
|---|---|---|---|---|
| Donald Peterson | Son | — | 18 | ~1922 |
| Dorothy Peterson | Daughter | — | 20 | ~1920 |
| Arvid Peterson | Head | — | 49 | ~1891 |
| Tennesa Peterson | Spouse | — | 46 | ~1894 |
| Herbert Peterson | Son | — | 22 | ~1918 |
| Joan Peterson | Daughter | — | 8 | ~1932 |
| Pauline Peterson | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Winnebago, Illinois
Son, age 8
Winnebago, Illinois · implied b. ~1922 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Nebraska |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Winnebago-County, Illinois
Son, age 18
Winnebago-County, Illinois · implied b. ~1922 — 7 household members
| Surname | Peterson |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Rockford City |
| 1935 Residence (County) | Winnebago |
| Income (1939) | 0 |
| 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 Donald Peterson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Donald Peterson
Son · 1940 · age 18 · b. ~1922 · Illinois
★ You are viewing this record
Sibling
Pauline Peterson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Peterson
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joan Peterson
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Herbert Peterson
Sibling · 1940 · age 22
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 — Winnebago-County, Illinois
Open full size
1940 US Federal Census — Winnebago-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00915-00122)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Hilda | 58 | Wife | — | Sweden |
| 42 | Extra | None | Line | — | — |
| 43 | Vern L Maguire | 35 | Head | Drill Press Operator | Illinois |
| 44 | Marilyn Maguire | 11 | Daughter | — | Illinois |
| 45 | Roger Maguire | 8 | Son | — | Illinois |
| 46 | Emma Stonewall | 64 | Mother | — | Sweden |
| 47 | Marie D Orstad | 69 | Head | — | Norway |
| 48 | Gertie Johnson | 73 | Sister | — | Norway |
| 49 | Homer Cogswell | 50 | Head | Bus Operator | Illinois |
| 50 | Jennie Cogswell | 51 | Wife | — | Illinois |
| 51 | Richard E Cogswell | 8 | Son | — | Illinois |
| 52 | Ernest Peterson | 61 | Head | Carpenter | Sweden |
| 53 | Ida Peterson | 57 | Wife | — | Sweden |
| 54 | Edna Peterson | 25 | Daughter | Office Clerk | Illinois |
| 55 | Lloyd Peterson | 23 | Son | Carpenter | Illinois |
| 56 | Kenneth Peterson | 20 | Son | Draftsman | Illinois |
| 57 | Robert Peterson | 18 | Son | Service Station Attendant | Illinois |
| 58 | Olaf B Bell | 68 | Head | Finisher | Norway |
| 59 | Emma Bell | 64 | Wife | — | Sweden |
| 60 | O. D. Josephson | 45 | Head | Foundry Supply Salesman | Illinois |
| 61 | Helen Josephson | 39 | Wife | — | Illinois |
| 62 | Lucy Josephson | 12 | Daughter | — | Illinois |
| 63 | Arvid Peterson | 49 | Head | Sec. & Treas. | Illinois |
| 64 | Tennesa Peterson | 46 | Wife | — | Nebraska |
| 65 | Herbert A Peterson | 22 | Son | — | Illinois |
| 66 | Dorothy A Peterson | 20 | Daughter | — | Illinois |
| 67 | Donald Peterson THIS PERSON | 18 | Son | — | Illinois |
| 68 | Pauline Peterson | 15 | Daughter | — | Illinois |
| 69 | Joan Peterson | 8 | Daughter | — | Illinois |
| 70 | Andrew Swanson | 60 | Head | Steel Treater | Sweden |
| 71 | Elizabeth S Swanson | 57 | Wife | — | Sweden |
| 72 | Helen J Swanson | 20 | Daughter | Factory Worker | Iowa |
| 73 | Kenneth M Swanson | 11 | Son | — | Illinois |
| 74 | Carl J Granquist | 36 | Head | Advertising Manager | Illinois |
| 75 | Roxane Granquist | 23 | Wife | Nurse | Illinois |
| 76 | Alrik Thunberg | 56 | Head | Maintenance | Sweden |
| 77 | Amy Thunberg | 56 | Wife | — | Sweden |
| 78 | E. H. Carlson | 50 | Head | Proprietor | Illinois |
| 79 | Alice Carlson | 47 | Wife | — | Illinois |
| 80 | David A Carlson | 22 | Son | — | Illinois |
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)