AP
Arthur Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Joseph-County, Indiana
Our Model Tree links this Arthur Peterson across the 1920, 1930 and 1940 US Censuses in St.-Joseph-County, Indiana (XGBoost, ~Confirmed), with identified parents Andrew & Andrew — first a head (b.~1905), then head of a 4-person household.
Age 35
b. ~1905
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Joseph-County, Indiana |
| Surname | Peterson |
| Given Name | Arthur W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | South Bend |
| 1935 Residence (County) | St. Joseph |
| Additional Details | |
| Occupation | Serviceman |
| Industry | Mfg. Automotive |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2000 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Serviceman |
| Township / Ward | South Bend |
| Est. Birth Year | ~1905 |
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 Arthur | Age | Birth yr |
|---|---|---|---|---|
| Phillis Peterson | Daughter | — | 10 | ~1930 |
| Marilyn Peterson | Daughter | — | 3 | ~1937 |
| Arthur Peterson | Head | — | 35 | ~1905 |
| Helen Peterson | Spouse | — | 33 | ~1907 |
Census Appearances
1920
St Joseph, …
Son, age 14
St Joseph, Indiana · implied b. ~1906 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Arthur |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
St Joseph, …
Son, age 25
St Joseph, Indiana · implied b. ~1905 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Arthur |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Indiana |
| Age at First Marriage | 21 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Engineer |
| Industry | Auto Accessories |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
St.-Joseph-County, Indiana
Head, age 35
St.-Joseph-County, Indiana · implied b. ~1905 — 4 household members
| Surname | Peterson |
| Given Name | Arthur W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | South Bend |
| 1935 Residence (County) | St. Joseph |
| Occupation | Serviceman |
| Industry | Mfg. Automotive |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2000 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Arthur Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Andrew Peterson (~0.92 confidence) and father Andrew Peterson (~0.92 confidence) and mother Emelia Peterson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Andrew Peterson
b. ~1864
Source father
● Household
· direct · ~0.92
Father
Andrew Peterson
b. ~1864
Source father
● Household
· direct · ~0.92
Mother
Emelia Peterson
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Arthur Peterson
Head · 1940 · age 35 · b. ~1905 · Indiana
★ 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 — St.-Joseph-County, Indiana
Open full size
1940 US Federal Census — St.-Joseph-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01135-00244)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Harry Young | 45 | Head | Sales Manager | Iowa |
| 42 | Lucy E. Young | 41 | Wife | — | Iowa |
| 43 | Marcia E. Young | 6 | Daughter | — | Iowa |
| 44 | Kenneth L. Packard | 31 | Son-in-law | Chauffeur | Wisconsin |
| 45 | Louis W. Whitmore | 34 | Lodger | Chauffeur | Illinois |
| 46 | Russell E. Perkey | 44 | Head | Engineer | Indiana |
| 47 | Rebecca G. Perkey | 45 | Wife | — | Illinois |
| 48 | Arthur W. Peterson THIS PERSON | 35 | Head | Serviceman | Indiana |
| 49 | Helen M. Peterson | 33 | Wife | — | Indiana |
| 50 | Phillis J. Peterson | 10 | Daughter | — | Indiana |
| 51 | Marilyn J. Peterson | 3 | Daughter | — | Indiana |
| 52 | Leo H. Mahowald | 30 | Head | Owner | N. Dakota |
| 53 | Dorothy A. Mahowald | 31 | Wife | — | Illinois |
| 54 | Robert E. Mahowald | 8 | Son | — | N. Dakota |
| 55 | Dorothy A. Mahowald | 5 | Daughter | — | N. Dakota |
| 56 | Betty J. Mahowald | 3 | Daughter | — | Indiana |
| 57 | Harry S. Richey | 53 | Head | Barber | Ohio |
| 58 | Lena M. Richey | 50 | Wife | — | Illinois |
| 59 | Ben Horowitz | 55 | Head | Store Owner | Austria |
| 60 | Jeanette Horowitz | 51 | Wife | — | Illinois |
| 61 | Maurice Horowitz | 22 | Son | — | Indiana |
| 62 | Shirly H. Horowitz | 21 | Daughter | — | Indiana |
| 63 | — | None | — | — | — |
| 64 | — | None | — | — | — |
| 65 | — | None | — | — | — |
| 66 | — | None | — | — | — |
| 67 | — | None | — | — | — |
| 68 | Anthony E. Ermenaker | 32 | Head | Contractor | Indiana |
| 69 | Ethel Ermenaker | 31 | Wife | — | Michigan |
| 70 | Edward A. Ermenaker | 9 | Son | — | Indiana |
| 71 | Margaret J. Ermenaker | 7 | Daughter | — | Indiana |
| 72 | Thomas L. Ermenaker | 4 | Son | — | Indiana |
| 73 | Peter R. Young | 35 | Lodger | Salesman | Indiana |
| 74 | Mildred E. Young | 21 | Lodger | — | Indiana |
| 75 | John A. Petervilla | 45 | Head | Spanish Interpreter | Argentina |
| 76 | Ruth E. Petervilla | 25 | Wife | — | Michigan |
| 77 | Juan R. Petervilla | 7 | Son | — | Indiana |
| 78 | Dolores R. Petervilla | 5 | Daughter | — | Indiana |
| 79 | Roland R. Petervilla | 1 | Son | — | Indiana |
| 80 | — | None | — | — | — |
Pedigree Summary
Arthur
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)