RP
Robert Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cass-County, North Dakota
Our Model Tree links this Robert Peterson across the 1920, 1930 and 1940 US Censuses in Cass-County, North Dakota (XGBoost, ~Confirmed), with identified parents Martin & Lena — first a son (b.~1904), then head of a 2-person household.
Age 36
b. ~1904
Male
Son
Born: North Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cass-County, North Dakota |
| Surname | Peterson |
| Given Name | Robert W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | Fargo City |
| 1935 Residence (County) | Cass |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
| Township / Ward | Fargo City |
| Est. Birth Year | ~1904 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Anna Peterson | Head | — | 76 | ~1864 |
| Robert Peterson | Son | — | 36 | ~1904 |
Census Appearances
1920
Cass, North …
Son, age 16
Cass, North Dakota · implied b. ~1904 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Norwegian |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1930
Cass, North …
Son, age 26
Cass, North Dakota · implied b. ~1904 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read/Write | Yes |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1940
Cass-County, North …
Son, age 36
Cass-County, North Dakota · implied b. ~1904 — 2 household members
| Surname | Peterson |
| Given Name | Robert W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | Fargo City |
| 1935 Residence (County) | Cass |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
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 Robert Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Martin Peterson (~0.92 confidence) and mother Lena Peterson (~0.92 confidence) and mother Anna Peterson (~0.92 confidence) and mother Anna Peterson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Martin Peterson
b. ~1854
Source father
● Household
· direct · ~0.92
Mother
Lena Peterson
b. ~1863
Source mother
● Household
· direct · ~0.92
Mother
Anna Peterson
b. ~1864
Source mother
● Household
· direct · ~0.92
Mother
Anna Peterson
b. ~1864
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Peterson
Son · 1940 · age 36 · b. ~1904 · North Dakota
★ 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 — Cass-County, North Dakota
Open full size
1940 US Federal Census — Cass-County, North Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02996-00455)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arne D. Haasple | 62 | Head | — | Sweden |
| 2 | Ed G. Haasple | 33 | Son | Helper | North Dakota |
| 3 | Ethel V. Haasple | 28 | Daughter | Cook | North Dakota |
| 4 | Edith M. Haasple | 27 | Daughter | Helper | North Dakota |
| 5 | Sina O. Haugen | 80 | Head | — | Norway |
| 6 | Lester P. Janney | 48 | Head | Telegrapher | North Dakota |
| 7 | Lillian E. Janney | 47 | Wife | — | Minnesota |
| 8 | Mortimer C. Janney | 21 | Son | Truck Driver | North Dakota |
| 9 | Norma Vraa | 18 | Niece | Stenographer | Montana |
| 10 | Wilmot M. Lewis | 67 | Head | Operator | Canada-English |
| 11 | Grace Lewis | 63 | Wife | — | Canada-English |
| 12 | John A. Peterson | 55 | Head | Carpenter | Sweden |
| 13 | Myrtle Peterson | 43 | Wife | Housework | Minnesota |
| 14 | Gordon A. Peterson | 13 | Son | — | North Dakota |
| 15 | H. Alfred Ramberg | 56 | Head | Carpenter | Minnesota |
| 16 | Caroline Ramberg | 57 | Wife | — | Norway |
| 17 | Beatrice L. Ramberg | 28 | Daughter | Public Representative | Minnesota |
| 18 | Russell R. Ramberg | 23 | Son | Salesman | Minnesota |
| 19 | Ione L. Ramberg | 20 | Daughter | — | Minnesota |
| 20 | Alfred E. Ramberg | 16 | Son | — | Minnesota |
| 21 | Anna M. Peterson | 76 | Head | — | Norway |
| 22 | Robert W. Peterson THIS PERSON | 36 | Son | — | North Dakota |
| 23 | Matt Hoddiecke | 51 | Head | Fireman | Norway |
| 24 | Lillie E. Hoddiecke | 47 | Wife | — | North Dakota |
| 25 | Wilfred J. Enger | 33 | Head | Baker | Canada-French |
| 26 | Roberta R. Enger | 28 | Wife | — | North Dakota |
| 27 | Gloria J. Enger | 10 | Daughter | — | Minnesota |
| 28 | Leigh A. Freeman | 51 | Head | Service Manager | Canada-English |
| 29 | Mabel M. Freeman | 45 | Wife | — | Norway |
| 30 | Charles L. Freeman | 25 | Son | Window Trimmer | North Dakota |
| 31 | Ethel M. Freeman | 19 | Daughter | New Worker | North Dakota |
| 32 | Geraldine L. Freeman | 15 | Daughter | — | North Dakota |
| 33 | Richard L. Freeman | 11 | Son | — | North Dakota |
| 34 | Marjorie Ann Freeman | 9 | Daughter | — | North Dakota |
| 35 | Neil K. Freeman | 6 | Son | — | North Dakota |
| 36 | Norman R. Freeman | 6 | Son | — | North Dakota |
| 37 | Janet A. Freeman | 3 | Daughter | — | North Dakota |
| 38 | Helding A. Aasen | 33 | Head | Barber | Minnesota |
| 39 | Lucille V. Aasen | 27 | Wife | — | Minnesota |
| 40 | John D. Aasen | 4 | Son | — | North Dakota |
Pedigree Summary
Robert
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)