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Clarence Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mahnomen-County, Minnesota
Our Model Tree links this Clarence Nelson across the 1920, 1930 and 1940 US Censuses in Mahnomen-County, Minnesota (XGBoost, ~Confirmed), with identified parents Nels & Anna — first a head (b.~1913), then head of a 4-person household.
Age 27
b. ~1913
Male
Head
Born: Minnesota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mahnomen-County, Minnesota |
| Surname | Nelson |
| Given Name | Clarence |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | Lagard |
| 1935 Residence (County) | Mahnomen |
| Additional Details | |
| Occupation | Farm laborer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 400 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Farm Laborer |
| Township / Ward | Lagard |
| Est. Birth Year | ~1913 |
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 Clarence | Age | Birth yr |
|---|---|---|---|---|
| Darryl Nelson | Daughter | — | 1 | ~1939 |
| Clarence Nelson | Head | — | 27 | ~1913 |
| N Nelson | Other | — | 72 | ~1868 |
| Clara Nelson | Spouse | — | 17 | ~1923 |
Census Appearances
1920
Mahnomen, Minnesota
Son, age 7
Mahnomen, Minnesota · implied b. ~1913 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Norway |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Mahnomen, Minnesota
Son, age 17
Mahnomen, Minnesota · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Mahnomen-County, Minnesota
Head, age 27
Mahnomen-County, Minnesota · implied b. ~1913 — 4 household members
| Surname | Nelson |
| Given Name | Clarence |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | Lagard |
| 1935 Residence (County) | Mahnomen |
| Occupation | Farm laborer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 400 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Clarence Nelson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Nels Nelson (~0.92 confidence) and mother Anna Nelson (~0.92 confidence) and mother Anna Nelson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Nels Nelson
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Anna Nelson
b. ~1873
Source mother
● Household
· direct · ~0.92
Mother
Anna Nelson
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Clarence Nelson
Head · 1940 · age 27 · b. ~1913 · Minnesota
★ 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 — Mahnomen-County, Minnesota
Open full size
1940 US Federal Census — Mahnomen-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01936-00091)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clarence Nelson THIS PERSON | 27 | Head | Farm Laborer | Minnesota |
| 42 | Clara Nelson | 17 | Wife | — | Minnesota |
| 43 | Darryl Nelson | 1 | Daughter | — | Minnesota |
| 44 | N. P. Nelson | 72 | Father | — | Sweden |
| 45 | John Jr. Blattenbauer | 34 | Head | Common Labor | South Dakota |
| 46 | Christine A. Blattenbauer | 34 | Wife | — | North Dakota |
| 47 | Buddy Blattenbauer | 6 | Son | — | Minnesota |
| 48 | Catherine Blattenbauer | 5 | Daughter | — | Minnesota |
| 49 | Caroline Blattenbauer | 4 | Daughter | — | Minnesota |
| 50 | Christina Blattenbauer | 2 | Daughter | — | Minnesota |
| 51 | Gustave Guenther | 48 | Head | Farm Operator | Minnesota |
| 52 | Christina Guenther | 44 | Wife | — | Minnesota |
| 53 | Virginia Spaeth | 21 | Daughter | — | Minnesota |
| 54 | George Guenther | 13 | Son | Road Worker | Minnesota |
| 55 | Raymond Guenther | 11 | Son | — | Minnesota |
| 56 | Robert Guenther | 5 | Son | — | Minnesota |
| 57 | Henry Spaeth | 23 | Son-in-law | Common Labor | Minnesota |
| 58 | Dennis Spaeth | 0 | Grandson | — | Minnesota |
| 59 | Anton Auer | 54 | Head | Farm Operator | Minnesota |
| 60 | Anna Auer | 48 | Wife | — | Minnesota |
| 61 | Helen Auer | 17 | Daughter | Road Worker | Minnesota |
| 62 | Raymond Auer | 15 | Son | Common Labor | Minnesota |
| 63 | Gladys Auer | 13 | Daughter | — | Minnesota |
| 64 | Donna May Auer | 12 | Daughter | — | Minnesota |
| 65 | James Auer | 9 | Son | — | Minnesota |
| 66 | George Auer | 8 | Son | — | Minnesota |
| 67 | Herbert Auer | 6 | Son | — | Minnesota |
| 68 | Mary Anne Auer | 4 | Daughter | — | Minnesota |
| 69 | Rosemary Auer | 2 | Daughter | — | Minnesota |
| 70 | Paul Auer | 19 | Son | Common Labor | Minnesota |
| 71 | Frank Hart | 48 | Head | Farm Operator | Minnesota |
| 72 | Hazel Hart | 39 | Wife | Teacher | Iowa |
| 73 | Deloris Hart | 10 | Daughter | — | Minnesota |
| 74 | Mona Hart | 6 | Daughter | — | Minnesota |
| 75 | Gerald Hart | 46 | Brother | Common Labor | Minnesota |
| 76 | Edith Wauck | 26 | Lodger | Teacher | Minnesota |
| 77 | John Jr. Haider | 42 | Head | Farm Operator | Minnesota |
| 78 | Rose Haider | 39 | Wife | — | South Dakota |
| 79 | Melvin Haider | 15 | Son | — | Minnesota |
| 80 | Valeria Haider | 11 | Daughter | — | Minnesota |
Pedigree Summary
Clarence
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)