ON
Oscar Nelson — 1930 US Census Record
Model Tree available1930 United States Federal Census · Lewis And Clark, Montana
Our Model Tree links this Oscar Nelson across the 1910, 1920 and 1930 US Censuses in Lewis And Clark, Montana (XGBoost, ~Confirmed), with identified parents Alfred & Alfred — first a son (b.~1908), then head of a 7-person household.
Age 22
b. ~1908
Male
Son
Born: Montana
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Lewis And Clark, Montana |
| Surname | Nelson |
| Given Name | Oscar A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Additional Details | |
| Occupation | Book binder |
| Industry | Printing Comp. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Occupation | Book Binder |
| Township / Ward | Helena City |
| Est. Birth Year | ~1908 |
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 1930 census.
| Name | Relation to head | Relative to Oscar | Age | Birth yr |
|---|---|---|---|---|
| Evelyn Knapp | Daughter | — | 28 | ~1902 |
| Alfred Nelson | Head | — | 63 | ~1867 |
| Pauline Knapp | Other | — | 6 | ~1924 |
| Paul Knapp | Other | — | 36 | ~1894 |
| Hattie Knapp | Other | — | 13 | ~1917 |
| Oscar Nelson | Son | — | 22 | ~1908 |
| Mary Nelson | Spouse | — | 57 | ~1873 |
Census Appearances
1910
Lewis Clark, …
Son, age 2
Lewis Clark, Montana · implied b. ~1908 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1920
Lewis And …
Son, age 12
Lewis And Clark, Montana · implied b. ~1908 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Student |
| Industry | Grad School |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1930
Lewis And …
Son, age 22
Lewis And Clark, Montana · implied b. ~1908 — 7 household members
| Surname | Nelson |
| Given Name | Oscar A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Book binder |
| Industry | Printing Comp. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
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 Oscar Nelson across 3 US Census years (1910, 1920 and 1930) in 2 locations, using XGBoost record linkage. Identified parents: father Alfred Nelson (~0.92 confidence) and father Alfred Nelson (~0.92 confidence) and father Gilbert Nelson (~0.92 confidence) and mother Mary Nelson (~0.92 confidence) and mother Mary Nelson (~0.92 confidence) and mother Mary Nelson (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alfred Nelson
b. ~1867
Source father
● Household
· direct · ~0.92
Father
Alfred Nelson
b. ~1868
Source father
● Household
· direct · ~0.92
Father
Gilbert Nelson
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Mary Nelson
b. ~1873
Source mother
● Household
· direct · ~0.92
Mother
Mary Nelson
b. ~1873
Source mother
● Household
· direct · ~0.92
Mother
Mary Nelson
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Nelson
Son · 1930 · age 22 · b. ~1908 · Montana
★ You are viewing this record
Sibling
Evelyn Knapp
Sibling · 1930 · age 28
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
1930 US Federal Census — Lewis And Clark, Montana
Open full size
1930 US Federal Census — Lewis And Clark, Montana
Page Contents
50 people indexed on this census page (ia:1930:15thcensus1258unit:0236)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Elizabeth Wardlaw | 16 | Daughter | — | Montana |
| 52 | Jean Wardlaw | 12 | Daughter | — | Montana |
| 53 | Henry F. Hagler | 40 | Head | Bond Salesman | Iowa |
| 54 | Blanche R. Hagler | 35 | Wife | — | Iowa |
| 55 | Harriet Hagler | 13 | Daughter | — | S. Dakota |
| 56 | Dorothy M. Hagler | 11 | Daughter | — | Montana |
| 57 | Donald R. Hagler | 8 | Son | — | Montana |
| 58 | Moses D. Rider | 69 | Head | — | New York |
| 59 | Stephen E. Rider | 29 | Son | — | Montana |
| 60 | Lora E. Rider | 27 | Daughter-in-law | — | Alabama |
| 61 | Octavia Rider Young | 38 | Daughter | Teacher Of Violin | Montana |
| 62 | Watson W. Fields | 74 | Head | Bailiff | Canada English |
| 63 | Rachel A. Fields | 69 | Wife | — | Canada English |
| 64 | Rita L. Fields | 44 | Daughter | Stenographer | North Dakota |
| 65 | Carl E. Kretlow | 33 | Head | Book Keeper | Montana |
| 66 | Alice Kretlow | 29 | Wife | — | Montana |
| 67 | Alice Kretlow | 7 | Daughter | — | Montana |
| 68 | Edward Kretlow | 5 | Son | — | Montana |
| 69 | Frank D. Bevans | 33 | Head | Accountant | Montana |
| 70 | Alice S. Bevans | 31 | Wife | Stenographer | Washington |
| 71 | Barbara A. Bevans | 8 | Daughter | — | Montana |
| 72 | Alice J. Bevans | 4 | Daughter | — | Montana |
| 73 | Mary A. Gillespie | 63 | Housekeeper | Nurse | Minnesota |
| 74 | Herbert A. Schneider | 33 | Head | Printer | Montana |
| 75 | Anna Schneider | 32 | Wife | Book Keeper | Montana |
| 76 | William Haferburg | 70 | Head | Stationary Engineer | Germany |
| 77 | Marie Haferburg | 63 | Wife | — | Germany |
| 78 | George C. Bayha | 64 | Head | Deputy Clerk | Missouri |
| 79 | Jessie G. Bayha | 59 | Wife | — | Missouri |
| 80 | Jessie Bayha | 31 | Daughter | Teacher | Montana |
| 81 | James M. Lewis | 66 | Head | Atty At Law | Pennsylvania |
| 82 | Nora Lewis | 67 | Wife | — | Illinois |
| 83 | Marion W. Hodge | 61 | Head | Asst Chief Clerk | Illinois |
| 84 | Alberta Hodge | 54 | Wife | — | Canada English |
| 85 | Ralph C. Hodge | 24 | Son | Draftsman | Montana |
| 86 | Charlotte Strobel | 63 | Head | — | Pennsylvania |
| 87 | Ralph Strobel | 27 | Son | — | Montana |
| 88 | Arthur B. Canary | 57 | Head | Printer | Kansas |
| 89 | Stella Canary | 55 | Wife | — | Indiana |
| 90 | George A. Canary | 19 | Son | Messenger | Pennsylvania |
| 91 | Alice Canary | 13 | Daughter | — | Montana |
| 92 | Alfred Nelson | 63 | Head | Fireman | Sweden |
| 93 | Mary Nelson | 57 | Wife | — | Sweden |
| 94 | Oscar A. Nelson THIS PERSON | 22 | Son | Book Binder | Montana |
| 95 | Paul C. Knapp | 36 | Son-in-law | Welder | Michigan |
| 96 | Evelyn M. Knapp | 28 | Daughter | — | Montana |
| 97 | Hattie M. Knapp | 13 | Gr. Daughter | — | Montana |
| 98 | Pauline M. Knapp | 6 | Gr. Daughter | — | Montana |
| 99 | Frank W. Panton | 32 | Head | Yard Foreman | Montana |
| 100 | Mary R. Panton | 25 | Wife | — | Iowa |
Pedigree Summary
Oscar + 1 sibling
Gen 1 · 6 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)