HN
Harold Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Belmont-County, Ohio
Our Model Tree links this Harold Nelson across the 1920, 1930 and 1940 US Censuses in Belmont-County, Ohio (XGBoost, ~Confirmed), with identified parents Allen & Ola — first a son (b.~1911), then head of a 6-person household.
Age 29
b. ~1911
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Belmont-County, Ohio |
| Surname | Nelson |
| Given Name | Harold A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Colerain |
| 1935 Residence (County) | Belmont |
| Additional Details | |
| Occupation | Laborer |
| Industry | Tin Mill |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 575 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Laborer |
| Township / Ward | Colerain |
| Est. Birth Year | ~1911 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Maxine Nelson | Daughter | — | 16 | ~1924 |
| Rosana Nelson | Daughter | — | 11 | ~1929 |
| Allen Nelson | Head | — | 63 | ~1877 |
| Dora Scott | Other | — | 52 | ~1888 |
| Harold Nelson | Son | — | 29 | ~1911 |
| Ola Nelson | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Belmont, Ohio
Son, age 9
Belmont, Ohio · implied b. ~1911 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Belmont, Ohio
Son, age 19
Belmont, Ohio · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | Millworker |
| Industry | Tin Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Belmont-County, Ohio
Son, age 29
Belmont-County, Ohio · implied b. ~1911 — 6 household members
| Surname | Nelson |
| Given Name | Harold A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Colerain |
| 1935 Residence (County) | Belmont |
| Occupation | Laborer |
| Industry | Tin Mill |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 575 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Harold Nelson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Allen Nelson (~0.92 confidence) and mother Ola Nelson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Allen Nelson
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Ola Nelson
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Nelson
Son · 1940 · age 29 · b. ~1911 · Ohio
★ You are viewing this record
Sibling
Maxine Nelson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rosana Nelson
Sibling · 1940 · age 11
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 — Belmont-County, Ohio
Open full size
1940 US Federal Census — Belmont-County, Ohio
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-03028-00054)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Wilson A. Hague | 48 | Head | Farmer | Ohio |
| 42 | Jessie C. Hague | 45 | Wife | — | Ohio |
| 43 | Nancy A. Hague | 4 | Daughter | — | Ohio |
| 44 | Pauline Peter | 16 | Maid | Maid | Ohio |
| 45 | Anna Kaminski | 18 | Maid | Maid | Ohio |
| 46 | Kenneth D. Morris | 48 | Head | Screw Boy | Pennsylvania |
| 47 | Esther E. Morris | 44 | Wife | — | Indiana |
| 48 | Donald H. Worthington | 33 | Head | Trucker | West Virginia |
| 49 | Sarah E. Worthington | 26 | Daughter | — | West Virginia |
| 50 | Elma J. Worthington | 3 | Daughter | — | Ohio |
| 51 | Esther H. Worthington | 1 | Daughter | — | Ohio |
| 52 | John W. Kennedy | 74 | Head | — | Ohio |
| 53 | Audrey B. Kennedy | 72 | Wife | — | Ohio |
| 54 | Alfred H. Kennedy | 38 | Son | Farmer | Ohio |
| 55 | Fred Myers | 68 | Head | Farmer | Ohio |
| 56 | Mary Myers | 64 | Wife | — | Ohio |
| 57 | Walter F. Wise | 37 | Head | Miner | Ohio |
| 58 | Goldie A. Wise | 34 | Wife | — | Ohio |
| 59 | Mildred E. Wise | 15 | Daughter | — | Ohio |
| 60 | Walter G. Jr. Wise | 13 | Son | — | Ohio |
| 61 | Marion M. Wise | 11 | Daughter | — | Ohio |
| 62 | Albert T. Wise | 10 | Son | — | Ohio |
| 63 | Robert T. Wise | 7 | Son | — | Ohio |
| 64 | Donald G. Wise | 2 | Son | — | Ohio |
| 65 | Howard Springer | 51 | Head | Laborer | Ohio |
| 66 | Emma L. Springer | 41 | Wife | — | Ohio |
| 67 | Lila L. Springer | 19 | Daughter | — | Ohio |
| 68 | Nancy J. Springer | 12 | Daughter | — | Ohio |
| 69 | Leroy Mercer | 59 | Head | Farmer | Ohio |
| 70 | Elizabeth Mercer | 50 | Wife | — | Iowa |
| 71 | Marjorie Mercer | 26 | Daughter | Teacher | Pennsylvania |
| 72 | Thomas Mercer | 24 | Son | Farmer | Pennsylvania |
| 73 | Allen E. Nelson | 63 | Head | Miner | Ohio |
| 74 | Ola J. Nelson | 57 | Wife | — | Ohio |
| 75 | Harold A. Nelson THIS PERSON | 29 | Son | Laborer | Ohio |
| 76 | Maxine M. Nelson | 16 | Daughter | — | Ohio |
| 77 | Rosana J. Nelson | 11 | Daughter | — | Ohio |
| 78 | Dora B. Scott | 52 | Sister-in-law | — | Ohio |
Pedigree Summary
Harold + 2 siblings
Gen 1 · 2 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)