HN
Harold Nelson — 1920 US Census Record
Model Tree available1920 United States Federal Census · Alameda, California
Our Model Tree links this Harold Nelson across the 1900, 1910 and 1920 US Censuses in Alameda, California (XGBoost, ~Confirmed), with identified parents Edward & Mary — first a son (b.~1897), then head of a 10-person household.
Age 23
b. ~1897
Male
Son
Born: California
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Alameda, California |
| Surname | Nelson |
| Given Name | Harold C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Norway |
| Mother's Birthplace | California |
| Additional Details | |
| Occupation | Shipping clerk |
| Industry | Ironworks |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Shipping Clerk |
| Township / Ward | Oakland City |
| Est. Birth Year | ~1897 |
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.
10 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Nelson | Daughter | — | 11 | ~1909 |
| Jeanette Nelson | Daughter | — | 27 | ~1893 |
| Ethel Nelson | Daughter | — | 24 | ~1896 |
| Edward Nelson | Head | — | 62 | ~1858 |
| Frank Nelson | Son | — | 26 | ~1894 |
| Harold Nelson | Son | — | 23 | ~1897 |
| Ray Nelson | Son | — | 21 | ~1899 |
| Edward Nelson | Son | — | 30 | ~1890 |
| Walter Nelson | Son | — | 17 | ~1903 |
| Mary Nelson | Spouse | — | 45 | ~1875 |
Census Appearances
1900
Alameda, California
Son, age 4
Alameda, California · implied b. ~1896 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Harold L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | California |
| Birth Month | June |
| Birth Year | 1896 |
| Father's Birthplace | Norway |
| Mother's Birthplace | California |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1910
Alameda, California
Son, age 13
Alameda, California · implied b. ~1897 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Norway |
| Mother's Birthplace | California |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
Alameda, California
Son, age 23
Alameda, California · implied b. ~1897 — 10 household members
| Surname | Nelson |
| Given Name | Harold C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Norway |
| Mother's Birthplace | California |
| Occupation | Shipping clerk |
| Industry | Ironworks |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 (1900, 1910 and 1920) in Alameda, California, using XGBoost record linkage. Identified parents: father Edward Nelson (~0.92 confidence) and mother Mary Nelson (~0.92 confidence) and mother Mary Nelson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Edward Nelson
b. ~1858
Source father
● Household
· direct · ~0.92
Mother
Mary Nelson
b. ~1868
Source mother
● Household
· direct · ~0.92
Mother
Mary Nelson
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Nelson
Son · 1920 · age 23 · b. ~1897 · California
★ You are viewing this record
Sibling
Walter Nelson
Sibling · 1920 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ray Nelson
Sibling · 1920 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Nelson
Sibling · 1920 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Nelson
Sibling · 1920 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jeanette Nelson
Sibling · 1920 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Nelson
Sibling · 1920 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ethel Nelson
Sibling · 1920 · age 24
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
1920 US Federal Census — Alameda, California
Open full size
1920 US Federal Census — Alameda, California
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu088unit:0407)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Harry B. Seybold | 31 | Boarder | Conductor | Kansas |
| 52 | George Kavanagh | 32 | Head | Manager | Nevada |
| 53 | Mary A. Kavanagh | 28 | Wife | — | Michigan |
| 54 | Helen P. Kavanagh | 3 | Daughter | — | California |
| 55 | George C. Kavanagh | 0 | Son | — | California |
| 56 | William A. Bennett | 40 | Head | Superintendent | Missouri |
| 57 | Pearl F. Bennett | 35 | Wife | — | California |
| 58 | Annie M. Warren | 55 | Mother-in-law | — | California |
| 59 | William H. Hommel | 47 | Head | Cabinetmaker | Michigan |
| 60 | Mary A. Hommel | 34 | Wife | — | California |
| 61 | Joseph J. Hommel | 41 | Brother | Stock Clerk | California |
| 62 | Carmel D. Hommel | 12 | Boarder | — | California |
| 63 | Levi B. Thompson | 47 | Head | Cabinetmaker | Canada |
| 64 | Carrie Thompson | 48 | Wife | — | Canada |
| 65 | William H. Olsen | 43 | Head | Laborer | Minnesota |
| 66 | Margaret A. Olsen | 43 | Wife | — | California |
| 67 | Edward Nelson | 62 | Head | Stationary Engineer | Norway |
| 68 | Mary A. Nelson | 45 | Wife | — | California |
| 69 | Edward J. Nelson | 30 | Son | Stationary Engineer | District of Columbia |
| 70 | Jeanette J. Nelson | 27 | Daughter | — | District of Columbia |
| 71 | Frank O. Nelson | 26 | Son | Accountant | California |
| 72 | Ethel M. Nelson | 24 | Daughter | Stenographer | California |
| 73 | Harold C. Nelson THIS PERSON | 23 | Son | Shipping Clerk | California |
| 74 | Ray Nelson | 21 | Son | Electrician | California |
| 75 | Walter H. Nelson | 17 | Son | — | California |
| 76 | Dorothy G. Nelson | 11 | Daughter | — | California |
| 77 | John H. Wertman | 48 | Head | Conductor | Pennsylvania |
| 78 | Ida E. Wertman | 47 | Wife | Milliner | Nevada |
| 79 | Edward J. O'Malia | 43 | Head | Manager | Minnesota |
| 80 | Mary E. O'Malia | 37 | Wife | — | California |
| 81 | Ruth G. O'Malia | 14 | Daughter | — | California |
| 82 | William H. Schoppe | 43 | Head | Laborer | Missouri |
| 83 | Clara K. Schoppe | 43 | Wife | — | Germany |
| 84 | William H. Schoppe | 20 | Son | Machinist | Iowa |
| 85 | Herman Block | 40 | Head | Shipcarpenter | Germany |
| 86 | Elsie Block | 37 | Wife | — | Montana |
| 87 | Carl E. Block | 7 | Son | — | California |
| 88 | Fredrick H. Block | 3 | Son | — | California |
| 89 | Emil Frith | 38 | Boarder | Laborer | Germany |
| 90 | John H. Luthge | 37 | Head | Mover | Holstein |
| 91 | Mamie E. Luthge | 33 | Wife | — | Illinois |
| 92 | Bernard J. Luthge | 12 | Son | — | California |
| 93 | Iona M. Luthge | 10 | Daughter | — | California |
| 94 | John H. Luthge | 8 | Son | — | California |
| 95 | Anna E. Luthge | 6 | Daughter | — | California |
| 96 | William H. Luthge | 4 | Son | — | California |
| 97 | Edna E. Luthge | 1 | Daughter | — | California |
| 98 | Sheila M. Winston | 42 | Head | — | Wisconsin |
| 99 | Ruth M. Winston | 16 | Daughter | — | California |
| 100 | Isabell D. Winston | 14 | Daughter | — | California |
Related Census Records
Pedigree Summary
Harold + 7 siblings
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 1920 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)