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Harold Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Harold Nelson across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Christian & Gustaf — first a head (b.~1912), then head of a 4-person household.
Age 28
b. ~1912
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Nelson |
| Given Name | Harold C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Woburn City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Machine Operator |
| Industry | Bakery |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Machine Operator |
| Township / Ward | Woburn City |
| Est. Birth Year | ~1912 |
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 Harold | Age | Birth yr |
|---|---|---|---|---|
| Louis Nelson | Daughter | — | 1 | ~1939 |
| Harold Nelson | Head | — | 28 | ~1912 |
| Harold Nelson | Son | — | 5 | ~1935 |
| Alice Nelson | Spouse | — | 24 | ~1916 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 7
Middlesex, Massachusetts · implied b. ~1913 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Harold E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Massachusetts |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 18
Middlesex, Massachusetts · implied b. ~1912 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Harold E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Massachusetts |
| Occupation | Grand Clerk |
| Industry | Wholesale Grocery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 28
Middlesex-County, Massachusetts · implied b. ~1912 — 4 household members
| Surname | Nelson |
| Given Name | Harold C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Woburn City |
| 1935 Residence (County) | Middlesex |
| Occupation | Machine Operator |
| Industry | Bakery |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Christian Nelson (~0.92 confidence) and father Gustaf Nelson (~0.92 confidence) and mother Abel Nelson (~0.92 confidence) and mother Ethel Nelson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Christian Nelson
b. ~1871
Source father
● Household
· direct · ~0.92
Father
Gustaf Nelson
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Abel Nelson
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Ethel Nelson
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Nelson
Head · 1940 · age 28 · b. ~1912 · Massachusetts
★ 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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01622-00518)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Buonanno | 16 | Daughter | — | Massachusetts |
| 42 | Anna Buonanno | 11 | Daughter | — | Massachusetts |
| 43 | Anthony Buonanno | 8 | Son | — | Massachusetts |
| 44 | Carmine A Cenerazzo | 39 | Head | Laborer | Italy |
| 45 | Jenny M Cenerazzo | 36 | Wife | — | Italy |
| 46 | Louis J. Cenerazzo | 17 | Son | — | Italy |
| 47 | Augustine Cenerazzo | 10 | Son | — | Massachusetts |
| 48 | Cecila Cenerazzo | 9 | Daughter | — | Massachusetts |
| 49 | John Cenerazzo | 7 | Son | — | Massachusetts |
| 50 | James Cenerazzo | 5 | Son | — | Massachusetts |
| 51 | Anthony Christofera | 45 | Head | — | Italy |
| 52 | Angie Christofera | 44 | Wife | — | Italy |
| 53 | Jenny Christofera | 18 | Daughter | Finisher | Massachusetts |
| 54 | Peter Christofera | 15 | Son | — | Massachusetts |
| 55 | Mary Christofera | 14 | Daughter | — | Massachusetts |
| 56 | Anthony Christofera | 12 | Son | — | Massachusetts |
| 57 | Josephine Christofera | 11 | Daughter | — | Massachusetts |
| 58 | Harold C. Nelson THIS PERSON | 28 | Head | Machine Operator | Massachusetts |
| 59 | Alice E Nelson | 24 | Wife | — | Massachusetts |
| 60 | Harold Nelson | 5 | Son | — | Massachusetts |
| 61 | Louis Ann Nelson | 1 | Daughter | — | Massachusetts |
| 62 | Joseph Carchidi | 51 | Head | Stationary Fireman | Italy |
| 63 | Mary Carchidi | 35 | Wife | — | Italy |
| 64 | Mary J Laughlin | 64 | Head | — | Irish Free State |
| 65 | Daniel M Laughlin | 32 | Son | Laborer | Massachusetts |
| 66 | Thomas Queen | 53 | Head | Laborer | Massachusetts |
| 67 | Bertha E. Queen | 48 | Wife | — | Massachusetts |
| 68 | Thomas H. Queen | 28 | Son | Shipper | Massachusetts |
| 69 | Edward J. Queen | 25 | Son | Tacker | Massachusetts |
| 70 | Robert P. Queen | 22 | Son | Painter | Massachusetts |
| 71 | Marilyn E Queen | 17 | Daughter | — | Massachusetts |
| 72 | Frank A Queen | 15 | Son | — | Massachusetts |
| 73 | Evelyn E Queen | 13 | Daughter | — | Massachusetts |
| 74 | James Queen | 12 | Son | — | Massachusetts |
| 75 | John Stevens | 49 | Head | Shorer | Italy |
| 76 | Francis Stevens | 54 | Wife | — | Italy |
| 77 | Settimo Solazzi | 69 | Head | — | Italy |
| 78 | Mary Solazzi | 59 | Wife | — | Italy |
| 79 | John J. Solazzi | 18 | Son | Laborer | Massachusetts |
| 80 | Americo E. Solazzi | 17 | Son | — | Massachusetts |
Related Census Records
Pedigree Summary
Harold
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)