ON
Oscar Nelson — 1930 US Census Record
Model Tree available1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Oscar Nelson across the 1910, 1920, 1930 and 1940 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed), with identified parents Alvina & Otto — first a head (b.~1899), then head of a 4-person household.
Age 31
b. ~1899
Male
Head
Born: Massachusetts
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Nelson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 26 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Sweden |
| Additional Details | |
| Occupation | Const. Engineer |
| Industry | Contractor |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 8500 |
| Radio Set | R |
| Veteran | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Const. Engineer |
| Township / Ward | Reading Town Pt Of |
| Est. Birth Year | ~1899 |
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 1930 census.
| Name | Relation to head | Relative to Oscar | Age | Birth yr |
|---|---|---|---|---|
| Barbara Nelson | Daughter | — | 4 | ~1926 |
| Joan Nelson | Daughter | — | 2 | ~1928 |
| Oscar Nelson | Head | — | 31 | ~1899 |
| Ruth Nelson | Other | — | 29 | ~1901 |
Census Appearances
1910
Middlesex, Massachusetts
Son, age 10
Middlesex, Massachusetts · implied b. ~1900 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Oscar E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Norway |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Middlesex, Massachusetts
Son, age 21
Middlesex, Massachusetts · implied b. ~1899 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Oscar W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Norwegian |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Head, age 31
Middlesex, Massachusetts · implied b. ~1899 — 4 household members
| Surname | Nelson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 26 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Sweden |
| Occupation | Const. Engineer |
| Industry | Contractor |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 8500 |
| Radio Set | R |
| Veteran | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 40
Middlesex-County, Massachusetts · implied b. ~1900 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Oscar T. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Everett City |
| 1935 Residence (County) | Middlesex |
| Occupation | pipe layer |
| Industry | sewer project |
| Class of Worker | GW |
| Hours Worked | 10 |
| Income (1939) | 380 |
| Highest Grade | H-1 |
| 1935 Residence | Same house |
| 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 Oscar Nelson across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Alvina Nelson (~0.92 confidence) and father Otto Nelson (~0.92 confidence) and mother Anna Nelson (~0.92 confidence) and father Andrew Nelson (~0.92 confidence) and mother Martha Nelson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Alvina Nelson
b. ~1871
Source mother
● Household
· direct · ~0.92
Father
Otto Nelson
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Anna Nelson
b. ~1873
Source mother
● Household
· direct · ~0.92
Father
Andrew Nelson
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Martha Nelson
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Nelson
Head · 1930 · age 31 · b. ~1899 · Massachusetts
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel927:0501)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Henry R. Lester | 44 | Head | Foreman | Massachusetts |
| 2 | Elsie M. Lester | 38 | Wife-H | — | England |
| 3 | Gardiner A. Lester | 15 | Son | — | Massachusetts |
| 4 | Sherman P. Lester | 13 | Son | — | Massachusetts |
| 5 | Virginia R. Lester | 9 | Daughter | — | Massachusetts |
| 6 | Mary E. Walker | 58 | Head | — | Canada-English |
| 7 | Phoebe W. Martin | 12 | Nephew | — | Massachusetts |
| 8 | Orlando C. Crosby | 56 | Head | Accountant | Pennsylvania |
| 9 | Carrie A. Crosby | 47 | Wife-H | — | Pennsylvania |
| 10 | Robert C. Al. Crosby | 20 | Son | — | Massachusetts |
| 11 | Arthur E. Al. Crosby | 18 | Son | — | Massachusetts |
| 12 | Eleanor G. Crosby | 13 | Daughter | — | Massachusetts |
| 13 | Allan B. Campbell | 35 | Head | Salesman | Massachusetts |
| 14 | Carolyn B. Campbell | 33 | Wife-H | — | Massachusetts |
| 15 | Carolyn E. Campbell | 5 | Daughter | — | Massachusetts |
| 16 | Margaret J. Campbell | 1 | Daughter | — | Massachusetts |
| 17 | Ernest E. Alward | 57 | Head | Part Owner | Canada-English |
| 18 | Alma H. Alward | 42 | Wife-H | — | Massachusetts |
| 19 | Doris E. Alward | 2 | Daughter | — | Massachusetts |
| 20 | Walter S. Hopkins | 68 | Head | — | Massachusetts |
| 21 | Emma J. Hopkins | 54 | Wife-H | — | Massachusetts |
| 22 | Walter S. Jr. Hopkins | 24 | Son | Farmer | Massachusetts |
| 23 | Evelyn Hopkins | 21 | Daughter | — | Massachusetts |
| 24 | Charles H. Burton | 63 | Head | — | Massachusetts |
| 25 | Stella M. Burton | 63 | Wife-H | — | Canada-English |
| 26 | — | None | — | — | — |
| 27 | Nathaniel G. Goodwin | 70 | Head | Clerk | Canada-English |
| 28 | Carrie L. Goodwin | 69 | Wife-H | — | Massachusetts |
| 29 | Myron Goodwin | 24 | Son | Clerk | Massachusetts |
| 30 | Gerard R. Rollins | 27 | Head | Salesman | Massachusetts |
| 31 | Maude E. Rollins | 25 | Wife-H | — | Maine |
| 32 | Gerard R. Rollins | 0 | Son | — | Massachusetts |
| 33 | Abbie F. Hodge | 78 | Mother-in-law | — | Massachusetts |
| 34 | Oscar Nelson THIS PERSON | 31 | Head | Const. Engineer | Massachusetts |
| 35 | Ruth B. Nelson | 29 | Wife-H | — | Massachusetts |
| 36 | Barbara Nelson | 4 | Daughter | — | Massachusetts |
| 37 | Joan Nelson | 2 | Daughter | — | Massachusetts |
| 38 | Martin C. B. Helrich | 50 | Head | Mechanic | Sweden |
| 39 | Helga Helrich | 49 | Wife-H | — | Sweden |
| 40 | Erika Helrich | 23 | Daughter | Clerk | Massachusetts |
| 41 | Walter H. Mansell | 36 | Head | Electrician | Massachusetts |
| 42 | Ruth H. Mansell | 37 | Wife-H | — | New Hampshire |
| 43 | Donald J. Mansell | 14 | Son | — | Massachusetts |
| 44 | Paul E. Mansell | 11 | Son | — | Massachusetts |
| 45 | Robert G. Dennison | 33 | Head | Repairer | Massachusetts |
| 46 | Elizabeth A. Dennison | 26 | Wife-H | — | Massachusetts |
| 47 | Robert A. Jr. Dennison | 1 | Son | — | Massachusetts |
| 48 | Raymond Rust | 30 | Head | Chemist | Tennessee |
| 49 | Elsie D. Rust | 26 | Wife-H | — | Massachusetts |
| 50 | Jerome D. Rust | 2 | Son | — | Massachusetts |
Pedigree Summary
Oscar
Gen 1 · 5 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)