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Carl Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Carl Nelson across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Carl & Carl — first a son (b.~1893), then head of a 3-person household.
Age 47
b. ~1893
Male
Son
Born: Sweden
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Nelson |
| Given Name | Carl R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Single |
| Birthplace | Sweden |
| 1935 Residence (City) | Malden City |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Paint Mixer |
| Industry | Wholesale paint |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1225 |
| Highest Grade | H-2 |
| 1935 Residence | Same house |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Occupation | Paint Mixer |
| Township / Ward | Malden City |
| Est. Birth Year | ~1893 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Carl | Age | Birth yr |
|---|---|---|---|---|
| Carl Nelson | Head | — | 75 | ~1865 |
| Carl Nelson | Son | — | 47 | ~1893 |
| Ida Nelson | Spouse | — | 70 | ~1870 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 26
Middlesex, Massachusetts · implied b. ~1894 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Carl R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Sweden |
| Year of Immigration | 1910 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Piano Polisher |
| Industry | Piano Factory |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Year of Naturalization | 1918 |
| Birthplace (normalized) | sweden |
1930
Middlesex, Massachusetts
Son, age 37
Middlesex, Massachusetts · implied b. ~1893 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Carl R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Sweden |
| Naturalization Status | Naturalized |
| Year of Immigration | 1909 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Polisher |
| Industry | Piano factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Veteran | Yes |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Middlesex-County, Massachusetts
Son, age 47
Middlesex-County, Massachusetts · implied b. ~1893 — 3 household members
| Surname | Nelson |
| Given Name | Carl R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Single |
| Birthplace | Sweden |
| 1935 Residence (City) | Malden City |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Occupation | Paint Mixer |
| Industry | Wholesale paint |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1225 |
| Highest Grade | H-2 |
| 1935 Residence | Same house |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
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 Carl Nelson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Carl Nelson (~0.92 confidence) and father Carl Nelson (~0.92 confidence) and father Carl Nelson (~0.92 confidence) and mother Ida Nelson (~0.92 confidence) and mother Ida Nelson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Carl Nelson
b. ~1865
Source father
● Household
· direct · ~0.92
Father
Carl Nelson
b. ~1865
Source father
● Household
· direct · ~0.92
Father
Carl Nelson
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Ida Nelson
b. ~1870
Source mother
● Household
· direct · ~0.92
Mother
Ida Nelson
b. ~1870
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Carl Nelson
Son · 1940 · age 47 · b. ~1893 · 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-t0627-01609-00526)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Claire M. Hopkins | 37 | Wife | — | Massachusetts |
| 42 | John Jr. Hopkins | 16 | Son | — | Massachusetts |
| 43 | Richard Hopkins | 11 | Son | — | Massachusetts |
| 44 | Walter H. Hopkins | 67 | Father | Salesman | Massachusetts |
| 45 | Caroline L. Hopkins | 67 | Mother | — | Massachusetts |
| 46 | Robert Corey | 5 | Roomer | — | Massachusetts |
| 47 | Elwood Abel | 52 | Head | — | Massachusetts |
| 48 | Josephine L. Abel | 53 | Wife | — | Irish Free State |
| 49 | Elwood Jr. Abel | 30 | Son | Clerk | Massachusetts |
| 50 | Harold Abel | 24 | Son | Salesgirl | Massachusetts |
| 51 | Alice Patriquin | 42 | Sister | Book-Keeper | Massachusetts |
| 52 | Perley Abel | 29 | Brother | Chef | Massachusetts |
| 53 | Elizabeth Quigley | 81 | Mother-in-law | — | Irish Free State |
| 54 | Arthur P. Mullaney | 34 | Head | Waiter | Massachusetts |
| 55 | Edythe Mullaney | 30 | Wife | — | Massachusetts |
| 56 | Arthur P. Jr. Mullaney | 3 | Son | — | Massachusetts |
| 57 | George B. Sutherland | 71 | Head | Clerk | Nova Scotia |
| 58 | Jean Sutherland | 66 | Wife | — | Canada-English |
| 59 | Mary C. Dana | 53 | Housekeeper | House-Keeper | Massachusetts |
| 60 | John Carmody | 50 | Head | Contractor | Nova Scotia |
| 61 | Sarah Carmody | 52 | Sister | — | New York |
| 62 | Mary Carmody | 47 | Sister | District Nurse | New York |
| 63 | Caroline Carmody | 46 | Sister | Telegraph Operator | New York |
| 64 | Arthur Baker | 37 | Head | Oiler | Massachusetts |
| 65 | Sybil Baker | 36 | Wife | — | Massachusetts |
| 66 | Sybil B. Baker | 13 | Daughter | — | Massachusetts |
| 67 | Arthur Jr. Baker | 11 | Son | — | Massachusetts |
| 68 | Charles Davis | 71 | Head | — | Rhode Island |
| 69 | Mary J. Davis | 70 | Wife | — | Massachusetts |
| 70 | Alma Davis | 32 | Daughter | Secretary | Massachusetts |
| 71 | Eleanor Cummings | 67 | Roomer | Contractor | Massachusetts |
| 72 | Carl O. Nelson | 75 | Head | Paint Mixer | Sweden |
| 73 | Ida C. Nelson | 70 | Wife | — | Sweden |
| 74 | Carl R. Nelson THIS PERSON | 47 | Son | Paint Mixer | Sweden |
| 75 | J. Frank Norton | 53 | Head | Clerk | Massachusetts |
| 76 | Gertrude A. Norton | 48 | Wife | — | Massachusetts |
| 77 | Alice T. Hart | 72 | Head | — | Maine |
| 78 | Felice Zampitella | 47 | Head | Heeler | Italy |
| 79 | Carmela Zampitella | 35 | Wife | — | Italy |
| 80 | Stefania Zampitella | 14 | Daughter | — | Massachusetts |
Pedigree Summary
Carl
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 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)