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Grace Nelson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Grace Nelson across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 7-person household.
Age 17
b. ~1923
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Nelson |
| Given Name | Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1923 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Grace | Age | Birth yr |
|---|---|---|---|---|
| Grace Nelson | Daughter | — | 17 | ~1923 |
| Martin Nelson | Head | — | 42 | ~1898 |
| Robert Nelson | Son | — | 11 | ~1929 |
| James Nelson | Son | — | 19 | ~1921 |
| Elizabeth Nelson | Daughter | — | 1 | ~1939 |
| Martha Nelson | Spouse | — | 36 | ~1904 |
| William Nelson | Son | — | 16 | ~1924 |
Census Appearances
1930
Middlesex, Massachusetts
Daughter, age 7
Middlesex, Massachusetts · implied b. ~1923 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Grace A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Maine |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 17
Middlesex-County, Massachusetts · implied b. ~1923 — 7 household members
| Surname | Nelson |
| Given Name | Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Highest Grade | Hs 1 |
| 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 Grace Nelson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Grace Nelson
Daughter · 1940 · age 17 · b. ~1923 · Massachusetts
★ You are viewing this record
Sibling
Robert Nelson
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Nelson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Nelson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Nelson
Sibling · 1940 · age 1
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 — 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-t0627-01702-00660)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Maria Smith | 11 | Daughter | — | Massachusetts |
| 2 | Bernard Smith | 10 | Son | — | Massachusetts |
| 3 | Theresa Smith | 8 | Daughter | — | Massachusetts |
| 4 | Barbara Smith | 6 | Daughter | — | Massachusetts |
| 5 | George Smith | 3 | Son | — | Massachusetts |
| 6 | Wallace Tenbrink | 48 | Head | Laborer | England |
| 7 | Lillian Tenbrink | 47 | Wife | — | England |
| 8 | Wallace Jr. Tenbrink | 24 | Son | Laborer | Massachusetts |
| 9 | Stanley Tenbrink | 17 | Son | — | Massachusetts |
| 10 | Lillian Tenbrink | 15 | Daughter | — | Massachusetts |
| 11 | William Tenbrink | 12 | Son | — | Massachusetts |
| 12 | Lawrence Tenbrink | 9 | Son | — | Massachusetts |
| 13 | Thomas F. Hayes | 42 | Head | Baker | Massachusetts |
| 14 | Alice Hayes | 37 | Wife | — | Massachusetts |
| 15 | Helen E. Hayes | 16 | Daughter | — | Massachusetts |
| 16 | Thomas Hayes | 13 | Son | — | Massachusetts |
| 17 | Lawrence Hayes | 9 | Son | — | Massachusetts |
| 18 | Margaret Hayes | 7 | Daughter | — | Massachusetts |
| 19 | Margaret Calil | 76 | Mother in law | — | Eire |
| 20 | Isabell Calil | 47 | Sister in law | Worker | Massachusetts |
| 21 | Martin Romandini | 56 | Head | Repairman | Eire |
| 22 | Mary Romandini | 21 | Daughter | — | Massachusetts |
| 23 | Martin Jr. Romandini | 18 | Son | Laborer | Massachusetts |
| 24 | Donald Romandini | 16 | Son | — | Massachusetts |
| 25 | Mary Cabral | 62 | Head | — | Portugal |
| 26 | Frank Cabral | 37 | Son | Laborer | Portugal |
| 27 | Joseph Cabral | 35 | Son | Laborer | Portugal |
| 28 | Martin Nelson | 42 | Head | Carpenter | Maine |
| 29 | Martha Nelson | 36 | Wife | — | Massachusetts |
| 30 | James Nelson | 19 | Son | Laborer | Maine |
| 31 | Grace Nelson THIS PERSON | 17 | Daughter | — | Massachusetts |
| 32 | William Nelson | 16 | Son | — | Maine |
| 33 | Robert Nelson | 11 | Son | — | Massachusetts |
| 34 | Elizabeth Nelson | 1 | Daughter | — | Massachusetts |
| 35 | Nellie Sullivan | 42 | Head | Hairdresser | Maine |
| 36 | Mary Sullivan | 15 | Daughter | — | Massachusetts |
| 37 | Barbara Sullivan | 12 | Daughter | — | Massachusetts |
| 38 | Martin Queenan | 48 | Head | Painter | Eire |
| 39 | Winifred Queenan | 44 | Wife | — | Eire |
| 40 | Mary Queenan | 23 | Daughter | Tester | Massachusetts |
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)