MN
Mary Nelson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Worcester-County, Massachusetts
Our Model Tree links this Mary Nelson across the 1920, 1930 and 1940 US Censuses in Worcester-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1889), then head of a 3-person household.
Age 51
b. ~1889
Female
Spouse
Born: Finland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Worcester-County, Massachusetts |
| Surname | Nelson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | Mass |
| Naturalization Status | Alien |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Mass |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
| Township / Ward | Worcester City |
| Est. Birth Year | ~1889 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mildred Nelson | Daughter | — | 25 | ~1915 |
| Axel Nelson | Head | — | 60 | ~1880 |
| Mary Nelson | Spouse | — | 51 | ~1889 |
Census Appearances
1920
Worcester, Massachusetts
Spouse, age 30
Worcester, Massachusetts · implied b. ~1890 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nilson |
| Given Name | Mary W. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Finland |
| Year of Immigration | 1907 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth Country | Finland |
| Year of Naturalization | 1906 |
| Birthplace (normalized) | finland |
1930
Worcester, Massachusetts
Spouse, age 41
Worcester, Massachusetts · implied b. ~1889 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nilson |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Finland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1907 |
| Age at First Marriage | 24 |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | Finnish |
| Veteran | No |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1940
Worcester-County, Massachusetts
Spouse, age 51
Worcester-County, Massachusetts · implied b. ~1889 — 3 household members
| Surname | Nelson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | Mass |
| Naturalization Status | Alien |
| Highest Grade | No 5 |
| 1935 Residence | Mass |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
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 Mary Nelson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Nelson
Spouse · 1940 · age 51 · b. ~1889 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Worcester-County, Massachusetts
Open full size
1940 US Federal Census — Worcester-County, Massachusetts
Page Contents
31 people indexed on this census page (nara:1940:m-t0627-01713-00448)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Raymond Lyyddinen | 6 | Son | — | Mass |
| 2 | Peter Martin | 57 | Head | Dye Maker | Canada |
| 3 | Mabel Martin | 46 | Wife | Saleslady | Vermont |
| 4 | Rita Martin | 18 | Daughter | — | Mass |
| 5 | Beatrice Martin | 15 | Daughter | — | Mass |
| 6 | Shirley Martin | 12 | Daughter | — | Mass |
| 7 | Peter Martin | 10 | Son | — | Mass |
| 8 | Leonard Palmer | 35 | Head | Trucking | Mass |
| 9 | Elizabeth Palmer | 32 | Wife | — | Ill. |
| 10 | Paul Palmer | 14 | Son | — | Mass |
| 11 | Marjorie Palmer | 12 | Daughter | — | Mass |
| 12 | Leonard Palmer | 9 | Son | — | Mass |
| 13 | James Nally | 24 | Boarder | — | Mass |
| 14 | Michael Kilcoyne | 48 | Head | Laborer | Irish F. S. |
| 15 | Margaret Kilcoyne | 47 | Wife | — | Irish F. S. |
| 16 | John Kilcoyne | 17 | Son | — | Mass |
| 17 | Thomas R. Kilcoyne | 16 | Son | — | Mass |
| 18 | Mary Kilcoyne | 13 | Daughter | — | Mass |
| 19 | Margaret Kilcoyne | 11 | Daughter | — | Mass |
| 20 | Edward Mara | 35 | Head | Driver | R. I. |
| 21 | Mary Mara | 31 | Wife | — | Mass |
| 22 | Mary Mara | 10 | Daughter | — | Mass |
| 23 | William Mara | 7 | Son | — | Mass |
| 24 | Michael Mara | 4 | Son | — | Mass |
| 25 | Thomas Mara | 2 | Son | — | Mass |
| 26 | John Bineskis | 55 | Head | Wire Drawer | Lithuania |
| 27 | Veronica Bineskis | 49 | Wife | — | Lithuania |
| 28 | Alberta Bineskis | 18 | Daughter | Clerk | Mass |
| 29 | Axel Nelson | 60 | Head | Wire Worker | Sweden |
| 30 | Mary Nelson THIS PERSON | 51 | Wife | — | Finland |
| 31 | Mildred Nelson | 25 | Daughter | — | Mass |
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)