JD
John Dwyer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Franklin-County, Massachusetts
Our Model Tree links this John Dwyer across the 1930 and 1940 US Censuses in Franklin-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1918), then head of a 11-person household.
Age 22
b. ~1918
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Franklin-County, Massachusetts |
| Surname | Dwyer |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Greenfield |
| 1935 Residence (County) | Franklin |
| Additional Details | |
| Occupation | laborer |
| Industry | Town |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 100 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Laborer |
| Township / Ward | Greenfield |
| Est. Birth Year | ~1918 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Bridget Dwyer | Spouse | — | 54 | ~1886 |
| Mary Dwyer | Daughter | — | 24 | ~1916 |
| Joseph Dwyer | Son | — | 18 | ~1922 |
| Helen Dwyer | Daughter | — | 17 | ~1923 |
| John Dwyer | Son | — | 22 | ~1918 |
| James Dwyer | Head | — | 60 | ~1880 |
| James Dwyer | Son | — | 26 | ~1914 |
| Thomas Dwyer | Son | — | 21 | ~1919 |
| Margaret Rosewarne | Daughter | — | 33 | ~1907 |
| Kenneth Rosewarne | Other | — | 12 | ~1928 |
| Bernard Rosewarne | Other | — | 10 | ~1930 |
Census Appearances
1930
Franklin, Massachusetts
Son, age 12
Franklin, Massachusetts · implied b. ~1918 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dwyer |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Age at First Marriage | 12 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Franklin-County, Massachusetts
Son, age 22
Franklin-County, Massachusetts · implied b. ~1918 — 11 household members
| Surname | Dwyer |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Greenfield |
| 1935 Residence (County) | Franklin |
| Occupation | laborer |
| Industry | Town |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 100 |
| Highest Grade | Hs 2 |
| 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 John Dwyer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Dwyer
Son · 1940 · age 22 · b. ~1918 · Massachusetts
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Sibling
Helen Dwyer
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Dwyer
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Dwyer
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Rosewarne
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Dwyer
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Dwyer
Sibling · 1940 · age 21
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 — Franklin-County, Massachusetts
Open full size
1940 US Federal Census — Franklin-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01591-00478)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Nelson E. Lamb | 32 | Head | Repairman | Massachusetts |
| 2 | Hazel L. Lamb | 29 | Wife | — | Vermont |
| 3 | Robert E. Lamb | 8 | Son | — | Massachusetts |
| 4 | Edward N. Lamb | 4 | Son | — | Massachusetts |
| 5 | James J. Dwyer | 60 | Head | — | Irish Free State |
| 6 | Bridget T. Dwyer | 54 | Wife | — | Irish Free State |
| 7 | James M. Dwyer | 26 | Son | Truck Driver | Massachusetts |
| 8 | Mary A. Dwyer | 24 | Daughter | Shipping Clerk | Massachusetts |
| 9 | John F. Dwyer THIS PERSON | 22 | Son | Laborer | Massachusetts |
| 10 | Thomas F. Dwyer | 21 | Son | Laborer | Massachusetts |
| 11 | Joseph M. Dwyer | 18 | Son | Landscape | Massachusetts |
| 12 | Helen E. Dwyer | 17 | Daughter | — | Massachusetts |
| 13 | Margaret E. Rosewarne | 33 | Daughter | — | Massachusetts |
| 14 | Kenneth A. Rosewarne | 12 | Grandson | — | Massachusetts |
| 15 | Bernard J. Rosewarne | 10 | Grandson | — | Massachusetts |
| 16 | William H. Dyer | 60 | Head | Lineman | Massachusetts |
| 17 | Anna E. Dyer | 55 | Wife | — | Massachusetts |
| 18 | Gordon A. Dyer | 19 | Son | Any Work | Massachusetts |
| 19 | Thomas Lebert | 41 | Head | Adv. Salesman | New York |
| 20 | Mary M. Lebert | 40 | Wife | — | Massachusetts |
| 21 | Margaret M. Lebert | 16 | Daughter | — | Connecticut |
| 22 | Albert H. Lebert | 12 | Son | — | Vermont |
| 23 | Robert G. Lebert | 7 | Son | — | Massachusetts |
| 24 | William L. Duprey | 37 | Head | Mason | Massachusetts |
| 25 | Mabel W. Duprey | 31 | Wife | — | Massachusetts |
| 26 | William L. Jr. Duprey | 14 | Son | — | Massachusetts |
| 27 | Marian B. Duprey | 12 | Daughter | — | Connecticut |
| 28 | Robert Duprey | 8 | Son | — | Massachusetts |
| 29 | Jacob F. Merz | 30 | Head | Moulders Helper | Massachusetts |
| 30 | Dorothy E. Merz | 23 | Wife | — | Massachusetts |
| 31 | Jack L. Merz | 4 | Son | — | Massachusetts |
| 32 | Ralph Woodard | 28 | Head | Clerk | Massachusetts |
| 33 | Ruth B. Woodard | 25 | Wife | — | Vermont |
| 34 | Joyce M. Woodard | 5 | Daughter | — | Massachusetts |
| 35 | Douglass R. Woodard | 3 | Son | — | Massachusetts |
| 36 | Dorothy A. Woodard | 0 | Daughter | — | Massachusetts |
| 37 | Minerva B. Duncan | 47 | Head | — | Maine |
| 38 | Howard A. Duncan | 23 | Son | Machinist | Maine |
| 39 | Ida E. Duncan | 22 | Daughter | — | Maine |
| 40 | Sherman K. Duncan | 15 | Son | — | Maine |
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)