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William Welch — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this William Welch across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1865), then head of a 3-person household.
Age 75
b. ~1865
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Welch |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 75 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Architect |
| Industry | Planning Survey Project |
| Class of Worker | PW |
| Income (1939) | 1100 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Architect |
| Township / Ward | Medford City |
| Est. Birth Year | ~1865 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Evelyn Wilson | Daughter | — | 54 | ~1886 |
| William Welch | Head | — | 75 | ~1865 |
| Sarah Welch | Spouse | — | 73 | ~1867 |
Census Appearances
1900
Middlesex, Massachusetts
Head, age 39
Middlesex, Massachusetts · implied b. ~1861 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welch |
| Given Name | William H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Birth Month | July |
| Birth Year | 1861 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Day Labor |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1910
Middlesex, Massachusetts
Head, age 48
Middlesex, Massachusetts · implied b. ~1862 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welch |
| Given Name | William F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Years Married | 19 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Milk Dealer |
| Industry | On Own Acct |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Middlesex, Massachusetts
Head, age 57
Middlesex, Massachusetts · implied b. ~1863 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welch |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Industry | Street |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Head, age 67
Middlesex, Massachusetts · implied b. ~1863 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welch |
| Given Name | William W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 29 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Machinist |
| Industry | Erecting |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 35. |
| Radio Set | R |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 75
Middlesex-County, Massachusetts · implied b. ~1865 — 3 household members
| Surname | Welch |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 75 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Occupation | Architect |
| Industry | Planning Survey Project |
| Class of Worker | PW |
| Income (1939) | 1100 |
| Highest Grade | H 4 |
| 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 William Welch across 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Welch
Head · 1940 · age 75 · b. ~1865 · 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 — 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-t0627-01612-00110)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Campbell | 15 | Son | — | Massachusetts |
| 2 | Frank D. Tucker | 43 | Head | Rope Maker | Vermont |
| 3 | Florence J. Tucker | 36 | Wife | — | Massachusetts |
| 4 | Enid J. Tucker | 14 | Daughter | — | Massachusetts |
| 5 | Gaetano Vozio | 40 | Head | Repacker | Italy |
| 6 | Marion Vozio | 33 | Wife | — | Italy |
| 7 | Phyllis Vozio | 17 | Daughter | — | Massachusetts |
| 8 | Eleanor Vozio | 9 | Daughter | — | Massachusetts |
| 9 | Margaret Vozio | 11 | Daughter | — | Massachusetts |
| 10 | Salvatore Vozio | 13 | Son | — | Massachusetts |
| 11 | Hiram J. Nevins | 58 | Head | Operator | Massachusetts |
| 12 | Agnes V. Nevins | 51 | Wife | — | Sweden |
| 13 | Joseph D. Nevins | 30 | Son | Workman | Massachusetts |
| 14 | Donald Ab Nevins | 19 | Son | Laborer C.C.C. | Massachusetts |
| 15 | Evelyn Nevins | 16 | Daughter | — | Massachusetts |
| 16 | Russell H. Stone | 22 | Head | Printer | Massachusetts |
| 17 | Veronica Stone | 25 | Wife | — | Massachusetts |
| 18 | Russell H. Jr. Stone | 2 | Son | — | Massachusetts |
| 19 | Arthur Stone | 1 | Son | — | Massachusetts |
| 20 | Arthur Mcbay | 46 | Head | Time Keeper | Massachusetts |
| 21 | Virginia Mcbay | 46 | Wife | — | Italy |
| 22 | Arthur J. Mcbay | 21 | Son | Drug Clerk | Massachusetts |
| 23 | Stephen Allen | 26 | Head | Ice + Oil | Massachusetts |
| 24 | Mildred Allen | 27 | Wife | — | Canada-Eng |
| 25 | Joan Allen | 2 | Daughter | 0 | Massachusetts |
| 26 | Sally Allen | 0 | Daughter | — | Massachusetts |
| 27 | Andrew Stoddard | 60 | Head | Carpenter | Maine |
| 28 | Ida Stoddard | 47 | Wife | — | Nova Scotia |
| 29 | Louis Robbins | 29 | Head | Laundry Helper | Maine |
| 30 | Beatrice Robbins | 26 | Wife | — | Nova Scotia |
| 31 | Fred N. Hadley | 63 | Head | Tool Keeper | Maine |
| 32 | Sadie Hadley | 60 | Wife | — | Massachusetts |
| 33 | William Welch THIS PERSON | 75 | Head | Architect | Massachusetts |
| 34 | Sarah Catherine Welch | 73 | Wife | — | Massachusetts |
| 35 | Evelyn Wilson | 54 | Daughter | Clerk | Massachusetts |
| 36 | Norman S. Peterson | 40 | Head | Truck Driver | Massachusetts |
| 37 | Maude Peterson | 40 | Wife | — | Massachusetts |
| 38 | Florence Peterson | 9 | Daughter | — | Massachusetts |
| 39 | Frank R. Peterson | 8 | Son | — | Massachusetts |
| 40 | Robert G. Downes | 33 | Head | Head Shipper | 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)