WW
William Welch — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this William Welch across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Michael & Ethel — first a son (b.~1916), then head of a 5-person household.
Age 24
b. ~1916
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Welch |
| Given Name | William L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Supply Clerk |
| Industry | Public Utility Light Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Supply Clerk |
| Township / Ward | Boston City |
| Est. Birth Year | ~1916 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Michael Welch | Head | — | 65 | ~1875 |
| Julia Moran | Other | — | 60 | ~1880 |
| William Welch | Son | — | 24 | ~1916 |
| Joseph Welch | Son | — | 29 | ~1911 |
| Ethel Welch | Spouse | — | 62 | ~1878 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 3
Suffolk, Massachusetts · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welch |
| Given Name | William L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Son, age 14
Suffolk, Massachusetts · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welch |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 24
Suffolk-County, Massachusetts · implied b. ~1916 — 5 household members
| Surname | Welch |
| Given Name | William L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Supply Clerk |
| Industry | Public Utility Light Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| 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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Michael Welch (~0.92 confidence) and mother Ethel Welch (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Michael Welch
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Ethel Welch
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Welch
Son · 1940 · age 24 · b. ~1916 · Massachusetts
★ You are viewing this record
Sibling
Joseph Welch
Sibling · 1940 · age 29
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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01677-00113)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Helen R. Grusack | 28 | Daughter | Private Secretary | Massachusetts |
| 42 | Herbert E. Shulty | 48 | Head | Police Officer | Iowa |
| 43 | Ruth D. Shulty | 45 | Wife | — | Massachusetts |
| 44 | Herbert F. Shulty | 21 | Son | — | Massachusetts |
| 45 | Walter E. Shulty | 19 | Son | — | Massachusetts |
| 46 | Virginia Shulty | 15 | Daughter | — | Massachusetts |
| 47 | Marion Shulty | 10 | Daughter | — | Massachusetts |
| 48 | Allwyn Shulty | 7 | Daughter | — | Massachusetts |
| 49 | George Nolan | 19 | Nephew | Laborer | Massachusetts |
| 50 | Michael J. Welch | 65 | Head | — | Massachusetts |
| 51 | Ethel M. Welch | 62 | Wife | — | Massachusetts |
| 52 | Joseph M. Welch | 29 | Son | Cable Man | Massachusetts |
| 53 | William L. Welch THIS PERSON | 24 | Son | Supply Clerk | Massachusetts |
| 54 | Julia Moran | 60 | Sister | Home Maid | Massachusetts |
| 55 | Everett H. Jordan | 78 | Head | Piano Tuner | Canada-English |
| 56 | Katherine V. Jordan | 76 | Wife | — | Canada-English |
| 57 | Ethel M. Keating | 44 | Daughter | — | Massachusetts |
| 58 | William H. Keating | 42 | Son-in-law | Tower Leverman Director | Massachusetts |
| 59 | William H. Jr. Keating | 21 | Grandson | New Worker | Massachusetts |
| 60 | Ellen J. Welch | 59 | Head | New Worker | Massachusetts |
| 61 | Mary J. Welch | 35 | Daughter | Stenographer | Massachusetts |
| 62 | Patrick J. O'Neill | 63 | Head | — | Massachusetts |
| 63 | Mary A. O'Neill | 55 | Wife | — | Massachusetts |
| 64 | — | None | — | — | — |
| 65 | Richard F. Mulloney | 44 | Head | Draftsman | Massachusetts |
| 66 | Anna Mulloney | 43 | Wife | — | Massachusetts |
| 67 | Donald F. Mulloney | 19 | Son | — | Massachusetts |
| 68 | Colette Mulloney | 11 | Daughter | — | Massachusetts |
| 69 | Richard Mulloney | 7 | Son | — | Massachusetts |
| 70 | Mary Sullivan | 76 | Mother-in-law | — | Massachusetts |
| 71 | Christopher Zyleas | 58 | Head | Fruit Dealer | Greece |
| 72 | Helen Zyleas | 50 | Wife | — | Greece |
| 73 | Caliope Zyleas | 34 | Daughter | Bookkeeper | Massachusetts |
| 74 | Minnie Zyleas | 24 | Daughter | Senior Typist | Massachusetts |
| 75 | Lewis A. Baibers | 62 | Head | Plumber'S Helper | Massachusetts |
| 76 | Sophie M. Baibers | 59 | Sister | Selling Clerk | Massachusetts |
| 77 | Holmer Kessling | 57 | Head | Architect | Massachusetts |
| 78 | Elizabeth S. Kessling | 56 | Wife | — | Massachusetts |
| 79 | John J. Macritchie | 49 | Head | Private Chauffeur | Canada-English |
| 80 | Agnes M. Macritchie | 45 | Wife | — | Canada-English |
Pedigree Summary
William + 1 sibling
Gen 1 · 2 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)