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Mary Welch — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Welch across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Daniel & Mary — first a daughter (b.~1919), then head of a 6-person household.
Age 21
b. ~1919
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Welch |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Clerk |
| Industry | Telegraph Co. |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Clerk |
| Township / Ward | Boston City |
| Est. Birth Year | ~1919 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Helen Welch | Daughter | — | 18 | ~1922 |
| Mary Welch | Daughter | — | 21 | ~1919 |
| Daniel Welch | Head | — | 53 | ~1887 |
| Arthur Welch | Son | — | 25 | ~1915 |
| Edward Welch | Son | — | 16 | ~1924 |
| Mary Welch | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Suffolk, Massachusetts
Daughter, age 1
Suffolk, Massachusetts · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welch |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Daughter, age 11
Suffolk, Massachusetts · implied b. ~1919 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welch |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| 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
Daughter, age 21
Suffolk-County, Massachusetts · implied b. ~1919 — 6 household members
| Surname | Welch |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Occupation | Clerk |
| Industry | Telegraph Co. |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 0 |
| 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 Mary Welch across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Daniel Welch (~0.92 confidence) and mother Mary Welch (~0.92 confidence) and father Michael Welch (~0.92 confidence) and father James Welch (~0.92 confidence) and mother Mary Welch (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Daniel Welch
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Mary Welch
b. ~1891
Source mother
● Household
· direct · ~0.92
Father
Michael Welch
b. ~1896
Source father
● Household
· direct · ~0.92
Father
James Welch
b. ~1897
Source father
● Household
· direct · ~0.92
Mother
Mary Welch
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Welch
Daughter · 1940 · age 21 · b. ~1919 · Massachusetts
★ You are viewing this record
Sibling
Arthur Welch
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Welch
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Welch
Sibling · 1940 · age 16
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-t0627-01665-00053)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Gertrude Yetman | 19 | Daughter | Saleswoman | Massachusetts |
| 2 | Dorothy Yetman | 17 | Daughter | — | Massachusetts |
| 3 | Josephine Yetman | 14 | Daughter | — | Massachusetts |
| 4 | Joseph F Mealy | 36 | Head | Paper Cutter | Massachusetts |
| 5 | Ida Mealy | 32 | Wife | — | Scotland |
| 6 | Eleanor Mealy | 14 | Daughter | — | Massachusetts |
| 7 | Phyllis Mealy | 8 | Daughter | — | Massachusetts |
| 8 | Joseph Mealy | 1 | Son | — | Massachusetts |
| 9 | Raymond Mickevich | 54 | Head | Cook | Lithuania |
| 10 | Anna Mickevich | 47 | Wife | Charwoman | Lithuania |
| 11 | Alice Mickevich | 20 | Daughter | Machine Operator | Massachusetts |
| 12 | Bronie Mickevich | 18 | Daughter | Machine Operator | Massachusetts |
| 13 | James B Harrington | 46 | Head | Fireman | Massachusetts |
| 14 | Anna J Harrington | 47 | Wife | — | Massachusetts |
| 15 | Anna C Harrington | 15 | Daughter | — | Massachusetts |
| 16 | Joan M Harrington | 13 | Daughter | — | Massachusetts |
| 17 | John Maroon | 35 | Head | Clothing Cutter | Syria |
| 18 | Julia Maroon | 36 | Wife | — | New Jersey |
| 19 | Shirley Maroon | 14 | Daughter | — | Massachusetts |
| 20 | Thomas F Carr | 37 | Head | Meat Cutter | Massachusetts |
| 21 | Ruth A Carr | 37 | Wife | — | Massachusetts |
| 22 | Lorraine Carr | 9 | Daughter | — | Massachusetts |
| 23 | Ruth A Carr | 7 | Daughter | — | Massachusetts |
| 24 | Thomas F Jr Carr | 6 | Son | — | Massachusetts |
| 25 | Paul E Carr | 5 | Son | — | Massachusetts |
| 26 | Daniel J Welch | 53 | Head | Web Pressman | Massachusetts |
| 27 | Mary E Welch | 49 | Wife | — | Eire |
| 28 | Arthur Welch | 25 | Son | Press Clerk | Massachusetts |
| 29 | Mary Welch THIS PERSON | 21 | Daughter | Clerk | Massachusetts |
| 30 | Helen Welch | 18 | Daughter | — | Massachusetts |
| 31 | Edward Welch | 16 | Son | — | Massachusetts |
| 32 | William Harris | 63 | Head | Printer | Vermont |
| 33 | Mildred Harris | 66 | Wife | — | N. Adams |
| 34 | Walter Hanley | 45 | Son | Compositor | Massachusetts |
| 35 | Frank Mirasole | 48 | Head | Butcher | Italy |
| 36 | Laura Mirasole | 36 | Wife | — | Massachusetts |
| 37 | Joseph Mirasole | 23 | Son | Driver | Massachusetts |
| 38 | Peter Mirasole | 21 | Son | Driver | Massachusetts |
| 39 | Guy Mirasole | 19 | Son | New Worker | Massachusetts |
| 40 | Salvatore Mirasole | 16 | Son | — | Massachusetts |
Related Census Records
Pedigree Summary
Mary + 3 siblings
Gen 1 · 5 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)