MW
Mary Welsh — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Welsh across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1880), then head of a 3-person household.
Age 60
b. ~1880
Female
Spouse
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Welsh |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Boston City |
| Est. Birth Year | ~1880 |
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 |
|---|---|---|---|---|
| Mary Welsh | Spouse | — | 60 | ~1880 |
| Patrick Welsh | Head | — | 61 | ~1879 |
| Dudley Welsh | Son | — | 29 | ~1911 |
Census Appearances
1930
Suffolk, Massachusetts
Spouse, age 52
Suffolk, Massachusetts · implied b. ~1878 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Walsh |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 31 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Suffolk-County, Massachusetts
Spouse, age 60
Suffolk-County, Massachusetts · implied b. ~1880 — 3 household members
| Surname | Welsh |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Welsh across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Welsh
Spouse · 1940 · age 60 · b. ~1880 · 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 — 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-t0627-01674-00709)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eddy Jewell | 80 | Father | — | Massachusetts |
| 2 | Patrick J. Welsh | 61 | Head | Cement Mason | Ireland |
| 3 | Mary Welsh THIS PERSON | 60 | Wife | — | Maryland |
| 4 | Dudley Welsh | 29 | Son | Teacher | Maryland |
| 5 | Martin Armstrong | 39 | Head | Watchman | New York |
| 6 | Nora Armstrong | 42 | Wife | Dressmaker | Ireland |
| 7 | Walter J. Morse | 36 | Head | Machinist | Massachusetts |
| 8 | Carmella Morse | 31 | Wife | — | Massachusetts |
| 9 | Edward Mchugh | 39 | Head | Painter | New York |
| 10 | Elizabeth Mchugh | 36 | Wife | — | Maine |
| 11 | Marion Mchugh | 12 | Daughter | — | Massachusetts |
| 12 | Evelyn Mchugh | 10 | Daughter | — | Massachusetts |
| 13 | Helen Mchugh | 7 | Daughter | — | Massachusetts |
| 14 | Edward Jr. Mchugh | 4 | Son | — | Massachusetts |
| 15 | George Spicer | 40 | Head | Painter | Massachusetts |
| 16 | Mildred Spicer | 30 | Wife | — | Massachusetts |
| 17 | Dorothy Spicer | 13 | Daughter | — | Massachusetts |
| 18 | Henry Millerman | 45 | Head | Machinist | New York |
| 19 | Mary Millerman | 45 | Wife | — | Massachusetts |
| 20 | Henry Jr. Millerman | 15 | Son | — | Massachusetts |
| 21 | Beatrice Millerman | 13 | Daughter | — | Massachusetts |
| 22 | Marion Millerman | 8 | Daughter | — | Massachusetts |
| 23 | Joseph J. O'Donoghue | 52 | Head | Bus Driver | Maryland |
| 24 | Annie O'Donoghue | 44 | Wife | — | Massachusetts |
| 25 | Mary V. O'Donoghue | 20 | Daughter | Stenographer | Massachusetts |
| 26 | Elizabeth C. O'Donoghue | 16 | Daughter | Clerk | Massachusetts |
| 27 | Margaret R. O'Donoghue | 15 | Daughter | — | Massachusetts |
| 28 | Lillian Day | 26 | Head | Silver Polisher | England |
| 29 | Hazel M. Day | 3 | Daughter | — | Massachusetts |
| 30 | Charles Kelley | 25 | Head | Salesman | Massachusetts |
| 31 | Anna Kelley | 29 | Wife | — | Ireland |
| 32 | Patricia Kelley | 2 | Daughter | — | Massachusetts |
| 33 | Dennis Mclaughlin | 57 | Head | Laborer | Ireland |
| 34 | Margaret Mclaughlin | 57 | Wife | — | Ireland |
| 35 | Helen F. Mclaughlin | 13 | Daughter | — | Massachusetts |
| 36 | James J. Mclaughlin | 11 | Son | — | Massachusetts |
| 37 | John Mclaughlin | 7 | Son | — | Massachusetts |
| 38 | John Agnew | 50 | Boarder | — | Ireland |
| 39 | Joseph F. Doherty | 47 | Boarder | Laborer | Massachusetts |
| 40 | Annie Mccullough | 70 | Boarder | — | Ireland |
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)