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Margaret Welch — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Margaret Welch across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 8-person household.
Age 17
b. ~1923
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Welch |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Industry | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lowell City |
| Est. Birth Year | ~1923 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Leo Welch | Son | — | 26 | ~1914 |
| Joan Welch | Daughter | — | 8 | ~1932 |
| Paul Welch | Son | — | 24 | ~1916 |
| William Welch | Head | — | 58 | ~1882 |
| Margaret Welch | Daughter | — | 17 | ~1923 |
| Margaret Welch | Spouse | — | 56 | ~1884 |
| Catherine Welch | Daughter | — | 14 | ~1926 |
| Arthur Welch | Son | — | 13 | ~1927 |
Census Appearances
1930
Middlesex, Massachusetts
Daughter, age 8
Middlesex, Massachusetts · implied b. ~1922 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welch |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| 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
Middlesex-County, Massachusetts
Daughter, age 17
Middlesex-County, Massachusetts · implied b. ~1923 — 8 household members
| Surname | Welch |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell City |
| 1935 Residence (County) | Middlesex |
| Industry | 0 |
| 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 Margaret Welch across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Margaret Welch
Daughter · 1940 · age 17 · b. ~1923 · Massachusetts
★ You are viewing this record
Sibling
Catherine Welch
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Welch
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joan Welch
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arthur Welch
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leo Welch
Sibling · 1940 · age 26
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 — 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-t0627-01691-00548)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Francis Delli | 15 | Son | — | Massachusetts |
| 2 | Louis Delli | 11 | Son | — | Massachusetts |
| 3 | Catherine Kane | 54 | Head | — | Eire |
| 4 | Roger Kane | 33 | Nephew | Road Man | Massachusetts |
| 5 | Daniel Kane | 31 | Nephew | Salesman | Massachusetts |
| 6 | Thomas Welch | 37 | Nephew | Labourer | Massachusetts |
| 7 | Elizabeth Welch | 52 | Sister | — | Massachusetts |
| 8 | William Bradley | 60 | Lodger | — | Massachusetts |
| 9 | William Welch | 58 | Head | Janitor | Massachusetts |
| 10 | Margaret Welch | 56 | Wife | — | New York |
| 11 | Leo Welch | 26 | Son | Bleacher | Massachusetts |
| 12 | Paul Welch | 24 | Son | Dyer | Massachusetts |
| 13 | Margaret Welch THIS PERSON | 17 | Daughter | — | Massachusetts |
| 14 | Catherine Welch | 14 | Daughter | — | Massachusetts |
| 15 | Arthur Welch | 13 | Son | — | Massachusetts |
| 16 | Joan Welch | 8 | Daughter | — | Massachusetts |
| 17 | James Jolley | 52 | Head | Carpenter | New Hampshire |
| 18 | Sarah Jolley | 47 | Wife | Cap Spinner | Massachusetts |
| 19 | Thomas Jolley | 19 | Son | Truck Driver | Massachusetts |
| 20 | Arthur Higgins | 52 | Head | Fireman | Massachusetts |
| 21 | Margaret Higgins | 51 | Sister | — | Massachusetts |
| 22 | John Higgins | 52 | Head | Tanner | Massachusetts |
| 23 | Mary Higgins | 47 | Wife | — | Massachusetts |
| 24 | William Dacey | 59 | Head | — | Massachusetts |
| 25 | Anna Dacey | 58 | Wife | — | Massachusetts |
| 26 | Anna Dacey | 26 | Daughter | Sales Girl | Massachusetts |
| 27 | Edward Farrell | 42 | Head | Fireman | Massachusetts |
| 28 | Jane Farrell | 40 | Wife | — | Massachusetts |
| 29 | James Farrell | 15 | Son | — | Massachusetts |
| 30 | Dennis Heslin | 40 | Head | Laborer | Massachusetts |
| 31 | Margaret Heslin | 38 | Wife | — | Massachusetts |
| 32 | Manuel Loureiro | 42 | Head | Air Conditioning | Massachusetts |
| 33 | Mary Loureiro | 41 | Wife | Smasher | Portugal |
| 34 | Frank Loureiro | 21 | Son | Shearer | Massachusetts |
| 35 | Mary Loureiro | 20 | Daughter | — | Massachusetts |
| 36 | Joseph Loureiro | 17 | Son | — | Massachusetts |
| 37 | Martin Flynn | 62 | Head | Laborer | Eire |
| 38 | Bridget Flynn | 54 | Wife | — | Eire |
| 39 | Margaret Flynn | 19 | Daughter | — | Massachusetts |
| 40 | Henry Flynn | 15 | Son | — | Massachusetts |
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)