MW
Mary Welsh — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Rockingham-County, New Hampshire
Our Model Tree links this Mary Welsh across the 1930 and 1940 US Censuses in Rockingham-County, New Hampshire (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 10-person household.
Age 16
b. ~1924
Female
Daughter
Born: New Hampshire
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Rockingham-County, New Hampshire |
| Surname | Welsh |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Portsmouth city |
| 1935 Residence (County) | Rockingham |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 4-1 |
| 1935 Residence | Same place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
| Township / Ward | Portsmouth City |
| Est. Birth Year | ~1924 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Thomas Welsh | Head | — | 54 | ~1886 |
| Thomas Welsh | Son | — | 18 | ~1922 |
| Phillip Welsh | Son | — | 12 | ~1928 |
| Susan Welsh | Spouse | — | 54 | ~1886 |
| Cristofer Brennen | Other | — | 40 | ~1900 |
| Mary Welsh | Daughter | — | 16 | ~1924 |
| Richard Welsh | Other | — | 60 | ~1880 |
| Helen Welsh | Daughter | — | 13 | ~1927 |
| John Welsh | Son | — | 9 | ~1931 |
| Richard Welsh | Son | — | 19 | ~1921 |
Census Appearances
1930
Rockingham, New …
Daughter, age 6
Rockingham, New Hampshire · implied b. ~1924 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Walsh |
| Given Name | Mary G. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Northern Ireland |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1940
Rockingham-County, New …
Daughter, age 16
Rockingham-County, New Hampshire · implied b. ~1924 — 10 household members
| Surname | Welsh |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Portsmouth city |
| 1935 Residence (County) | Rockingham |
| Income (1939) | 0 |
| Highest Grade | Hs 4-1 |
| 1935 Residence | Same place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
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
Daughter · 1940 · age 16 · b. ~1924 · New Hampshire
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Sibling
Richard Welsh
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Welsh
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Welsh
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Welsh
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Phillip Welsh
Sibling · 1940 · age 12
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 — Rockingham-County, New Hampshire
Open full size
1940 US Federal Census — Rockingham-County, New Hampshire
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02296-00415)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph S. Beaudry | 36 | Head | Machinist | Massachusetts |
| 2 | Regina J. Beaudry | 31 | Wife | — | Canada-French |
| 3 | Roger G. Beaudry | 3 | Son | — | Massachusetts |
| 4 | Theresa L. Beaudry | 1 | Daughter | — | New Hampshire |
| 5 | Adjutore Champoux | 52 | Head | Barber | Canada-French |
| 6 | Clifton E. Willette | 54 | Head | General Helper | New Hampshire |
| 7 | Margaret Willette | 49 | Wife | — | New Hampshire |
| 8 | Peter P. Sr. Bukelis | 53 | Head | Machine Operator | Lithuania |
| 9 | Grace Bukelis | 40 | Wife | — | Lithuania |
| 10 | Peter P. Jr. Bukelis | 23 | Son | Laborer | New Hampshire |
| 11 | Ellen Bukelis | 17 | Daughter | — | New Hampshire |
| 12 | Thomas R. Welsh | 54 | Head | Boiler Maker | Eire |
| 13 | Susan A. Welsh | 54 | Wife | — | Northern Ireland |
| 14 | Richard A. Welsh | 19 | Son | Clerk | New Hampshire |
| 15 | Thomas J. Welsh | 18 | Son | Attendant | New Hampshire |
| 16 | Mary C. Welsh THIS PERSON | 16 | Daughter | — | New Hampshire |
| 17 | Helen C. Welsh | 13 | Daughter | — | New Hampshire |
| 18 | Phillip B. Welsh | 12 | Son | — | New Hampshire |
| 19 | John G. Welsh | 9 | Son | — | New Hampshire |
| 20 | Richard J. Welsh | 60 | Brother | Laborer | Eire |
| 21 | Cristofer Brennen | 40 | Lodger | Laborer | New Hampshire |
| 22 | John Chahofsky | 53 | Head | Driller | Lithuania |
| 23 | Bertha Chahofsky | 48 | Wife | Stitcher | Russia |
| 24 | Jane P. Ab. Chahofsky | 20 | Daughter | — | New Hampshire |
| 25 | John G. Kruk | 29 | Head | Manager | Massachusetts |
| 26 | Mary T. Kruk | 27 | Wife | Waitress | Massachusetts |
| 27 | Helen B. Kruk | 1 | Daughter | — | New Hampshire |
| 28 | James A. Whitmore | 38 | Head | Sheet Metal Worker | Maine |
| 29 | Eunice M. Whitmore | 38 | Wife | — | Maine |
| 30 | John D. Whitmore | 15 | Son | — | Maine |
| 31 | Dorothy A. Whitmore | 13 | Daughter | — | Maine |
| 32 | Thomas P. Pendergast | 38 | Head | Chipper & Caulker | New Hampshire |
| 33 | Madeline F. Pendergast | 32 | Wife | — | Maine |
| 34 | Kathryn E. Pendergast | 13 | Daughter | — | New Hampshire |
| 35 | Thomas E. Pendergast | 11 | Son | — | New Hampshire |
| 36 | Charles De Nicholas | 62 | Head | Barber | Italy |
| 37 | Eva De Nicholas | 51 | Wife | Nurse | Massachusetts |
| 38 | Clifford Pooler | 37 | Head | Moulder | Maine |
| 39 | Lillian Pooler | 33 | Wife | Waitress | Maine |
| 40 | Robert Pooler | 2 | Son | — | New Hampshire |
Related Census Records
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)