MW
Mary Welsh — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Carroll-County, Maryland
Our Model Tree links this Mary Welsh across the 1930 and 1940 US Censuses in Carroll-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 4-person household.
Age 15
b. ~1925
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Carroll-County, Maryland |
| Surname | Welsh |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Howard |
| Additional Details | |
| Class of Worker | S |
| Highest Grade | Hs 1 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Mt Airy |
| Est. Birth Year | ~1925 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| William Welsh | Head | — | 61 | ~1879 |
| Elsie Welsh | Spouse | — | 57 | ~1883 |
| Lawrence Welsh | Son | — | 21 | ~1919 |
| Mary Welsh | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Howard, Maryland
Daughter, age 5
Howard, Maryland · implied b. ~1925 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welsh |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Carroll-County, Maryland
Daughter, age 15
Carroll-County, Maryland · implied b. ~1925 — 4 household members
| Surname | Welsh |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Howard |
| Class of Worker | S |
| Highest Grade | Hs 1 |
| 1935 Residence | Maryland |
| 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
Daughter · 1940 · age 15 · b. ~1925 · Maryland
★ You are viewing this record
Sibling
Lawrence Welsh
Sibling · 1940 · age 21
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 — Carroll-County, Maryland
Open full size
1940 US Federal Census — Carroll-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01544-01029)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Omer Bowers | 30 | Head | Electrician | Maryland |
| 42 | Edna Bowers | 25 | Wife | — | Maryland |
| 43 | Omer Jr. Bowers | 7 | Son | — | Maryland |
| 44 | Ernest Smith | 69 | Head | Caretaker Of Cemetery | Maryland |
| 45 | Gertrude Smith | 63 | Wife | — | Maryland |
| 46 | Israel Phillips | 77 | Head | Farmer | Maryland |
| 47 | Martha Phillips | 78 | Wife | — | Maryland |
| 48 | J. Arthur Stem | 56 | Head | Boilermaker | Maryland |
| 49 | Florence Stem | 52 | Wife | — | Maryland |
| 50 | Oliver Krill | 36 | Nephew | Farm Laborer | Maryland |
| 51 | Paul Rouble | 6 | Nephew | — | Maryland |
| 52 | Angel Scant | 6 | Niece | — | Maryland |
| 53 | Joseph Linthicum | 73 | Head | Farmer | Maryland |
| 54 | Sherman Kleine | 50 | Son-in-law | Farmer | Maryland |
| 55 | Rosa Kleine | 40 | Daughter | — | Maryland |
| 56 | Ethel Kleine | 3 | Niece | — | Maryland |
| 57 | William Green | 32 | Head | Farm Labor | Maryland |
| 58 | Barbara Green | 26 | Wife | — | Maryland |
| 59 | Anna May Green | 8 | Daughter | — | Maryland |
| 60 | John Guntz | 79 | Head | — | Maryland |
| 61 | Mary Bennett | 65 | Housekeeper | Housekeeper | Maryland |
| 62 | Columbus Windsor | 45 | Head | Engineer | Ohio |
| 63 | Georgia Windsor | 53 | Wife | — | Maryland |
| 64 | Charles V. King | 62 | Cousin | — | Maryland |
| 65 | James Windsor | 54 | Head | Painter | Maryland |
| 66 | Laura Windsor | 42 | Wife | — | Maryland |
| 67 | James Jr. Windsor | 28 | Son | Electrician | Maryland |
| 68 | Leon Windsor | 25 | Son | Painter | Maryland |
| 69 | Elaine Windsor | 15 | Daughter | — | Maryland |
| 70 | David Scheffer | 75 | Head | — | Pennsylvania |
| 71 | Almida Scheffer | 68 | Wife | — | Maryland |
| 72 | Albert Wiles | 52 | Head | Farmer | Maryland |
| 73 | Blanche Wiles | 48 | Wife | — | Maryland |
| 74 | William Welsh | 61 | Head | Laborer | Maryland |
| 75 | Elsie Welsh | 57 | Wife | — | Maryland |
| 76 | Lawrence Welsh | 21 | Son | Laborer | Maryland |
| 77 | Mary Welsh THIS PERSON | 15 | Daughter | — | Maryland |
| 78 | George Rickett | 52 | Head | Carpenter | Maryland |
| 79 | Maggie Rickett | 49 | Wife | — | Maryland |
| 80 | Margaret Norwood | 73 | Head | — | Maryland |
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)