MC
Mary Callahan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hampden-County, Massachusetts
Our Model Tree links this Mary Callahan across the 1920, 1930 and 1940 US Censuses in Hampden-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Timothy & Timothy — first a daughter (b.~1904), then head of a 3-person household.
Age 36
b. ~1904
Female
Daughter
Born: Connecticut
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hampden-County, Massachusetts |
| Surname | Callahan |
| Given Name | Mary A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Connecticut |
| 1935 Residence (City) | Holyoke City |
| 1935 Residence (County) | Hampden |
| Additional Details | |
| Occupation | Operator |
| Industry | Telephone Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 242 |
| Highest Grade | No 9 |
| 1935 Residence | Same place |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
| Occupation | Operator |
| Township / Ward | Holyoke City |
| Est. Birth Year | ~1904 |
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 Callahan | Daughter | — | 36 | ~1904 |
| Timothy Callahan | Head | — | 80 | ~1860 |
| Margaret Callahan | Spouse | — | 70 | ~1870 |
Census Appearances
1920
Hampden, Massachusetts
Daughter, age 17
Hampden, Massachusetts · implied b. ~1903 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Mary Agnes |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Connecticut |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Assister |
| Industry | Envelope shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
1930
Hampden, Massachusetts
Daughter, age 28
Hampden, Massachusetts · implied b. ~1902 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Connecticut |
| Age at First Marriage | 28 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Telephone operator |
| Industry | Telephone exchange |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
1940
Hampden-County, Massachusetts
Daughter, age 36
Hampden-County, Massachusetts · implied b. ~1904 — 3 household members
| Surname | Callahan |
| Given Name | Mary A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Connecticut |
| 1935 Residence (City) | Holyoke City |
| 1935 Residence (County) | Hampden |
| Occupation | Operator |
| Industry | Telephone Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 242 |
| Highest Grade | No 9 |
| 1935 Residence | Same place |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
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 Callahan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Timothy Callahan (~0.92 confidence) and father Timothy Callahan (~0.92 confidence) and father Timothy Callahan (~0.92 confidence) and mother Margaret Callahan (~0.92 confidence) and mother Margaret Callahan (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Timothy Callahan
b. ~1860
Source father
● Household
· direct · ~0.92
Father
Timothy Callahan
b. ~1866
Source father
● Household
· direct · ~0.92
Father
Timothy Callahan
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Margaret Callahan
b. ~1869
Source mother
● Household
· direct · ~0.92
Mother
Margaret Callahan
b. ~1870
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Callahan
Daughter · 1940 · age 36 · b. ~1904 · Massachusetts
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Hampden-County, Massachusetts
Open full size
1940 US Federal Census — Hampden-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01596-00353)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Evelyn M Sefton | 34 | Head | Housekeeper | Massachusetts |
| 42 | Ronald Sefton | 4 | Son | — | Massachusetts |
| 43 | Isaac Shaw | 51 | Head | Laborer | England |
| 44 | Ellen (X) Shaw | 48 | Wife | Housekeeper | England |
| 45 | Leslie H Shaw | 20 | Son | Cleaner | England |
| 46 | Thomas Bond | 22 | Step-son | Retired | England |
| 47 | Steward (X) Thompson | 46 | Head | Molder | Massachusetts |
| 48 | Emily Thompson | 43 | Wife | Ball Cover | Massachusetts |
| 49 | Emily Thompson | 15 | Daughter | — | Massachusetts |
| 50 | Frank (X) Platt | 43 | Head | Laborer | Connecticut |
| 51 | Mary Platt | 45 | Wife | Housekeeper | Connecticut |
| 52 | Emelia (X) Dele Bati | 63 | Head | Housekeeper | Canada |
| 53 | Alfred Dele Bati | 32 | Son | Pool Maker | Connecticut |
| 54 | John Inter | 63 | Head | Clerk | Connecticut |
| 55 | Albina (X) Inter | 63 | Wife | Housekeeper | New York |
| 56 | John O'Brien | 65 | Head | Watchman | Ireland |
| 57 | Mary O'Brien | 62 | Wife | Housekeeper | England |
| 58 | Joseph A Morris | 50 | Head | Helper | Massachusetts |
| 59 | Isabella (X) Morris | 48 | Wife | Housekeeper | Rhode Island |
| 60 | Hattie King | 32 | Sister | Helper-Packer | Massachusetts |
| 61 | Arthur La Rose | 43 | Head | Machinist | Canada |
| 62 | Lilea A (X) La Rose | 36 | Wife | Foreman Clerk | Massachusetts |
| 63 | William Connell | 72 | Head | Helper | Ireland |
| 64 | Agnes B (X) Connell | 72 | Wife | Housekeeper | Ireland |
| 65 | Agnes (X) Vasseur | 68 | Head | Laundress | England |
| 66 | Margaret Creamer | 56 | Sister | Housekeeper | England |
| 67 | Amy Creamer | 45 | Sister | Cook | England |
| 68 | Charles E Million | 75 | Head | Retired | England |
| 69 | Mary A (X) Million | 74 | Wife | Housekeeper | Massachusetts |
| 70 | Vincent Million | 32 | Son | Bartender | Massachusetts |
| 71 | Timothy Callahan | 80 | Head | Retired | Ireland |
| 72 | Margaret (X) Callahan | 70 | Wife | Housekeeper | Ireland |
| 73 | Mary A Callahan THIS PERSON | 36 | Daughter | Operator | Connecticut |
| 74 | Thomas Hussey | 62 | Head | Laborer | Ireland |
| 75 | Theresa (X) Hussey | 58 | Wife | Housekeeper | Ireland |
| 76 | Katherine Hussey | 23 | Daughter | Clerk | Massachusetts |
| 77 | John Hussey | 21 | Son | Carpenter | Massachusetts |
| 78 | Timothy Dunn | 71 | Head | Housekeeper | Massachusetts |
| 79 | Annie (X) Dunn | 69 | Wife | Housekeeper | Massachusetts |
| 80 | Pearl G Dunn | 25 | Daughter | Housekeeper | Massachusetts |
Pedigree Summary
Mary
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)