MC
Mary Callahan — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this Mary Callahan across the 1920, 1930 and 1940 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1862), then head of a 5-person household.
Age 68
b. ~1862
Female
Head
Born: Ireland
Widowed
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | Callahan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 68 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Home-W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 20.00 |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Home-W |
| Township / Ward | City Of Boston |
| Est. Birth Year | ~1862 |
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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Edna Callahan | Daughter | — | 17 | ~1913 |
| Emily Callahan | Daughter | — | 40 | ~1890 |
| Mary Callahan | Head | — | 68 | ~1862 |
| Margaret Harvey | Other | — | 43 | ~1887 |
| James Harvey | Other | — | 24 | ~1906 |
Census Appearances
1920
Suffolk, Massachusetts
Other, age 61
Suffolk, Massachusetts · implied b. ~1859 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Mary |
| Relationship to Head | Sister |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Single |
| Birthplace | Ireland |
| Year of Immigration | 1880 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Suffolk, Massachusetts
Head, age 68
Suffolk, Massachusetts · implied b. ~1862 — 5 household members
| Surname | Callahan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 68 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Home-W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 20.00 |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Suffolk-County, Massachusetts
Other, age 77
Suffolk-County, Massachusetts · implied b. ~1863 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Mary F |
| Relationship to Head | Mother-in-law |
| Sex | F |
| Color / Race | White |
| Age | 77 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | First papers filed |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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.
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This person
Anchor record
Mary Callahan
Head · 1930 · age 68 · b. ~1862 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Suffolk, Massachusetts
Open full size
1930 US Federal Census — Suffolk, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel943:0059)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Lavelle | 65 | Head | — | Ireland |
| 2 | Anna Lavelle | 20 | Daughter | Telephone Operator | Massachusetts |
| 3 | Daniel Doherty | 24 | Roomer | Chauffeur | Ireland |
| 4 | Owen Doherty | 24 | Roomer | Laborer | Ireland |
| 5 | William Mcdonagh | 30 | Roomer | Truck | Ireland |
| 6 | Owen Mclaughlin | 24 | Roomer | Helper | Ireland |
| 7 | G. Christy Dado | 45 | Roomer | Cook | Albania |
| 8 | Alfred Porcarro | 40 | Head | Engineer | Italy |
| 9 | Angelina Porcarro | 36 | Wife | — | Italy |
| 10 | Joseph Porcarro | 14 | Son | — | Massachusetts |
| 11 | Arline Porcarro | 12 | Daughter | — | Massachusetts |
| 12 | Angelo Porcarro | 5 | Son | — | Massachusetts |
| 13 | John Crosby | 57 | Head | Pressman | Philadelphia |
| 14 | Catherine Crosby | 56 | Wife | — | Ireland |
| 15 | Herbert Crosby | 31 | Son | Salesman | Massachusetts |
| 16 | John Crosby | 29 | Son | Salesman | Massachusetts |
| 17 | John O'Hara | 25 | Nephew | Helper | Ireland |
| 18 | Catherine O'Shea | 58 | Head | — | Canada |
| 19 | Robert O'Shea | 37 | Son | Floorlayer | Canada |
| 20 | Matilda O'Shea | 33 | Wife | Dressmaker | Massachusetts |
| 21 | William O'Shea | 42 | Son | Teamster | Canada |
| 22 | Anna O'Shea | 42 | Wife | Maid | Canada |
| 23 | Andrew J. Turkey | 18 | Son | Battery Station | Massachusetts |
| 24 | — | None | — | — | — |
| 25 | — | None | — | — | — |
| 26 | Chester Bassett | 34 | Head | Brakeman | Massachusetts |
| 27 | Alice R. Bassett | 35 | Wife | — | Massachusetts |
| 28 | Alice W. Bassett | 14 | Daughter | — | Massachusetts |
| 29 | Dorothy Bassett | 9 | Daughter | — | Massachusetts |
| 30 | Chester G. Bassett | 6 | Son | — | Massachusetts |
| 31 | Frederick Bassett | 5 | Son | — | Massachusetts |
| 32 | Hazel Bassett | 4 | Daughter | — | Massachusetts |
| 33 | Bessie Bassett | 3 | Daughter | — | Massachusetts |
| 34 | Ellen Bassett | 57 | Mother | — | Massachusetts |
| 35 | Louis Richards | 46 | Head | Repairman | Massachusetts |
| 36 | Helen Richards | 46 | Wife | — | Massachusetts |
| 37 | John Richards | 15 | Son | — | Massachusetts |
| 38 | Mary Callahan THIS PERSON | 68 | Head | Home-W | Ireland |
| 39 | Emily Callahan | 40 | Daughter | Forelady | Massachusetts |
| 40 | Edna Callahan | 17 | Daughter | — | Massachusetts |
| 41 | James Harvey | 24 | Boarder | Shipper | Massachusetts |
| 42 | Margaret Harvey | 43 | Boarder | Sells Lady | Massachusetts |
| 43 | Harry Donnelly | 40 | Head | Social Worker | Massachusetts |
| 44 | Hilda Donnelly | 41 | Wife | — | England |
| 45 | Frederick Donnelly | 9 | Son | — | Massachusetts |
| 46 | Michael Castellano | 46 | Head | Salesman | Italy |
| 47 | Rose Castellano | 39 | Wife | — | Massachusetts |
| 48 | Theresa Castellano | 20 | Daughter | Saleslady | Massachusetts |
| 49 | Frank Castellano | 18 | Son | — | Massachusetts |
| 50 | Elinor Castellano | 15 | Daughter | — | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)