WC
William Callahan — 1930 US Census Record
Model Tree available1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this William Callahan across the 1910, 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a son (b.~1909), then head of a 7-person household.
Age 21
b. ~1909
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | Reporter |
| Industry | Newspaper |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Reporter |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1909 |
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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Francis Callahan | Son | — | 13 | ~1917 |
| William Callahan | Son | — | 21 | ~1909 |
| Margaret Callahan | Daughter | — | 17 | ~1913 |
| Margaret Callahan | Other | — | 49 | ~1881 |
| Thomas Callahan | Son | — | 25 | ~1905 |
| George Callahan | Son | — | 19 | ~1911 |
| Thomas Callahan | Head | — | 54 | ~1876 |
Census Appearances
1910
Middlesex, Massachusetts
Son, age 2
Middlesex, Massachusetts · implied b. ~1908 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Middlesex, Massachusetts
Son, age 11
Middlesex, Massachusetts · implied b. ~1909 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 21
Middlesex, Massachusetts · implied b. ~1909 — 7 household members
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Reporter |
| Industry | Newspaper |
| Class of Worker | W |
| Can Read/Write | Yes |
| 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 William Callahan across 3 US Census years (1910, 1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage. Identified parents: father Thomas Callahan (~0.92 confidence) and father Thomas Callahan (~0.92 confidence) and mother Margaret Callahan (~0.92 confidence) and father William 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
Thomas Callahan
b. ~1875
Source father
● Household
· direct · ~0.92
Father
Thomas Callahan
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Margaret Callahan
b. ~1877
Source mother
● Household
· direct · ~0.92
Father
William Callahan
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Margaret Callahan
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Callahan
Son · 1930 · age 21 · b. ~1909 · Massachusetts
★ You are viewing this record
Sibling
Francis Callahan
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Callahan
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Callahan
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Callahan
Sibling · 1930 · age 19
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
1930 US Federal Census — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel928:0088)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Anna Doherty | 47 | Wife-H | — | Irish Free State |
| 52 | Robert J. Doherty | 19 | Son | Office-Clerk | Massachusetts |
| 53 | Henry Cartledge | 54 | Head | Stationary Engineer | England |
| 54 | Mary Cartledge | 50 | Wife-H | — | Newfoundland |
| 55 | Madeline Cartledge | 32 | Daughter | Stenographer | Canada-English |
| 56 | Alexander Cartledge | 30 | Son | Elevator Operator | Massachusetts |
| 57 | Mary Cartledge | 22 | Daughter | — | Massachusetts |
| 58 | Thomas Donegan | 54 | Head | Gardener | Irish Free State |
| 59 | Margaret Donegan | 43 | Wife-H | — | Irish Free State |
| 60 | Agnes Donegan | 18 | Daughter | Stenographer | Massachusetts |
| 61 | Bernard Donegan | 17 | Son | Messenger | Massachusetts |
| 62 | Thomas Donegan | 14 | Son | — | Massachusetts |
| 63 | Margaret Donegan | 13 | Daughter | — | Massachusetts |
| 64 | Kathleen Donegan | 10 | Daughter | — | Massachusetts |
| 65 | Agnes Moriarty | 40 | Head-H | — | Massachusetts |
| 66 | Paul Moriarty | 14 | Son | — | Massachusetts |
| 67 | Robert Moriarty | 12 | Son | — | Massachusetts |
| 68 | Charles Moriarty | 9 | Son | — | Massachusetts |
| 69 | John Souza | 38 | Head | Packer | Portugal |
| 70 | Idalina Souza | 32 | Wife-H | Tailoress | Portugal |
| 71 | Mary Lopes | 74 | Mother-in-law | — | Portugal |
| 72 | Joseph Perry | 35 | Head | Oiler | Portugal |
| 73 | Mary Perry | 29 | Wife-H | — | Portugal |
| 74 | Walter Perry | 5 | Son | — | Massachusetts |
| 75 | Gilbert Perry | 3 | Son | — | Massachusetts |
| 76 | Robert Evans | 38 | Head | Mechanic | Australia |
| 77 | Agnes Evans | 35 | Wife-H | Waitress | Northern Ireland |
| 78 | Rebecca Geddis | 75 | Head-H | — | Northern Ireland |
| 79 | Gordon Peck | 35 | Head | Painter | Canada-English |
| 80 | Georgina Peck | 28 | Wife-H | — | Canada-English |
| 81 | Manuel Pacheco | 42 | Head | General Helper | Portugal |
| 82 | Mary G. Pacheco | 36 | Wife-H | — | Portugal |
| 83 | Edith Pacheco | 10 | Daughter | — | Massachusetts |
| 84 | Mary Pacheco | 3 | Daughter | — | Massachusetts |
| 85 | Ellen Lawton | 60 | Head-H | Matron | Massachusetts |
| 86 | Thomas J. Callahan | 54 | Head | Compositor | Massachusetts |
| 87 | Margaret Callahan | 49 | Wife-H | — | Massachusetts |
| 88 | Thomas J. Jr. Callahan | 25 | Son | Manager | Massachusetts |
| 89 | William Callahan THIS PERSON | 21 | Son | Reporter | Massachusetts |
| 90 | George Callahan | 19 | Son | Office Clerk | Massachusetts |
| 91 | Margaret Callahan | 17 | Daughter | — | Massachusetts |
| 92 | Francis X. Callahan | 13 | Son | — | Massachusetts |
| 93 | Annie Bragan | 54 | Head-H | Saleslady | Northern Ireland |
| 94 | Walter Flood | 20 | Lodger | Chauffeur | Canada-English |
| 95 | John Flanagan | 40 | Head | Contractor | Irish Free State |
| 96 | Nellie Flanagan | 40 | Wife-H | — | Irish Free State |
| 97 | Lawrence Flanagan | 16 | Son | — | Massachusetts |
| 98 | John Flanagan | 14 | Son | — | Massachusetts |
| 99 | William Flanagan | 10 | Son | — | Massachusetts |
| 100 | Mary Flanagan | 7 | Daughter | — | Massachusetts |
Related Census Records
Pedigree Summary
William + 4 siblings
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 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)