WC
William Callahan — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this William Callahan across the 1910 and 1920 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1904), then head of a 6-person household.
Age 16
b. ~1904
Male
Son
Born: Massachusetts
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Middlesex, Massachusetts |
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Somerville 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.
6 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Patrick Callahan | Son | — | 27 | ~1893 |
| William Callahan | Son | — | 16 | ~1904 |
| Virginia Callahan | Daughter | — | 24 | ~1896 |
| Mary Callahan | Head | — | 56 | ~1864 |
| Edward Callahan | Son | — | 18 | ~1902 |
| Catherine Callahan | Daughter | — | 22 | ~1898 |
Census Appearances
1910
Middlesex, Massachusetts
Son, age 6
Middlesex, Massachusetts · implied b. ~1904 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Middlesex, Massachusetts
Son, age 16
Middlesex, Massachusetts · implied b. ~1904 — 6 household members
| Surname | Callahan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | 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 2 US Census years (1910 and 1920) in Middlesex, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
William Callahan
Son · 1920 · age 16 · b. ~1904 · Massachusetts
★ You are viewing this record
Sibling
Edward Callahan
Sibling · 1920 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Callahan
Sibling · 1920 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patrick Callahan
Sibling · 1920 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Callahan
Sibling · 1920 · age 24
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
1920 US Federal Census — Middlesex, Massachusetts
Open full size
1920 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu717unit:0825)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Albert Thompson | 14 | Son | — | Connecticut |
| 52 | Raymond Thompson | 8 | Son | — | Connecticut |
| 53 | Joan Francis | 28 | Head | Teamster | Massachusetts |
| 54 | Marguerite Francis | 25 | Wife | — | Massachusetts |
| 55 | Marguerite Francis | 4 | Daughter | — | Massachusetts |
| 56 | Helen Francis | 2 | Daughter | — | Massachusetts |
| 57 | John Crowley | 30 | Head | Dealer | Massachusetts |
| 58 | Johanna Crowley | 31 | Wife | — | Massachusetts |
| 59 | John Crowley | 3 | Son | — | Massachusetts |
| 60 | William Crowley | 1 | Son | — | Massachusetts |
| 61 | John Crowley | 68 | Father | — | Ireland |
| 62 | William P. Crowley | 26 | Brother | — | Massachusetts |
| 63 | Thomas Kennedy | 25 | Head | Express Messenger | Massachusetts |
| 64 | Johanna Kennedy | 64 | Mother | — | Canada |
| 65 | Wilfred Kennedy | 4 | Nephew | — | Massachusetts |
| 66 | Edward Gallagher | 37 | Head | Keeper | Massachusetts |
| 67 | Margaret Gallagher | 39 | Wife | — | Massachusetts |
| 68 | Eleanor Gallagher | 15 | Daughter | — | Massachusetts |
| 69 | Catherine Gallagher | 14 | Daughter | — | Massachusetts |
| 70 | Ruth Gallagher | 12 | Daughter | — | Massachusetts |
| 71 | Mary Gallagher | 11 | Daughter | — | Massachusetts |
| 72 | Marjorie Gallagher | 9 | Daughter | — | Massachusetts |
| 73 | Frank Keifen | 44 | Head | Teamster | Massachusetts |
| 74 | Catherine Keifen | 43 | Wife | — | Ireland |
| 75 | Arthur Keifen | 14 | Son | — | Massachusetts |
| 76 | Harriet Ward | 11 | Niece | — | New Jersey |
| 77 | William Haley | 46 | Head | Helper | Massachusetts |
| 78 | Lena Haley | 38 | Wife | — | Massachusetts |
| 79 | Louise Haley | 15 | Daughter | — | Massachusetts |
| 80 | Francis Haley | 13 | Son | — | Massachusetts |
| 81 | Helen Haley | 10 | Daughter | — | Massachusetts |
| 82 | Theodore Haley | 8 | Son | — | Massachusetts |
| 83 | Vincent Haley | 6 | Son | — | Massachusetts |
| 84 | Sarah Mitchell | 53 | Head | Domestic | Canada |
| 85 | Inez Walker | 69 | Head | Blacksmith Shop | Maine |
| 86 | Georgiana Wilcox | 47 | Housekeeper | Housekeeper | Canada |
| 87 | Sophia Hadelwhite | 79 | Head | — | Prague B+M |
| 88 | Sophie J. Hadelwhite | 42 | Daughter | Clerk | Prague B+M |
| 89 | Mary Hadelwhite | 44 | Daughter | Bookkeeper | Prague B+M |
| 90 | Frederick Flagg | 32 | Head | Shoe Maker | Massachusetts |
| 91 | Mary Flagg | 31 | Wife | — | Massachusetts |
| 92 | Mary Lomas | 41 | Head | Weaver | Massachusetts |
| 93 | Catherine Quick | 45 | Head | Labeller | Massachusetts |
| 94 | William Quick | 16 | Son | Messenger | Massachusetts |
| 95 | Mary Callahan | 56 | Head | — | Ireland |
| 96 | Patrick Callahan | 27 | Son | Electrician | Massachusetts |
| 97 | Virginia Callahan | 24 | Daughter | — | Massachusetts |
| 98 | Catherine Callahan | 22 | Daughter | — | Massachusetts |
| 99 | Edward Callahan | 18 | Son | Attendant | Massachusetts |
| 100 | William Callahan THIS PERSON | 16 | Son | — | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)