JC
John Callahan — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this John Callahan across the 1900, 1910 and 1920 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1861), then head of a 3-person household.
Age 59
b. ~1861
Male
Head
Born: Ireland
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Middlesex, Massachusetts |
| Surname | Callahan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1883 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Year of Naturalization | 1890 |
| Birthplace (normalized) | ireland |
| Township / Ward | Cambridge City |
| Est. Birth Year | ~1861 |
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 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Callahan | Head | — | 59 | ~1861 |
| James Callahan | Son | — | 20 | ~1900 |
| Julia Callahan | Spouse | — | 50 | ~1870 |
Census Appearances
1900
Suffolk, Massachusetts
Head, age 40
Suffolk, Massachusetts · implied b. ~1860 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Ireland |
| Birth Month | Feb |
| Birth Year | 1860 |
| Year of Immigration | 1878 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Stable Keeper |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Middlesex, Massachusetts
Head, age 49
Middlesex, Massachusetts · implied b. ~1861 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 24 |
| Year of Immigration | 1879 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Industry | Slaughterhouse |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Middlesex, Massachusetts
Head, age 59
Middlesex, Massachusetts · implied b. ~1861 — 3 household members
| Surname | Callahan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1883 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Year of Naturalization | 1890 |
| 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 John Callahan across 3 US Census years (1900, 1910 and 1920) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Callahan
Head · 1920 · age 59 · b. ~1861 · Massachusetts
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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:1920:14thcensusofpopu707unit:0626)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Algeck Buginski | 23 | Son | — | Massachusetts |
| 2 | Helen Buginski | 18 | Daughter | — | Massachusetts |
| 3 | Annie Collins | 65 | Head | — | Ireland |
| 4 | John Callahan THIS PERSON | 59 | Head | — | Ireland |
| 5 | Julia Callahan | 50 | Wife | Laborer | Ireland |
| 6 | James Callahan | 20 | Son | — | Massachusetts |
| 7 | John O'Neil | 46 | Head | Laborer | Ireland |
| 8 | Mary O'Neil | 40 | Wife | Laborer | Ireland |
| 9 | Catherine O'Neil | 15 | Daughter | — | Massachusetts |
| 10 | John O'Neil | 13 | Son | Helper | Massachusetts |
| 11 | Mary O'Neil | 11 | Daughter | — | Massachusetts |
| 12 | Ellen O'Neil | 10 | Daughter | — | Massachusetts |
| 13 | James O'Neil | 8 | Son | — | Massachusetts |
| 14 | Margaret O'Neil | 2 | Daughter | — | Massachusetts |
| 15 | Robert Brown | 33 | Head | Laborer | Massachusetts |
| 16 | Mary Brown | 32 | Wife | — | Massachusetts |
| 17 | Mary Brown | 8 | Daughter | — | Massachusetts |
| 18 | Robert Brown | 5 | Son | — | Massachusetts |
| 19 | Francis Brown | 2 | Son | — | Massachusetts |
| 20 | Timothy Ford | 49 | Head | Laborer | Ireland |
| 21 | Mary Ford | 43 | Wife | — | Ireland |
| 22 | John Ford | 18 | Son | — | Massachusetts |
| 23 | Edward Ford | 16 | Son | Laborer | Massachusetts |
| 24 | Julia Ford | 14 | Son | Errand Boy | Massachusetts |
| 25 | George Ford | 11 | Son | — | Massachusetts |
| 26 | Helen Ford | 9 | Daughter | — | Massachusetts |
| 27 | Mary Ford | 6 | Daughter | — | Massachusetts |
| 28 | Julia Ford | 3 | Daughter | — | Massachusetts |
| 29 | Pierce Mitten | 54 | Head | — | Ireland |
| 30 | Mary Mitten | 54 | Wife | Laborer | Massachusetts |
| 31 | James M. Murphy | 52 | Head | — | Ireland |
| 32 | Mary Murphy | 54 | Wife | Laborer | Massachusetts |
| 33 | Patrick Gatchell | 30 | Head | — | Italy |
| 34 | Alice Gatchell | 27 | Wife | Laborer | Italy |
| 35 | Mary Gatchell | 6 | Daughter | — | Massachusetts |
| 36 | Annie Gatchell | 5 | Daughter | — | Massachusetts |
| 37 | Rose Gatchell | 3 | Daughter | — | Massachusetts |
| 38 | Timothy Graham | 48 | Head | — | Ireland |
| 39 | Julia Graham | 47 | Wife | Scale Machine | Ireland |
| 40 | Eugene Graham | 21 | Son | — | Massachusetts |
| 41 | Catherine Graham | 19 | Daughter | Laborer | Massachusetts |
| 42 | Mary Graham | 15 | Daughter | Helper | Massachusetts |
| 43 | Daniel Graham | 13 | Son | — | Massachusetts |
| 44 | Timothy Graham | 11 | Son | — | Massachusetts |
| 45 | William Tobin | 57 | Head | — | Ireland |
| 46 | Mary Tobin | 57 | Wife | Machinist | Ireland |
| 47 | John B. Tobin | 29 | Son | Laborer | Ireland |
| 48 | William Tobin | 24 | Son | — | Massachusetts |
| 49 | Mary Tobin | 21 | Daughter | Helper | Massachusetts |
| 50 | Alice Tobin | 19 | Daughter | Laborer | 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)