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.~1866), then head of a 3-person household.
Age 54
b. ~1866
Male
Head
Born: Ireland
Widowed
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 | 54 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1884 |
| Naturalization Status | Naturalized |
| 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 | 1895 |
| Birthplace (normalized) | ireland |
| Township / Ward | Cambridge City |
| Est. Birth Year | ~1866 |
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 |
|---|---|---|---|---|
| Alice Callahan | Daughter | — | 19 | ~1901 |
| John Callahan | Head | — | 54 | ~1866 |
| John Callahan | Son | — | 25 | ~1895 |
Census Appearances
1900
Middlesex, Massachusetts
Head, age 35
Middlesex, Massachusetts · implied b. ~1865 — 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 | 34 |
| Marital Status | Married |
| Birthplace | Ireland |
| Birth Month | June |
| Birth Year | 1865 |
| Year of Immigration | 1882 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Peddler |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Middlesex, Massachusetts
Head, age 42
Middlesex, Massachusetts · implied b. ~1868 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 17 |
| Year of Immigration | 1885 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Watchman |
| Industry | Railroad |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Middlesex, Massachusetts
Head, age 54
Middlesex, Massachusetts · implied b. ~1866 — 3 household members
| Surname | Callahan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1884 |
| Naturalization Status | Naturalized |
| 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 | 1895 |
| 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 Middlesex, Massachusetts, using XGBoost record linkage.
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This person
Anchor record
John Callahan
Head · 1920 · age 54 · b. ~1866 · 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
28 people indexed on this census page (ia:1920:14thcensusofpopu707unit:0173)
| Line | Name | Age | Relation | Birthplace |
|---|---|---|---|---|
| 51 | Thomas W Sullivan | 53 | Head | Massachusetts |
| 52 | Alberta L Sullivan | 45 | Wife | Canada |
| 53 | Mary F Sullivan | 16 | Daughter | Massachusetts |
| 54 | Francis J Sullivan | 14 | Son | Massachusetts |
| 55 | Thomas K Sullivan | 13 | Son | Massachusetts |
| 56 | Louise G Sullivan | 11 | Daughter | Massachusetts |
| 57 | Alice Sullivan | 10 | Daughter | Massachusetts |
| 58 | Louis Mullin | 57 | Head | Ireland |
| 59 | Julia Mullin | 50 | Wife | Ireland |
| 60 | Margaret Mullin | 27 | Daughter | Massachusetts |
| 61 | Catherine Mullin | 25 | Daughter | Massachusetts |
| 62 | Mary Mullin | 22 | Daughter | Massachusetts |
| 63 | John J Cullen | 57 | Head | Ireland |
| 64 | John J Jr Cullen | 25 | Son | Massachusetts |
| 65 | Catherine A Cullen | 22 | Daughter | Massachusetts |
| 66 | Peter F Cullen | 20 | Son | Massachusetts |
| 67 | James J Cullen | 18 | Son | Massachusetts |
| 68 | Michael F Carroll | 25 | Head | Massachusetts |
| 69 | Matilda C Carroll | 24 | Wife | Massachusetts |
| 70 | Joseph M Carroll | 3 | Son | Massachusetts |
| 71 | Mary Carroll | 1 | Daughter | Massachusetts |
| 72 | John Callahan THIS PERSON | 54 | Head | Ireland |
| 73 | John K Callahan | 25 | Son | Massachusetts |
| 74 | Alice Callahan | 19 | Daughter | Massachusetts |
| 75 | John J Nugent | 50 | Head | Massachusetts |
| 76 | Nellie F Nugent | 40 | Sister | Massachusetts |
| 77 | Gertrude R Nugent | 32 | Sister | Massachusetts |
| 78 | Catherine F Leahy | 22 | Niece | Ireland |
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)