JC
John Callahan — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Montgomery, Pennsylvania
Our Model Tree links this John Callahan across the 1900, 1910 and 1920 US Censuses in Montgomery, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1841), then head of a 4-person household.
Age 79
b. ~1841
Male
Head
Born: Ireland
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Montgomery, Pennsylvania |
| Surname | Callahan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 79 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1860 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Laborer |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Laborer |
| Township / Ward | Springfield Township Part Of |
| Est. Birth Year | ~1841 |
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.
4 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Nellie O'Drain | Daughter | — | 39 | ~1881 |
| John Callahan | Head | — | 79 | ~1841 |
| Anna O'Drain | Other | — | 14 | ~1906 |
| Marie O'Drain | Other | — | 11 | ~1909 |
Census Appearances
1900
Philadelphia, Pennsylvania
Head, age 60
Philadelphia, Pennsylvania · implied b. ~1840 — 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 | 60 |
| Marital Status | Married |
| Birthplace | Ireland |
| Birth Month | Mar |
| Birth Year | 1840 |
| Year of Immigration | 1850 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Printer |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Montgomery, Pennsylvania
Head, age 67
Montgomery, Pennsylvania · implied b. ~1843 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 45 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Industry | Odd Jobs |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Montgomery, Pennsylvania
Head, age 79
Montgomery, Pennsylvania · implied b. ~1841 — 4 household members
| Surname | Callahan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 79 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1860 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| 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 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 79 · b. ~1841 · Pennsylvania
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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 — Montgomery, Pennsylvania
Open full size
1920 US Federal Census — Montgomery, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1605unit:1027)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | George H. Geiges | 20 | Son | Clerk | Pennsylvania |
| 52 | William J. Geiges | 20 | Daughter|Son | — | Pennsylvania |
| 53 | Florence E. Geiges | 22 | Daughter | Seamer | Pennsylvania |
| 54 | Raymond Geiges | 18 | Son | — | Pennsylvania |
| 55 | William P. Howett | 65 | Head | Books | Pennsylvania |
| 56 | Mary A. Howett | 33 | Wife | — | Pennsylvania |
| 57 | Emeline G. Howett | 65 | Wife | — | Pennsylvania |
| 58 | James E. Keenan | 60 | Head | Lawyer | Pennsylvania |
| 59 | Maude B. Keenan | 55 | Wife | — | Pennsylvania |
| 60 | Edward A. Keenan | 25 | Son | Automobile | Pennsylvania |
| 61 | Francis B. Keenan | 18 | Daughter | — | Pennsylvania |
| 62 | Fred W. Farmer | 43 | Head | Asst. Supt. | Pennsylvania |
| 63 | George B. Farmer | 45 | Brother | Supt. | Pennsylvania |
| 64 | Sophia Farmer | 69 | Mother | — | Germany |
| 65 | John C. Arnold | 63 | Head | Electric Railway | Pennsylvania |
| 66 | Jennie Arnold | 60 | Wife | — | Pennsylvania |
| 67 | George H. Kimbel | 38 | Head | Carpenter | Pennsylvania |
| 68 | Emma A. Kimbel | 39 | Wife | — | Germany |
| 69 | Thomas J. Weiss | 38 | Head | Clerk | Pennsylvania |
| 70 | Margaret E. Weiss | 68 | Mother | — | Switzerland |
| 71 | Gilbert H. Weiss | 10 | Son | — | Pennsylvania |
| 72 | George H. Dumbellberger | 38 | Head | Clerk | Pennsylvania |
| 73 | Harry B. Dumbellberger | 34 | Brother | Business | Pennsylvania |
| 74 | Elizabeth Dumbellberger | 63 | Mother | — | Pennsylvania |
| 75 | Herbert M. Dumbellberger | 40 | Sister | — | Pennsylvania |
| 76 | Peter A. Sorenson | 48 | Head | Business | Denmark |
| 77 | Matilda M. Sorenson | 50 | Wife | — | Pennsylvania |
| 78 | Lydia S. Day | 78 | Mother-in-law | — | Pennsylvania |
| 79 | Margaret D. Best | 69 | Aunt | — | Pennsylvania |
| 80 | Albert Bredin | 27 | Head | Business | Pennsylvania |
| 81 | Jennie Bredin | 25 | Wife | — | Pennsylvania |
| 82 | Marie Bredin | 5 | Daughter | — | Pennsylvania |
| 83 | Albert Jr. Bredin | 4 | Son | — | Pennsylvania |
| 84 | Christian Bredin | 58 | Father | — | Germany |
| 85 | John Lloyd | 49 | Head | Business | Ireland |
| 86 | Isabelle Lloyd | 38 | Wife | — | Ireland |
| 87 | John Jr. Lloyd | 15 | Son | — | Ireland |
| 88 | Muriel Lloyd | 11 | Daughter | — | Ireland |
| 89 | Florence Lloyd | 9 | Daughter | — | Ireland |
| 90 | Edith M. Lloyd | 7 | Daughter | — | Ireland |
| 91 | Rebecca J. Lloyd | 5 | Daughter | — | Pennsylvania |
| 92 | Isabelle M. Lloyd | 3 | Daughter | — | Pennsylvania |
| 93 | John Callahan THIS PERSON | 79 | Head | Laborer | Ireland |
| 94 | Nellie J. O'Drain | 39 | Daughter | Laborer | Pennsylvania |
| 95 | Anna O'Drain | 14 | Granddaughter | — | Pennsylvania |
| 96 | Marie E. O'Drain | 11 | Granddaughter | — | Pennsylvania |
| 97 | John C. Ferry | 55 | Head | Wheelwright | Pennsylvania |
| 98 | Susanna Ferry | 52 | Wife | — | Ireland |
| 99 | Francis B. Ferry | 29 | Son | Operator | Pennsylvania |
| 100 | Ferry | None | — | — | — |
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)