JC
John Callahan — 1910 US Census Record
Linked across censuses1910 United States Federal Census · Dubuque, Iowa
Our Model Tree links this John Callahan across the 1900 and 1910 US Censuses in Dubuque, Iowa (XGBoost, ~Confirmed) — first a head (b.~1865), then head of a 10-person household.
Age 45
b. ~1865
Male
Head
Born: Iowa
Married
1910 Census Record Details
| Census Year | 1910 |
| Location | Dubuque, Iowa |
| Surname | Callahan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Iowa |
| Years Married | 17 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Stock Seller |
| Industry | Domestic Animals |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Stock Seller |
| Township / Ward | Vernon Township |
| Est. Birth Year | ~1865 |
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.
10 people recorded at the same address in the 1910 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Agnes Callahan | Daughter | — | 12 | ~1898 |
| Annie Callahan | Daughter | — | 8 | ~1902 |
| Mary Callahan | Daughter | — | 16 | ~1894 |
| John Callahan | Head | — | 45 | ~1865 |
| Mary Broderick | Other | — | 39 | ~1871 |
| James Callahan | Son | — | 10 | ~1900 |
| Joseph Callahan | Son | — | 15 | ~1895 |
| William Callahan | Son | — | 3 | ~1907 |
| Frank Callahan | Son | — | 6 | ~1904 |
| Annie Callahan | Spouse | — | 39 | ~1871 |
Census Appearances
1900
Dubuque, Iowa
Head, age 36
Dubuque, Iowa · implied b. ~1864 — 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 | 36 |
| Marital Status | Married |
| Birthplace | Iowa |
| Birth Month | May |
| Birth Year | 1864 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Stock drover |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1910
Dubuque, Iowa
Head, age 45
Dubuque, Iowa · implied b. ~1865 — 10 household members
| Surname | Callahan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Iowa |
| Years Married | 17 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Stock Seller |
| Industry | Domestic Animals |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 2 US Census years (1900 and 1910) in Dubuque, Iowa, using XGBoost record linkage.
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This person
Anchor record
John Callahan
Head · 1910 · age 45 · b. ~1865 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1910 US Federal Census — Dubuque, Iowa
Open full size
1910 US Federal Census — Dubuque, Iowa
Page Contents
46 people indexed on this census page (ia:1910:13thcensus1910po401unit:0851)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Gustav Poulos | 24 | Head | Laborer | Greece |
| 52 | Athanasios Poulos | 24 | Boarder | Laborer | Greece |
| 53 | Gustav Poulos | 21 | Boarder | Laborer | Greece |
| 54 | Gustav Poulos | 21 | Boarder | Laborer | Greece |
| 55 | James Poulos | 21 | Boarder | Laborer | Greece |
| 56 | John Poulos | 21 | Boarder | Laborer | Greece |
| 57 | Carl Poulos | 21 | Boarder | Laborer | Greece |
| 58 | Joseph Poulos | 40 | Boarder | Laborer | Greece |
| 59 | Ralph Poulos | 22 | Boarder | Laborer | Greece |
| 60 | John Poulos | 40 | Boarder | Laborer | New York |
| 61 | Martin Poulos | 36 | Boarder | Laborer | Wisconsin |
| 62 | James Carlin | 55 | Head | — | New York |
| 63 | Mary Carlin | 55 | Wife | — | Connecticut |
| 64 | Annie Carlin | 30 | Daughter | Seamstress | Iowa |
| 65 | Agnes Carlin | 24 | Daughter | Servant | Iowa |
| 66 | Lizzie Carlin | 22 | Daughter | Servant | Iowa |
| 67 | Catherine Lynn | 50 | Sister in law | — | Ireland |
| 68 | Michael Lynch | 41 | Head | Merchant | Iowa |
| 69 | Catherine Lynch | 31 | Wife | — | Iowa |
| 70 | Philip Lynch | 8 | Son | — | Iowa |
| 71 | Marie Lynch | 7 | Daughter | — | Iowa |
| 72 | Angeline Lynch | 5 | Daughter | — | Iowa |
| 73 | Cecelia Lynch | 4 | Daughter | — | Iowa |
| 74 | Michael Jr. Lynch | 1 | Son | — | Iowa |
| 75 | Michael Hall | 30 | Boarder | Mail Carrier | Iowa |
| 76 | Louis Lynch | 23 | Boarder | Telegraph Agent | Wisconsin |
| 77 | Peterson Moore | 42 | Head | — | Iowa |
| 78 | Emma Moore | 37 | Wife | — | Iowa |
| 79 | John Callahan THIS PERSON | 45 | Head | Stock Seller | Iowa |
| 80 | Annie Callahan | 39 | Wife | — | Iowa |
| 81 | Mary Callahan | 16 | Daughter | — | Iowa |
| 82 | Joseph Callahan | 15 | Son | — | Iowa |
| 83 | Agnes Callahan | 12 | Daughter | — | Iowa |
| 84 | James Callahan | 10 | Son | — | Iowa |
| 85 | Annie Callahan | 8 | Daughter | — | Iowa |
| 86 | Frank Callahan | 6 | Son | — | Iowa |
| 87 | William Callahan | 3 | Son | — | Iowa |
| 88 | Mary Broderick | 39 | Sister in law | — | Iowa |
| 89 | Arthur Chapman | 44 | Head | Merchant | Iowa |
| 90 | Elizabeth Chapman | 45 | Wife | — | Iowa |
| 91 | Mary Chapman | 24 | Daughter | — | Iowa |
| 92 | Edward Chapman | 21 | Son | Apprentice | Iowa |
| 93 | William Chapman | 19 | Son | Farm Laborer | Iowa |
| 94 | Henry George | 47 | Head | Proprietor | Iowa |
| 95 | Marguerite George | 40 | Wife | — | Iowa |
| 96 | Mary George | 2 | Daughter | — | Iowa |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1910 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)