JD
John Duffy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Shelby-County, Indiana
Our Model Tree links this John Duffy across the 1920, 1930 and 1940 US Censuses in Shelby-County, Indiana (XGBoost, ~Confirmed), with identified parents Byron & Emma — first a son (b.~1895), then head of a 2-person household.
Age 45
b. ~1895
Male
Son
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Shelby-County, Indiana |
| Surname | Duffy |
| Given Name | John M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | City Shelbyville |
| 1935 Residence (County) | Shelby |
| Additional Details | |
| Occupation | Insurance Agt |
| Industry | Insurance |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 40 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Insurance Agent |
| Township / Ward | City Shelbyville |
| Est. Birth Year | ~1895 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Emma Duffy | Head | — | 79 | ~1861 |
| John Duffy | Son | — | 45 | ~1895 |
Census Appearances
1920
Shelby, Indiana
Son, age 25
Shelby, Indiana · implied b. ~1895 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | John M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | Bookkeeper |
| Industry | Bank |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Shelby, Indiana
Son, age 35
Shelby, Indiana · implied b. ~1895 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | Cashier |
| Industry | Bank |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Shelby-County, Indiana
Son, age 45
Shelby-County, Indiana · implied b. ~1895 — 2 household members
| Surname | Duffy |
| Given Name | John M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | City Shelbyville |
| 1935 Residence (County) | Shelby |
| Occupation | Insurance Agt |
| Industry | Insurance |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 40 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 Duffy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Byron Duffy (~0.92 confidence) and mother Emma Duffy (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Byron Duffy
b. ~1856
Source father
● Household
· direct · ~0.92
Mother
Emma Duffy
b. ~1861
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Duffy
Son · 1940 · age 45 · b. ~1895 · Indiana
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Shelby-County, Indiana
Open full size
1940 US Federal Census — Shelby-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01094-00408)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Katharyne Auxier | 33 | Wife | Helper | Indiana |
| 42 | Albert Morris White | 36 | Head | Dentist | Indiana |
| 43 | Elnor Lucile White | 33 | Wife | Attendance Officer | Indiana |
| 44 | Kate Lee | 76 | Mother-in-law | — | Indiana |
| 45 | Ralph Cochran | 46 | Head | District Supervisor | Indiana |
| 46 | Estella Cochran | 43 | Wife | — | Indiana |
| 47 | Charles W. Cochran | 9 | Son | — | Indiana |
| 48 | Lora M. Mahan | 60 | Head | — | Indiana |
| 49 | Nellie Lympus | 70 | Sister | — | Indiana |
| 50 | Goldie Mae Hobs | 23 | Lodger | Stenographer | Indiana |
| 51 | Harold E. Lockridge | 37 | Head | Finisher | Indiana |
| 52 | Leuna E. Lockridge | 45 | Wife | — | Indiana |
| 53 | Emma Sue Duffy | 79 | Head | — | Indiana |
| 54 | John M. Duffy THIS PERSON | 45 | Son | Insurance Agt | Kentucky |
| 55 | Otto W. Harris | 56 | Head | Industrial Art | Indiana |
| 56 | Ethel M. Harris | 53 | Wife | — | Indiana |
| 57 | Catharine L. Harris | 27 | Daughter | Stenographer | Indiana |
| 58 | Pauline Harris | 26 | Daughter | — | Indiana |
| 59 | Mary Margaret Harris | 18 | Daughter | — | Indiana |
| 60 | Orville D. Rainey | 32 | Head | Salesman | Indiana |
| 61 | Mary C. Rainey | 25 | Wife | — | Indiana |
| 62 | Marcia N. Rainey | 6 | Daughter | — | Indiana |
| 63 | Lowell G. Rainey | 5 | Son | — | Indiana |
| 64 | Patricia K. Rainey | 1 | Daughter | — | Indiana |
| 65 | Frank Grant Turner | 46 | Head | Truck Driver | Kentucky |
| 66 | Vonia Turner | 37 | Wife | — | Kentucky |
| 67 | Gilbert Rod Turner | 17 | Son | — | Kentucky |
| 68 | Anna Lucile Turner | 14 | Daughter | — | Kentucky |
| 69 | Grant J. R. Turner | 13 | Son | — | Indiana |
| 70 | Joeneta Turner | 8 | Daughter | — | Indiana |
| 71 | Robert Joe Turner | 12 | Son | — | Indiana |
| 72 | Russell L. Kuhn | 33 | Head | Finisher | Indiana |
| 73 | Gertrude Kuhn | 32 | Wife | Bag Maker | Indiana |
| 74 | Jack Kuhn | 8 | Son | Bag Maker | Indiana |
| 75 | Lois May Kuhn | 5 | Daughter | — | Indiana |
| 76 | Betty Jean Larkey | 13 | Step Daughter | — | Indiana |
| 77 | Anha M. Fagel | 52 | Head | Bookkeeper | Indiana |
| 78 | Francis C. Bennett | 26 | Nephew | Salesman | Indiana |
| 79 | Henrietta Bennett | 21 | Niece | — | Indiana |
| 80 | Norma Jean Bennett | 3 | Great Niece | — | Indiana |
Pedigree Summary
John
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)