JD
John Duffy — 1920 US Census Record
Linked across censuses1920 United States Federal Census · New York, New York
Our Model Tree links this John Duffy across the 1900, 1910 and 1920 US Censuses in New York, New York (XGBoost, ~Confirmed) — first a head (b.~1877), then head of a 4-person household.
Age 43
b. ~1877
Male
Head
Born: Ireland
Widowed
1920 Census Record Details
| Census Year | 1920 |
| Location | New York, New York |
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1897 |
| 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 | 1918 |
| Birthplace (normalized) | ireland |
| Township / Ward | Borough Of Manhattan |
| Est. Birth Year | ~1877 |
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 |
|---|---|---|---|---|
| John Duffy | Head | — | 43 | ~1877 |
| Michael Clancy | Other | — | 39 | ~1881 |
| Daniel Duffy | Son | — | 12 | ~1908 |
| John Duffy | Son | — | 15 | ~1905 |
Census Appearances
1900
New York, …
Other, age 23
New York, New York · implied b. ~1877 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Ireland |
| Birth Month | April |
| Birth Year | 1877 |
| Year of Immigration | 1900 |
| Naturalization Status | Alien |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Car Cleaner |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
New York, …
Head, age 32
New York, New York · implied b. ~1878 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 7 |
| Children Born | 3 |
| Children Living | 0 |
| Year of Immigration | 1899 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Polisher |
| Industry | Automobile Co. |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
New York, …
Head, age 43
New York, New York · implied b. ~1877 — 4 household members
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1897 |
| 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 | 1918 |
| 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 Duffy across 3 US Census years (1900, 1910 and 1920) in New York, New York, using XGBoost record linkage.
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This person
Anchor record
John Duffy
Head · 1920 · age 43 · b. ~1877 · New York
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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 — New York, New York
Open full size
1920 US Federal Census — New York, New York
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1222unit:1035)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Anderson | 35 | Head | Painter | Sweden |
| 2 | Marie Anderson | 39 | Wife | — | Sweden |
| 3 | Lloyd Anderson | 16 | Son | Errand Boy | Connecticut |
| 4 | Gertrude Anderson | 14 | Daughter | — | New York |
| 5 | Arthur Anderson | 11 | Son | — | New York |
| 6 | Margaret Anderson | 9 | Daughter | — | New York |
| 7 | Victor Bringo | 38 | Head | Painter | Poland |
| 8 | Albert Litt | 29 | Head | Private Sec | New York |
| 9 | Katherine Litt | 26 | Wife | — | New York |
| 10 | Amelia Litt | 6 | Daughter | — | New York |
| 11 | Maud Litt | 3 | Daughter | — | New York |
| 12 | John Clink | 23 | Head | Clerk | New York |
| 13 | Mary Clink | 21 | Wife | — | New York |
| 14 | Meyer Isaac | 46 | Head | Chauffeur | New York |
| 15 | Sadie Isaac | 45 | Wife | — | Austria |
| 16 | Lillian Friedman | 20 | Daughter | Stenographer | Austria |
| 17 | Aaron Lapidus | 44 | Head | Wholesale Con | Russia |
| 18 | Sarah Lapidus | 44 | Wife | — | Russia |
| 19 | Roslyn Lapidus | 18 | Daughter | — | New York |
| 20 | Isidor Lapidus | 11 | Son | — | New York |
| 21 | Joseph Lapidus | 5 | Son | — | New York |
| 22 | Daniel Lapidus | 3 | Son | — | New York |
| 23 | Henry Liebenstein | 47 | Head | Cleaning & Dyeing | Russia |
| 24 | Jacob Liebenstein | 21 | Son | Cleaning & Dyeing | Russia |
| 25 | Eta Liebenstein | 42 | Wife | — | Russia |
| 26 | Sadie Liebenstein | 12 | Daughter | — | New York |
| 27 | Gus Gustafson | 40 | Head | Ice Man | Sweden |
| 28 | Johanna Gustafson | 30 | Wife | — | Norway |
| 29 | Harvey Gustafson | 4 | Son | — | New York |
| 30 | Gustaf Gustafson | 4 | Son | — | New York |
| 31 | Carl Gustafson | 2 | Son | — | New York |
| 32 | Joseph Volney | 30 | Head | Wait | Bohemia |
| 33 | Anna Volney | 19 | Wife | — | Germany |
| 34 | George Villen | 35 | Head | Instructor Iron Work | Pennsylvania |
| 35 | Margaret Villen | 29 | Wife | — | Pennsylvania |
| 36 | Lillian Banker | 14 | Daughter | — | New Jersey |
| 37 | Frank Hill | 38 | Boarder | Instructor Iron Work | Finland |
| 38 | Michael Yorke | 38 | Head | Court Attnd | Ireland |
| 39 | Isabell Yorke | 23 | Wife | — | Ireland |
| 40 | Michael Yorke | 1 | Son | — | New York |
| 41 | John Duffy THIS PERSON | 43 | Head | — | Ireland |
| 42 | John Duffy | 15 | Son | — | New York |
| 43 | Daniel Duffy | 12 | Son | — | New York |
| 44 | Michael Clancy | 39 | Brother | Salesman | Ireland |
| 45 | Cornelius Cronin | 32 | Head | Bartender | Ireland |
| 46 | Catherine Cronin | 36 | Wife | — | Ireland |
| 47 | Joseph Cronin | 4 | Son | — | New York |
| 48 | Josephine Cronin | 2 | Daughter | — | New York |
| 49 | Marion Cronin | 1 | Daughter | — | New York |
| 50 | John Cronin | 1 | Son | — | New York |
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)