JD
John Duffy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Nicholas, West Virginia
Our Model Tree links this John Duffy across the 1920 and 1930 US Censuses in Nicholas, West Virginia (XGBoost, ~Confirmed) — first a son (b.~1912), then head of a 11-person household.
Age 18
b. ~1912
Male
Son
Born: West Virginia
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Nicholas, West Virginia |
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | West Virginia |
| Father's Birthplace | West Virginia |
| Mother's Birthplace | West Virginia |
| Additional Details | |
| Occupation | Farm laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | West Virginia |
| Birth Country | United States |
| Birthplace (normalized) | west virginia |
| Occupation | Farm Laborer |
| Township / Ward | Hamilton District |
| Est. Birth Year | ~1912 |
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.
11 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Genevieve Duffy | Daughter | — | 11 | ~1919 |
| Gertrude Duffy | Daughter | — | 17 | ~1913 |
| Margaret Duffy | Daughter | — | 9 | ~1921 |
| Alice Duffy | Daughter | — | 20 | ~1910 |
| Gwendolyn Duffy | Daughter | — | 11 | ~1919 |
| John Duffy | Head | — | 43 | ~1887 |
| Eugene Duffy | Son | — | 12 | ~1918 |
| John Duffy | Son | — | 18 | ~1912 |
| William Duffy | Son | — | 7 | ~1923 |
| Oscar Duffy | Son | — | 14 | ~1916 |
| Mary Duffy | Spouse | — | 43 | ~1887 |
Census Appearances
1920
Nicholas, West …
Son, age 8
Nicholas, West Virginia · implied b. ~1912 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | John G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | West Virginia |
| Father's Birthplace | West Virginia |
| Mother's Birthplace | West Virginia |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | West Virginia |
| Birth Country | United States |
| Birthplace (normalized) | west virginia |
1930
Nicholas, West …
Son, age 18
Nicholas, West Virginia · implied b. ~1912 — 11 household members
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | West Virginia |
| Father's Birthplace | West Virginia |
| Mother's Birthplace | West Virginia |
| Occupation | Farm laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | West Virginia |
| Birth Country | United States |
| Birthplace (normalized) | west virginia |
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 2 US Census years (1920 and 1930) in Nicholas, West Virginia, using XGBoost record linkage.
Show:
This person
Anchor record
John Duffy
Son · 1930 · age 18 · b. ~1912 · West Virginia
★ You are viewing this record
Sibling
William Duffy
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Duffy
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Duffy
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Duffy
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Oscar Duffy
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Genevieve Duffy
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gwendolyn Duffy
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Duffy
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Nicholas, West Virginia
Open full size
1930 US Federal Census — Nicholas, West Virginia
Page Contents
50 people indexed on this census page (ia:1930:15thcensus2549unit:0652)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Oscar | 22 | Son | None | West Virginia |
| 2 | Emigene | 17 | Daughter | None | West Virginia |
| 3 | John G. Duffy | 43 | Head | Farmer | West Virginia |
| 4 | Mary Duffy | 43 | Wife | None | West Virginia |
| 5 | Alice Duffy | 20 | Daughter | Teacher | West Virginia |
| 6 | John Duffy THIS PERSON | 18 | Son | Farm Laborer | West Virginia |
| 7 | Gertrude Duffy | 17 | Daughter | None | West Virginia |
| 8 | Oscar Duffy | 14 | Son | Farm Laborer | West Virginia |
| 9 | Eugene Duffy | 12 | Son | None | West Virginia |
| 10 | Genevieve Duffy | 11 | Daughter | None | West Virginia |
| 11 | Gwendolyn Duffy | 11 | Daughter | None | West Virginia |
| 12 | Margaret Duffy | 9 | Daughter | None | West Virginia |
| 13 | William Duffy | 7 | Son | None | West Virginia |
| 14 | John Jarvis | 49 | Head | Farmer | West Virginia |
| 15 | Betty Jarvis | 45 | Wife | None | West Virginia |
| 16 | Nellie Jarvis | 22 | Daughter | None | West Virginia |
| 17 | Joseph Jarvis | 14 | Son | Farm Laborer | West Virginia |
| 18 | Margaret Jarvis | 9 | Daughter | None | West Virginia |
| 19 | Ralph G. Heck | 32 | Head | Machinery Bury | West Virginia |
| 20 | Anna Heck | 31 | Wife | None | West Virginia |
| 21 | Lorena Heck | 11 | Daughter | None | West Virginia |
| 22 | Kenneth Heck | 9 | Son | None | West Virginia |
| 23 | Charles L. Jarvis | 28 | Head | Sta. Engineer | West Virginia |
| 24 | Nellie Jarvis | 27 | Wife | None | West Virginia |
| 25 | Bettie Jarvis | 5 | Daughter | None | West Virginia |
| 26 | Beatrice Jarvis | 3 | Daughter | None | West Virginia |
| 27 | Kenneth Jarvis | 0 | Son | None | West Virginia |
| 28 | Martha Jarvis | 57 | Mother | None | West Virginia |
| 29 | Virgil Jarvis | 23 | Brother | Laborer | West Virginia |
| 30 | Lucile Jarvis | 16 | Sister | None | West Virginia |
| 31 | Bud Mccoy | 61 | Head | Farmer | West Virginia |
| 32 | Alva Mccoy | 29 | Head | Farmer | West Virginia |
| 33 | Pearl Mccoy | 19 | Wife | None | West Virginia |
| 34 | Bettie Mccoy | 1 | Daughter | None | West Virginia |
| 35 | Viola Mccutcheon | 27 | Boarder | Teacher | West Virginia |
| 36 | Ivan Wood | 24 | Head | Laborer | West Virginia |
| 37 | Edna Wood | 29 | Wife | None | West Virginia |
| 38 | Francis Wood | 3 | Daughter | None | West Virginia |
| 39 | Lula Robinson | 28 | Boarder | Cook | West Virginia |
| 40 | Bettie Robinson | 5 | Boarder | None | West Virginia |
| 41 | Louise Robinson | 2 | Boarder | None | West Virginia |
| 42 | Patrick Duffy | 43 | Head | Farmer | West Virginia |
| 43 | Ida Duffy | 39 | Wife | None | Virginia |
| 44 | Pearl Duffy | 2 | Daughter | None | West Virginia |
| 45 | Herbert Duffy | 1 | Son | None | West Virginia |
| 46 | Adeline Duffy | 57 | Sister | None | West Virginia |
| 47 | Mattie Thrush | 75 | Head | Farmer | Virginia |
| 48 | Rebecca Thrush | 66 | Wife | None | West Virginia |
| 49 | John Mcnamara | 58 | Head | Farmer | West Virginia |
| 50 | Lizzie Mcnamara | 56 | Wife | None | West Virginia |
Related Census Records
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)