WD
William Duffy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Essex, New Jersey
Our Model Tree links this William Duffy across the 1920 and 1930 US Censuses in Essex, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1909), then head of a 9-person household.
Age 21
b. ~1909
Male
Son
Born: New Jersey
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Essex, New Jersey |
| Surname | Duffy |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Additional Details | |
| Occupation | Chauffeur |
| Industry | Transportation |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Chauffeur |
| Township / Ward | Maplewood Twp Pt |
| Est. Birth Year | ~1909 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Elsie Duffy | Spouse | — | 42 | ~1888 |
| Ruth Duffy | Daughter | — | 15 | ~1915 |
| Hazel Duffy | Daughter | — | 8 | ~1922 |
| William Duffy | Son | — | 21 | ~1909 |
| James Conley | Other | — | 26 | ~1904 |
| Doris Duffy | Daughter | — | 1 | ~1929 |
| Ernest Duffy | Son | — | 12 | ~1918 |
| William Duffy | Head | — | 39 | ~1891 |
| Eleanor Duffy | Daughter | — | 18 | ~1912 |
Census Appearances
1920
Essex, New …
Son, age 10
Essex, New Jersey · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Essex, New …
Son, age 21
Essex, New Jersey · implied b. ~1909 — 9 household members
| Surname | Duffy |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | Chauffeur |
| Industry | Transportation |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 William Duffy across 2 US Census years (1920 and 1930) in Essex, New Jersey, using XGBoost record linkage.
Show:
This person
Anchor record
William Duffy
Son · 1930 · age 21 · b. ~1909 · New Jersey
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Sibling
Hazel Duffy
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Duffy
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Duffy
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ernest Duffy
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Duffy
Sibling · 1930 · age 18
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 — Essex, New Jersey
Open full size
1930 US Federal Census — Essex, New Jersey
Page Contents
50 people indexed on this census page (ia:1930:newjerseycensus00reel1331:1150)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Jessie H. Lilley | 27 | Wife | — | New Jersey |
| 52 | Evelyn M. Lilley | 0 | Daughter | — | New Jersey |
| 53 | Charles Stidle | 36 | Head | Inspector | New Jersey |
| 54 | Mary Stidle | 38 | Wife | — | New Jersey |
| 55 | John W. Stidle | 11 | Son | — | New Jersey |
| 56 | Charles Stidle | 5 | Son | — | New Jersey |
| 57 | Louis Franz | 29 | Head | Type-Setter | Germany |
| 58 | Gertrude Franz | 25 | Wife | — | Germany |
| 59 | Arthur Franz | 1 | Son | — | New Jersey |
| 60 | Bjorn H. Bentzen | 43 | Head | Technical Service | Pennsylvania |
| 61 | Blanche M. Bentzen | 36 | Wife | — | Ohio |
| 62 | Enid H. Bentzen | 12 | Daughter | — | Ohio |
| 63 | Edwin H. Bentzen | 8 | Son | — | New Jersey |
| 64 | Christian G. Lidmann | 40 | Head | Foreman | New Jersey |
| 65 | Elizabeth M. Lidmann | 35 | Wife | — | New Jersey |
| 66 | Robert T. Lidmann | 10 | Son | — | New Jersey |
| 67 | Ruth M. Lidmann | 5 | Daughter | — | New Jersey |
| 68 | Peter Froehlich | 56 | Head | Engineer | Germany |
| 69 | Emma Froehlich | 55 | Wife | — | Germany |
| 70 | Ernest H. Froehlich | 20 | Son | Tool Maker | New Jersey |
| 71 | Frederick C. Froehlich | 15 | Son | — | New Jersey |
| 72 | Ernest Gutknecht | 41 | Head | Chauffeur | New York |
| 73 | Laura E. Gutknecht | 41 | Wife | — | New Jersey |
| 74 | Viola E. Gutknecht | 15 | Daughter | Mending Chains | New Jersey |
| 75 | Lillian W. Gutknecht | 4 | Daughter | — | New Jersey |
| 76 | John E. Duffy | 34 | Bro-in-law | Laborer | New Jersey |
| 77 | Ida Duffy | 67 | Mother-in-law | — | New Jersey |
| 78 | William H. Duffy | 39 | Head | Carpenter | New Jersey |
| 79 | Elsie M. Duffy | 42 | Wife | — | New Jersey |
| 80 | William H. Duffy THIS PERSON | 21 | Son | Chauffeur | New Jersey |
| 81 | Eleanor M. Duffy | 18 | Daughter | Mail Clerk | New Jersey |
| 82 | Ruth G. Duffy | 15 | Daughter | Helper-Bindery | New Jersey |
| 83 | Ernest W. Duffy | 12 | Son | — | New Jersey |
| 84 | Hazel H. Duffy | 8 | Daughter | — | New Jersey |
| 85 | Doris M. Duffy | 1 | Daughter | — | New Jersey |
| 86 | James Conley | 26 | Boarder | Tool Drawer | Rhode Island |
| 87 | George Schmidt | 71 | Head | — | New Jersey |
| 88 | Mary Schmidt | 68 | Wife | — | New Jersey |
| 89 | John F. Riley | 57 | Head | — | New Jersey |
| 90 | Gertrude E. Riley | 48 | Wife | — | New Jersey |
| 91 | Gilbert M. Riley | 19 | Son | Clerk-Sales | New Jersey |
| 92 | Gertrude M. Riley | 18 | Daughter | — | New Jersey |
| 93 | Eileen K. Riley | 17 | Daughter | Filing | New Jersey |
| 94 | Herbert E. Coryell | 50 | Head | Carpenter | New Jersey |
| 95 | Lottie A. Coryell | 47 | Wife | — | New Jersey |
| 96 | Raymond R. Coryell | 28 | Son | Salesman-Shoes | New Jersey |
| 97 | Doris I. Coryell | 26 | Daughter | Stenographer | New Jersey |
| 98 | Ruth G. Minthal | 22 | Daughter | — | New Jersey |
| 99 | Ruth L. Coryell | 25 | Daughter-in-law | Substitute Teacher | New York |
| 100 | Millard H. Coryell | 0 | Grandson | — | Rhode Island |
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)