WD
William Duffy — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Iowa, Iowa
Our Model Tree links this William Duffy across the 1910 and 1920 US Censuses in Iowa, Iowa (XGBoost, ~Confirmed) — first a son (b.~1898), then head of a 11-person household.
Age 22
b. ~1898
Male
Son
Born: Iowa
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Iowa, Iowa |
| Surname | Duffy |
| Given Name | William P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Additional Details | |
| Occupation | Farm Laborer |
| Industry | Home farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farm Laborer |
| Township / Ward | York Township |
| Est. Birth Year | ~1898 |
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 1920 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Martin Duffy | Son | — | 17 | ~1903 |
| Leroy Duffy | Son | — | 13 | ~1907 |
| William Duffy | Son | — | 22 | ~1898 |
| Michael Duffy | Head | — | 54 | ~1866 |
| Raymond Duffy | Son | — | 11 | ~1909 |
| Mary Duffy | Spouse | — | 48 | ~1872 |
| Gertrude Duffy | Daughter | — | 19 | ~1901 |
| Lavona Duffy | Daughter | — | 8 | ~1912 |
| Joseph Duffy | Son | — | 24 | ~1896 |
| Edward Duffy | Son | — | 6 | ~1914 |
| Silvester Duffy | Son | — | 15 | ~1905 |
Census Appearances
1910
Iowa, Iowa
Son, age 12
Iowa, Iowa · implied b. ~1898 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Willie |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1920
Iowa, Iowa
Son, age 22
Iowa, Iowa · implied b. ~1898 — 11 household members
| Surname | Duffy |
| Given Name | William P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Farm Laborer |
| Industry | Home farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| 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 William Duffy across 2 US Census years (1910 and 1920) in Iowa, Iowa, using XGBoost record linkage.
Show:
This person
Anchor record
William Duffy
Son · 1920 · age 22 · b. ~1898 · Iowa
★ You are viewing this record
Sibling
Raymond Duffy
Sibling · 1920 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Duffy
Sibling · 1920 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lavona Duffy
Sibling · 1920 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Duffy
Sibling · 1920 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leroy Duffy
Sibling · 1920 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Silvester Duffy
Sibling · 1920 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martin Duffy
Sibling · 1920 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Duffy
Sibling · 1920 · age 19
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
1920 US Federal Census — Iowa, Iowa
Open full size
1920 US Federal Census — Iowa, Iowa
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu494unit:0231)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Catherine | 55 | Wife | — | Iowa |
| 52 | Peter | 21 | Son | Farm Laborer | Iowa |
| 53 | Michael | 19 | Son | — | Iowa |
| 54 | Mary | 17 | Daughter | — | Iowa |
| 55 | Joseph | 15 | Son | — | Iowa |
| 56 | Hannah | 13 | Daughter | — | Iowa |
| 57 | John Smeester | 44 | Head | Farmer | Germany |
| 58 | Hattie Smeester | 31 | Wife | — | Iowa |
| 59 | Ida Smeester | 12 | Daughter | — | Iowa |
| 60 | Alma Smeester | 11 | Daughter | — | Iowa |
| 61 | Albert Smeester | 9 | Son | — | Iowa |
| 62 | John H. Driscoll | 32 | Head | Farmer | Iowa |
| 63 | Julia A. Driscoll | 24 | Wife | — | Iowa |
| 64 | Mary D. Driscoll | 4 | Daughter | — | Iowa |
| 65 | John Hoy | 46 | Head | Farmer | Iowa |
| 66 | Catherine Hoy | 84 | Mother | — | Ireland |
| 67 | John Birmingham | 42 | Head | Farmer | Iowa |
| 68 | Agnes Birmingham | 34 | Wife | — | Minnesota |
| 69 | Mary E. Birmingham | 7 | Daughter | — | Iowa |
| 70 | Edward Birmingham | 6 | Son | — | Iowa |
| 71 | Michael Spratt | 38 | Head | Farmer | Iowa |
| 72 | Maggie Spratt | 39 | Wife | — | Iowa |
| 73 | Martin Spratt | 14 | Son | Farm Laborer | Iowa |
| 74 | Mamie Spratt | 12 | Daughter | — | Iowa |
| 75 | Clara Spratt | 10 | Daughter | — | Iowa |
| 76 | Helen Spratt | 5 | Daughter | — | Iowa |
| 77 | Gerald Spratt | 4 | Son | — | Iowa |
| 78 | Agnes Spratt | 1 | Daughter | — | Iowa |
| 79 | Patrick P. Griffin | 39 | Head | Farmer | Iowa |
| 80 | Catherine Griffin | 45 | Wife | — | Iowa |
| 81 | Edna Griffin | 14 | Daughter | — | Iowa |
| 82 | Irma Griffin | 12 | Daughter | — | Iowa |
| 83 | Julia Griffin | 10 | Daughter | — | Iowa |
| 84 | Nellie Griffin | 8 | Daughter | — | Iowa |
| 85 | Velma Griffin | 5 | Daughter | — | Iowa |
| 86 | Michael J. Duffy | 54 | Head | Farmer | Iowa |
| 87 | Mary Duffy | 48 | Wife | — | Iowa |
| 88 | Joseph Duffy | 24 | Son | Farm Laborer | Iowa |
| 89 | William P. Duffy THIS PERSON | 22 | Son | Farm Laborer | Iowa |
| 90 | Gertrude Duffy | 19 | Daughter | — | Iowa |
| 91 | Martin Duffy | 17 | Son | Farm Laborer | Iowa |
| 92 | Silvester Duffy | 15 | Son | Farm Laborer | Iowa |
| 93 | Leroy Duffy | 13 | Son | — | Iowa |
| 94 | Raymond Duffy | 11 | Son | — | Iowa |
| 95 | Lavona Duffy | 8 | Daughter | — | Iowa |
| 96 | Edward Duffy | 6 | Son | — | Iowa |
| 97 | Ike Griffin | 33 | Head | Farmer | Iowa |
| 98 | Margaret Griffin | 36 | Wife | — | Iowa |
| 99 | John F. Griffin | 1 | Son | — | Iowa |
| 100 | Thomas F. Donohue | 50 | Head | Farmer | Iowa |
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)