RC
Robert Chapman — 1920 US Census Record
Model Tree available1920 United States Federal Census · Mason, Washington
Our Model Tree links this Robert Chapman across the 1900, 1910 and 1920 US Censuses in Mason, Washington (XGBoost, ~Confirmed), with identified parents Frank & Alex — first a son (b.~1870), then head of a 4-person household.
Age 50
b. ~1870
Male
Son
Born: Washington
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Mason, Washington |
| Surname | Chapman |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Missouri |
| Additional Details | |
| Occupation | Laborer |
| Industry | Commercial |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Laborer |
| Township / Ward | Shelton Town |
| Est. Birth Year | ~1870 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Chapman | Son | — | 50 | ~1870 |
| Sarah Chapman | Spouse | — | 74 | ~1846 |
| Nora Chapman | Daughter | — | 38 | ~1882 |
| Frank Chapman | Head | — | 89 | ~1831 |
Census Appearances
1900
Mason, Washington
Son, age 30
Mason, Washington · implied b. ~1870 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Washington |
| Birth Month | Dec |
| Birth Year | 1870 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Missouri |
| Occupation | Oysterman |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1910
Mason, Washington
Son, age 37
Mason, Washington · implied b. ~1873 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Missouri |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1920
Mason, Washington
Son, age 50
Mason, Washington · implied b. ~1870 — 4 household members
| Surname | Chapman |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Missouri |
| Occupation | Laborer |
| Industry | Commercial |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
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 Robert Chapman across 3 US Census years (1900, 1910 and 1920) in Mason, Washington, using XGBoost record linkage. Identified parents: father Frank Chapman (~0.92 confidence) and father Alex Chapman (~0.92 confidence) and father Alexander Chapman (~0.92 confidence) and mother Sarah Chapman (~0.92 confidence) and mother Lucy Chapman (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Chapman
b. ~1831
Source father
● Household
· direct · ~0.92
Father
Alex Chapman
b. ~1833
Source father
● Household
· direct · ~0.92
Father
Alexander Chapman
b. ~1840
Source father
● Household
· direct · ~0.92
Mother
Sarah Chapman
b. ~1846
Source mother
● Household
· direct · ~0.92
Mother
Lucy Chapman
b. ~1847
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Chapman
Son · 1920 · age 50 · b. ~1870 · Washington
★ You are viewing this record
Sibling
Nora Chapman
Sibling · 1920 · age 38
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 — Mason, Washington
Open full size
1920 US Federal Census — Mason, Washington
Page Contents
44 people indexed on this census page (ia:1920:14thcensusofpopu1934unit:0103)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Benjamin Snider | 74 | Head | — | Canada |
| 52 | Mary Snider | 47 | Daughter | — | Wisconsin |
| 53 | Nellie J. Walsh | 63 | Step-daughter | — | Wisconsin |
| 54 | Earl F. Kneeland | 48 | Head | Farmer | Maine |
| 55 | Winifred M. Kneeland | 43 | Wife | — | Iowa |
| 56 | Cyril G. Kneeland | 19 | Son | — | Washington |
| 57 | Louis E. Matthew | 63 | Head | Iron-Worker | Canada |
| 58 | Mary O'Leary | 47 | Head | For Laundry | Michigan |
| 59 | Peter O'Leary | 17 | Son | — | Washington |
| 60 | Mary W. Hughes | 73 | Head | — | Ohio |
| 61 | Margaret E. Chapel | 46 | Daughter | — | Indiana |
| 62 | O. M. Johnson | 48 | Head | Laborer | Norway |
| 63 | Mathilda Johnson | 36 | Wife | — | Wisconsin |
| 64 | Rayford Johnson | 17 | Son | Laborer | Wisconsin |
| 65 | Ila Johnson | 15 | Daughter | — | Washington |
| 66 | Emma Johnson | 11 | Daughter | — | Washington |
| 67 | John Kubik | 59 | Head | Painter | Bohemia |
| 68 | Theresa Kubik | 64 | Wife | — | Norway |
| 69 | Sarah J. Briggs | 65 | Head | — | Ohio |
| 70 | George F. Phelps | 27 | Head | Truck Driver | Michigan |
| 71 | Dorothy Phelps | 19 | Wife | — | Germany |
| 72 | George F. Parks | 23 | Head | Fireman | Washington |
| 73 | Pearl Parks | 21 | Wife | — | Kansas |
| 74 | Mary Jane Parks | 0 | Daughter | — | Washington |
| 75 | Marie Ludlow | 18 | Boarder | Clerk | Kansas |
| 76 | Edward Norman | 60 | Head | — | Canada |
| 77 | K. Kamocha | 32 | Head | Laborer | Japan |
| 78 | Mitsuye Kamocha | 24 | Wife | — | Japan |
| 79 | T. Hayashi | 38 | Boarder | Laborer | Japan |
| 80 | Mitsuye Hayashi | 24 | Boarder | — | Japan |
| 81 | Kayo Takumi | 26 | Boarder | — | Japan |
| 82 | Frank Chapman | 89 | Head | — | Kentucky |
| 83 | Sarah Chapman | 74 | Wife | — | Ohio |
| 84 | Robert Chapman THIS PERSON | 50 | Son | Laborer | Washington |
| 85 | Nora Chapman | 38 | Daughter | — | Washington |
| 86 | Andrew Johnson | 48 | Head | Laborer | Finland |
| 87 | Frank Wandell | 44 | Head | Engineer | Oregon |
| 88 | Dora Wandell | 35 | Wife | — | Washington |
| 89 | Marion Wandell | 13 | Daughter | — | Washington |
| 90 | Myrtle E. Wandell | 2 | Daughter | — | Washington |
| 91 | Gladys Hunter | 28 | Boarder | Clerk | Iowa |
| 92 | Esther Wise | 18 | Boarder | — | Washington |
| 93 | Andrew Malson | 30 | Boarder | Laborer | Norway |
| 94 | Doris Hovedale | 20 | Boarder | — | Washington |
Pedigree Summary
Robert + 1 sibling
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)