RH
Robert Hammond — 1940 US Census Record
Model Tree available1940 United States Federal Census · Washington-County, Maryland
Our Model Tree links this Robert Hammond across the 1920, 1930 and 1940 US Censuses in Washington-County, Maryland (XGBoost, ~Confirmed), with identified parents Archibald & Mary — first a head (b.~1904), then head of a 4-person household.
Age 36
b. ~1904
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Maryland |
| Surname | Hammond |
| Given Name | Robert B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | """R""" |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Occupation | Farming |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 466 |
| Highest Grade | No 8 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Farming |
| Township / Ward | Hagerstown |
| Est. Birth Year | ~1904 |
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 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Walter Hammond | Son | — | 11 | ~1929 |
| Hedwig Hammond | Spouse | — | 36 | ~1904 |
| Robert Hammond | Head | — | 36 | ~1904 |
| Robert Hammond | Son | — | 12 | ~1928 |
Census Appearances
1920
Washington, Maryland
Son, age 16
Washington, Maryland · implied b. ~1904 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hammond |
| Given Name | Robert B. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Washington, Maryland
Head, age 27
Washington, Maryland · implied b. ~1903 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hammond |
| Given Name | Robert S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 23 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Washington-County, Maryland
Head, age 36
Washington-County, Maryland · implied b. ~1904 — 4 household members
| Surname | Hammond |
| Given Name | Robert B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | """R""" |
| 1935 Residence (County) | Washington |
| Occupation | Farming |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 466 |
| Highest Grade | No 8 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Hammond across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Archibald Hammond (~0.92 confidence) and mother Mary Hammond (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Archibald Hammond
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Mary Hammond
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Hammond
Head · 1940 · age 36 · b. ~1904 · Maryland
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Washington-County, Maryland
Open full size
1940 US Federal Census — Washington-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01561-00776)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joan A Smith | 1 | Daughter | — | Maryland |
| 2 | Harry J. Byrum | 36 | Head | Taxi Driver | Maryland |
| 3 | Ruth C. Byrum | 35 | Wife | — | Maryland |
| 4 | Preston J. Armstrong | 32 | Head | Sheet Metal Worker | Maryland |
| 5 | Edith E. Armstrong | 25 | Wife | Presser | Maryland |
| 6 | Robert B. Hammond THIS PERSON | 36 | Head | Farming | Maryland |
| 7 | Hedwig L. Hammond | 36 | Wife | — | Germany |
| 8 | Robert B. Hammond | 12 | Son | — | Illinois |
| 9 | Walter L. Hammond | 11 | Son | — | Maryland |
| 10 | Grace G. Koontz | 33 | Head | — | Pennsylvania |
| 11 | Doris M. E. Koontz | 14 | Daughter | — | Maryland |
| 12 | Ellen Bowers | 78 | Grandmother | — | Maryland |
| 13 | Carl Keller Nigh | 44 | Head | Truck Driver | Maryland |
| 14 | Theodosia D. Nigh | 44 | Wife | — | Maryland |
| 15 | Kenneth Nigh | 20 | Son | Pin Boy | Maryland |
| 16 | Charles R. Nigh | 19 | Son | Assistant Manager | Maryland |
| 17 | Harold R. Nigh | 16 | Son | — | Maryland |
| 18 | Donald L. Nigh | 12 | Son | — | Maryland |
| 19 | David F. Nigh | 7 | Son | — | Maryland |
| 20 | Betty L. Nigh | 5 | Daughter | — | Maryland |
| 21 | Gerald Nigh | 3 | Son | — | Maryland |
| 22 | Rowland L. Morgan | 30 | Head | Machinist | Maryland |
| 23 | J. Etta Morgan | 25 | Wife | Retail Saleslady | Maryland |
| 24 | Donald F. Morgan | 8 | Son | — | Maryland |
| 25 | Dwight L. Morgan | 3 | Son | — | Maryland |
| 26 | Perry E. Osborne | 33 | Head | Moulder | Maryland |
| 27 | Shirley H. Osborne | 36 | Wife | — | Maryland |
| 28 | Jack E. Osborne | 11 | Son | — | Maryland |
| 29 | Ida B. Osborne | 62 | Head | — | Maryland |
| 30 | Elwin L. Osborne | 31 | Son | Trucker | Maryland |
| 31 | Adelaide P. Osborne | 21 | Daughter | Assembler | Maryland |
| 32 | Howard L. Griffith | 29 | Head | Sheet Metal Worker | Maryland |
| 33 | Helen J. Griffith | 26 | Wife | — | Maryland |
| 34 | Virginia L. Griffith | 6 | Daughter | — | Maryland |
| 35 | Howard E. Griffith | 5 | Son | — | Maryland |
| 36 | Pearl Griffith | 2 | Daughter | — | Maryland |
| 37 | Lloyd S. Griffith | 0 | Son | — | Maryland |
| 38 | Wilbur W. Stouffer | 32 | Head | Machine Operator | Maryland |
| 39 | Gloria M. Stouffer | 29 | Wife | — | Maryland |
| 40 | Wilbur Jr. Stouffer | 9 | Son | — | Maryland |
Pedigree Summary
Robert
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)