RH
Robert Hoffman — 1940 US Census Record
Model Tree available1940 United States Federal Census · Harford-County, Maryland
Our Model Tree links this Robert Hoffman across the 1920, 1930 and 1940 US Censuses in Harford-County, Maryland (XGBoost, ~Confirmed), with identified parents Albert & Alfred — first a son (b.~1916), then head of a 9-person household.
Age 24
b. ~1916
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Harford-County, Maryland |
| Surname | Hoffman |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Calvary |
| 1935 Residence (County) | Harford |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 88 |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Laborer |
| Township / Ward | Calvary |
| Est. Birth Year | ~1916 |
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 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Hoffman | Son | — | 24 | ~1916 |
| Dora Hoffman | Daughter | — | 24 | ~1916 |
| Ruth Hoffman | Daughter | — | 22 | ~1918 |
| Isabel Hoffman | Daughter | — | 19 | ~1921 |
| Effie Hoffman | Spouse | — | 50 | ~1890 |
| Betty Hoffman | Daughter | — | 9 | ~1931 |
| Patricia Hoffman | Other | — | 3 | ~1937 |
| William Hoffman | Son | — | 15 | ~1925 |
| Albert Hoffman | Head | — | 47 | ~1893 |
Census Appearances
1920
Harford, Maryland
Son, age 4
Harford, Maryland · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hoffman |
| Given Name | Robert P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Harford, Maryland
Son, age 14
Harford, Maryland · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hoffman |
| Given Name | Robert P |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Harford-County, Maryland
Son, age 24
Harford-County, Maryland · implied b. ~1916 — 9 household members
| Surname | Hoffman |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Calvary |
| 1935 Residence (County) | Harford |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 88 |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| 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 Hoffman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Albert Hoffman (~0.92 confidence) and father Alfred Hoffman (~0.92 confidence) and mother Effie Hoffman (~0.92 confidence) and father Albert Hoffman (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Albert Hoffman
b. ~1887
Source father
● Household
· direct · ~0.92
Father
Alfred Hoffman
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Effie Hoffman
b. ~1892
Source mother
● Household
· direct · ~0.92
Father
Albert Hoffman
b. ~1893
Source father
● Household
· direct · ~0.92
This person
Anchor record
Robert Hoffman
Son · 1940 · age 24 · b. ~1916 · Maryland
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Sibling
Dora Hoffman
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Isabel Hoffman
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Hoffman
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Hoffman
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Hoffman
Sibling · 1940 · age 9
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
1940 US Federal Census — Harford-County, Maryland
Open full size
1940 US Federal Census — Harford-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01551-00552)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Georgia Brady | 28 | Wife | — | Virginia |
| 2 | George Jr. Brady | 7 | Son | — | Virginia |
| 3 | Doris Lee Brady | 4 | Son | — | Maryland |
| 4 | Roy E. Parker | 36 | Head | Manager | Virginia |
| 5 | Annie M. Parker | 31 | Wife | — | Virginia |
| 6 | Marian Parker | 12 | Daughter | — | Maryland |
| 7 | Roy E. Jr. Parker | 10 | Son | — | Virginia |
| 8 | Albert W. Dixon | 64 | Head | Merchant | Maryland |
| 9 | Isabelle D. Dixon | 54 | Wife | Merchant | Maryland |
| 10 | Nancy Dixon | 25 | Daughter | — | Maryland |
| 11 | Russell Bagan | 31 | Head | Manager | Maryland |
| 12 | Ruth Bagan | 28 | Wife | — | Virginia |
| 13 | Albert Bagan | 11 | Son | — | Maryland |
| 14 | Albert P. Hoffman | 47 | Head | Farmer | Maryland |
| 15 | Effie Hoffman | 50 | Wife | — | Maryland |
| 16 | Dora Hoffman | 24 | Daughter | Seamstress | Maryland |
| 17 | Robert Hoffman THIS PERSON | 24 | Son | Laborer | Maryland |
| 18 | Ruth Hoffman | 22 | Daughter | — | Maryland |
| 19 | Isabel Hoffman | 19 | Daughter | Seamstress | Maryland |
| 20 | William Hoffman | 15 | Son | Laborer | Maryland |
| 21 | Betty Hoffman | 9 | Daughter | — | Maryland |
| 22 | Patricia Hoffman | 3 | Granddaughter | — | Maryland |
| 23 | Mary A. Shantz | 73 | Head | Old Age Pension | Maryland |
| 24 | Charles W. Hanley | 75 | Head | Retired Farmer | Maryland |
| 25 | Aurelia Hanley | 72 | Wife | — | Maryland |
| 26 | James Plummer | 57 | Head | Carpenter | Virginia |
| 27 | Laura Plummer | 32 | Wife | — | Virginia |
| 28 | Walter Plummer | 27 | Son | Carpenter Helper | West Virginia |
| 29 | Ruth Plummer | 16 | Daughter | — | Virginia |
| 30 | Evelyn Plummer | 14 | Daughter | — | Virginia |
| 31 | Robert Plummer | 13 | Son | — | West Virginia |
| 32 | Albert Plummer | 33 | Son | Carpenter Helper | Tennessee |
| 33 | Mary Plummer | 29 | Daughter-in-law | — | Virginia |
| 34 | Margaret Plummer | 8 | Granddaughter | — | Maryland |
| 35 | James Jr. Plummer | 6 | Grandson | — | Maryland |
| 36 | Mary Jane Plummer | 4 | Granddaughter | — | Maryland |
| 37 | Lillie Trupe | 30 | Lodger | — | Maryland |
| 38 | Robert R. Trupe | 6 | Lodger | — | Maryland |
| 39 | A. Linn Drago | 63 | Head | Farm Manager | Maryland |
| 40 | Rebecca Drago | 66 | Wife | — | Maryland |
Related Census Records
Pedigree Summary
Robert + 5 siblings
Gen 1 · 4 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)