RM
Robert Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Robert Martin across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1904), then head of a 2-person household.
Age 36
b. ~1904
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Martin |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | City Government |
| Class of Worker | GW |
| Hours Worked | 15 |
| Income (1939) | 420 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Truck Driver |
| Township / Ward | Baltimore City |
| 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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Sarah Martin | Head | — | 73 | ~1867 |
| Robert Martin | Son | — | 36 | ~1904 |
Census Appearances
1920
Baltimore, Maryland
Son, age 17
Baltimore, Maryland · implied b. ~1903 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Chauffeur |
| Industry | Private Family |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 26
Baltimore, Maryland · implied b. ~1904 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Robert L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Maryland |
| Age at First Marriage | 26 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Chauffeur |
| Industry | Transfer Truck |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Son, age 36
Baltimore-City-County, Maryland · implied b. ~1904 — 2 household members
| Surname | Martin |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Truck Driver |
| Industry | City Government |
| Class of Worker | GW |
| Hours Worked | 15 |
| Income (1939) | 420 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| 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 Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Martin (~0.92 confidence) and father John Martin (~0.92 confidence) and mother Sally Martin (~0.92 confidence) and mother Sarah Martin (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Martin
b. ~1862
Source father
● Household
· direct · ~0.92
Father
John Martin
b. ~1862
Source father
● Household
· direct · ~0.92
Mother
Sally Martin
b. ~1867
Source mother
● Household
· direct · ~0.92
Mother
Sarah Martin
b. ~1867
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Martin
Son · 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 — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01535-00355)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William S Busch | 56 | Head | Laborer | Maryland |
| 2 | Annie R Busch | 49 | Wife | — | England |
| 3 | William S Busch | 19 | Son | Attendant | Maryland |
| 4 | Catherine A Busch | 17 | Daughter | Sales Girl | Maryland |
| 5 | John T Busch | 13 | Son | — | Maryland |
| 6 | Helen L Kuhn | 20 | Lodger | Polisher | Maryland |
| 7 | Margaret E Carnes | 45 | Wife | — | Maryland |
| 8 | William E Carnes | 45 | Head | Attendant | Maryland |
| 9 | Elmer J Carnes | 15 | Son | — | Maryland |
| 10 | Allen R Cole | 36 | Head | Laborer | Maryland |
| 11 | Leona M Cole | 32 | Wife | — | Maryland |
| 12 | Emerald F Cole | 15 | Daughter | New Worker | Maryland |
| 13 | Hilda R Cole | 11 | Daughter | — | Maryland |
| 14 | Dona D Cole | 5 | Daughter | — | Maryland |
| 15 | Elizabeth Schuch | 69 | Lodger | — | Germany |
| 16 | Milford S Cole | 25 | Cousin | Assembly Man | Maryland |
| 17 | Russell R Brooks | 32 | Head | Labor | Maryland |
| 18 | Stella Brooks | 29 | Wife | — | Maryland |
| 19 | Margaret B Brooks | 10 | Daughter | — | Maryland |
| 20 | Charles M Brooks | 8 | Son | — | Maryland |
| 21 | Donald H Brooks | 7 | Son | — | Maryland |
| 22 | Edward H Brooks | 2 | Son | — | Maryland |
| 23 | Elizabeth Brandt | 50 | Head | — | Maryland |
| 24 | Gordon S Brown | 63 | Lodger | Pattern Maker | Virginia |
| 25 | Katherine Faye | 40 | Lodger | Packer | Maryland |
| 26 | William R Cook | 37 | Head | Own Business | Maryland |
| 27 | William R Cook | 11 | Son | — | Maryland |
| 28 | Junior W Cook | 8 | Son | — | Maryland |
| 29 | Anthony Cook | 5 | Son | — | Maryland |
| 30 | William Wheelton | 19 | Lodger | Helper | Maryland |
| 31 | Arlett F Busker | 17 | Lodger | — | Maryland |
| 32 | Arthur R Busker | 3 | Lodger | — | Maryland |
| 33 | Sarah E Martin | 73 | Head | — | Maryland |
| 34 | Robert Martin THIS PERSON | 36 | Son | Truck Driver | Maryland |
| 35 | Leon A Sank | 23 | Head | — | Maryland |
| 36 | William E Sank | 26 | Son | Clerk | Maryland |
| 37 | Mamie H Sank | 23 | Daughter | — | Maryland |
| 38 | William Thos Wooten | 36 | Head | Tavern | Maryland |
| 39 | Ethel A Wooten | 34 | Wife | Machine Operator | Maryland |
| 40 | Charles F Haffner | 39 | Head | Tester | Maryland |
Pedigree Summary
Robert
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)