RM
Robert Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Carroll-County, Maryland
Our Model Tree links this Robert Martin across the 1920, 1930 and 1940 US Censuses in Carroll-County, Maryland (XGBoost, ~Confirmed), with identified parents Edward & Edward — first a son (b.~1918), then head of a 5-person household.
Age 22
b. ~1918
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Carroll-County, Maryland |
| Surname | Martin |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Westminster |
| 1935 Residence (County) | Carroll |
| Additional Details | |
| Occupation | Manager |
| Industry | Retail Grocery & Produce |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 156 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Manager |
| Township / Ward | Westminster |
| Est. Birth Year | ~1918 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Edward Martin | Head | — | 39 | ~1901 |
| Bernard Martin | Son | — | 12 | ~1928 |
| Russell Martin | Son | — | 19 | ~1921 |
| Robert Martin | Son | — | 22 | ~1918 |
| Lydia Martin | Spouse | — | 42 | ~1898 |
Census Appearances
1920
Carroll, Maryland
Other, age 2
Carroll, Maryland · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Robert E |
| Relationship to Head | Grandson |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Write | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Carroll, Maryland
Son, age 12
Carroll, Maryland · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Robert E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| 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
Carroll-County, Maryland
Son, age 22
Carroll-County, Maryland · implied b. ~1918 — 5 household members
| Surname | Martin |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Westminster |
| 1935 Residence (County) | Carroll |
| Occupation | Manager |
| Industry | Retail Grocery & Produce |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 156 |
| Highest Grade | Hs 4 |
| 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 Edward Martin (~0.92 confidence) and father Edward Martin (~0.92 confidence) and mother Lydia Martin (~0.92 confidence) and mother Lydia Martin (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Edward Martin
b. ~1901
Source father
● Household
· direct · ~0.92
Father
Edward Martin
b. ~1899
Source father
● Household
· direct · ~0.92
Mother
Lydia Martin
b. ~1897
Source mother
● Household
· direct · ~0.92
Mother
Lydia Martin
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Martin
Son · 1940 · age 22 · b. ~1918 · Maryland
★ You are viewing this record
Sibling
Russell Martin
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Martin
Sibling · 1940 · age 12
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 — Carroll-County, Maryland
Open full size
1940 US Federal Census — Carroll-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01544-00611)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ezra Cohen | 33 | Son | Dealer | Maryland |
| 42 | Melva Cohen | 28 | daughter-in-law | No | Maryland |
| 43 | Edward Martin | 39 | Head | Carpenter | Maryland |
| 44 | Lydia E. Martin | 42 | Wife | No | Maryland |
| 45 | Robert Martin THIS PERSON | 22 | Son | Manager | Maryland |
| 46 | Russell Martin | 19 | Son | Painter | Maryland |
| 47 | Bernard Martin | 12 | Son | — | Maryland |
| 48 | Alfred Bankard | 26 | Head | Edge Setter | Maryland |
| 49 | Pinkie E. Bankard | 25 | Wife | Sharper | Virginia |
| 50 | George Raymond Bankard | 5 | Son | — | Maryland |
| 51 | Barbara Ann Bankard | 4 | daughter | — | Maryland |
| 52 | Minnie Harris | 53 | servant | Housekeeper | Maryland |
| 53 | Nathan H. Haines | 75 | Head | Sweeper | Maryland |
| 54 | Maggie M. Haines | 70 | Wife | No | Maryland |
| 55 | Donald Beaver | 28 | Head | Box Receiver | Maryland |
| 56 | Mary Beaver | 27 | Wife | Operator | Maryland |
| 57 | Eleanor Beaver | 9 | daughter | — | Maryland |
| 58 | Carl Beaver | 7 | Son | — | Maryland |
| 59 | Mary Owings | 45 | Head | Felling | Maryland |
| 60 | Francis E. Arnett | 81 | Head | No | Maryland |
| 61 | Mildred Arnett | 38 | daughter | Stitcher | Maryland |
| 62 | Lillie (Ab) Arnett | 52 | daughter | Chambermaid | Maryland |
| 63 | John Woodyard | 44 | Head | Helper | Maryland |
| 64 | Charlotte Woodyard | 30 | Wife | No | Maryland |
| 65 | Eleanor Woodyard | 12 | daughter | — | Maryland |
| 66 | John Woodyard | 10 | Son | — | Maryland |
| 67 | Irene Woodyard | 9 | daughter | — | Maryland |
| 68 | Eugene Woodyard | 7 | Son | — | Maryland |
| 69 | Catalana Woodyard | 2 | daughter | — | Maryland |
| 70 | John Dorsey | 52 | Head | No | Maryland |
| 71 | Augustus Dorsey | 57 | Wife | No | Maryland |
| 72 | Martin Woodyard | 24 | Son | Helper | Maryland |
| 73 | William Brown | 12 | nephew | Maid | Maryland |
| 74 | Virginia Woodyard | 17 | daughter | — | Maryland |
| 75 | Extra Line | None | — | — | — |
| 76 | John Shirley Smith | 39 | Head | Grader | Maryland |
| 77 | Ruth Elin Smith | 33 | Wife | No | Maryland |
| 78 | Janet Shirley Smith | 7 | daughter | — | Maryland |
| 79 | Ruth Claire Smith | 6 | daughter | — | Maryland |
| 80 | Extra Line | None | — | — | — |
Pedigree Summary
Robert + 2 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)