CM
Clara Martin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Maryland
Our Model Tree links this Clara Martin across the 1930 and 1940 US Censuses in Montgomery-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 10-person household.
Age 19
b. ~1921
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Maryland |
| Surname | Martin |
| Given Name | Clara |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Elect Dist 4 Rockville |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Hours Worked | 7 |
| Income (1939) | 0 |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Elect Dist 4 Rockville |
| Est. Birth Year | ~1921 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Clara | Age | Birth yr |
|---|---|---|---|---|
| Arnold Martin | Son | — | 2 | ~1938 |
| Clara Martin | Daughter | — | 19 | ~1921 |
| Virginia Martin | Daughter | — | 15 | ~1925 |
| Clem Martin | Head | — | 60 | ~1880 |
| Thomas Martin | Son | — | 9 | ~1931 |
| Mabel Martin | Daughter | — | 13 | ~1927 |
| Leon Martin | Son | — | 21 | ~1919 |
| Clem Martin | Son | — | 11 | ~1929 |
| Jamie Martin | Spouse | — | 43 | ~1897 |
| Bernice Martin | Daughter | — | 17 | ~1923 |
Census Appearances
1930
Montgomery, Maryland
Daughter, age 9
Montgomery, Maryland · implied b. ~1921 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Clara L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Montgomery-County, Maryland
Daughter, age 19
Montgomery-County, Maryland · implied b. ~1921 — 10 household members
| Surname | Martin |
| Given Name | Clara |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Elect Dist 4 Rockville |
| 1935 Residence (County) | Montgomery |
| Hours Worked | 7 |
| Income (1939) | 0 |
| Highest Grade | No 2 |
| 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 Clara Martin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Clara Martin
Daughter · 1940 · age 19 · b. ~1921 · Maryland
★ You are viewing this record
Sibling
Thomas Martin
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Martin
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mabel Martin
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leon Martin
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice Martin
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arnold Martin
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clem Martin
Sibling · 1940 · age 11
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 — Montgomery-County, Maryland
Open full size
1940 US Federal Census — Montgomery-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01553-00315)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Percy Eleanor Johnson | 33 | Wife | Maid | Maryland |
| 2 | Daisy Webster | 49 | Head | Housekeeper | Maryland |
| 3 | Madeline Morson | 24 | Daughter | — | Virginia |
| 4 | Barbara L Morson | 4 | Gr daughter | — | Wash DC |
| 5 | Caroline Morson | 2 | Gr daughter | — | Wash DC |
| 6 | Arthur Johnson | 55 | Head | House Man | Maryland |
| 7 | Nora Johnson | 52 | Wife | Maid | Maryland |
| 8 | Samuel P Smith | 61 | Head | House Man | Maryland |
| 9 | Evelyn Smith | 61 | Wife | Laundry | Maryland |
| 10 | Linwood R Jackson | 32 | Head | Mechanic Helper | Maryland |
| 11 | Sarah L Jackson | 32 | Wife | — | Virginia |
| 12 | Reed Jackson | 14 | Son | — | Virginia |
| 13 | Russell Jackson | 10 | Son | — | Maryland |
| 14 | Theodore Jackson | 9 | Son | — | Maryland |
| 15 | Edith Jackson | 6 | Daughter | — | Maryland |
| 16 | Wm E Wood | 40 | Head | Laborer | Maryland |
| 17 | Minnie Wood | 30 | Wife | — | Virginia |
| 18 | Wm D Wood | 14 | Son | — | Maryland |
| 19 | Lucy T Carroll | 45 | Roomer | — | Maryland |
| 20 | Mary X Carroll | 75 | Roomer | — | Maryland |
| 21 | Elizabeth Hartman | 51 | Roomer | Maid | Maryland |
| 22 | Clem E Martin | 60 | Head | Clerk | Wash DC |
| 23 | Jamie Martin | 43 | Wife | — | Virginia |
| 24 | Leon Martin | 21 | Son | — | Wash DC |
| 25 | Clara Martin THIS PERSON | 19 | Daughter | — | Maryland |
| 26 | Bernice Martin | 17 | Daughter | House Maid | Maryland |
| 27 | Virginia Martin | 15 | Daughter | — | Maryland |
| 28 | Mabel Martin | 13 | Daughter | — | Maryland |
| 29 | Clem Jr Martin | 11 | Son | — | Maryland |
| 30 | Thomas Percy Martin | 9 | Son | — | Maryland |
| 31 | Arnold Martin | 2 | Son | — | Maryland |
| 32 | Elby Johnson | 65 | Head | Janitor | Maryland |
| 33 | Zenith Johnson | 62 | Wife | — | Wash DC |
| 34 | Richard Litchfield | 52 | Head | Laborer | Virginia |
| 35 | Lottie Litchfield | 52 | Wife | Cook | Virginia |
| 36 | Mosselle Litchfield | 11 | Daughter | — | Maryland |
| 37 | Pauline Litchfield | 9 | Daughter | — | Maryland |
| 38 | Emansa Litchfield | 18 | Son | — | Maryland |
| 39 | Louis Litchfield | 18 | Son | Dish Washer | Maryland |
| 40 | Lowell Litchfield | 20 | Son | Cook | Maryland |
Related Census Records
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)