DP
David Parker — 1940 US Census Record
Model Tree available1940 United States Federal Census · Calvert-County, Maryland
Our Model Tree links this David Parker across the 1920, 1930 and 1940 US Censuses in Calvert-County, Maryland (XGBoost, ~Confirmed), with identified parents Susan — first a head (b.~1885), then head of a 5-person household.
Age 55
b. ~1885
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Calvert-County, Maryland |
| Surname | Parker |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 1 Solomon Island |
| 1935 Residence (County) | Calvert |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | No 0 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Farmer |
| Township / Ward | Election District 1 Solomon Island |
| Est. Birth Year | ~1885 |
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 David | Age | Birth yr |
|---|---|---|---|---|
| David Parker | Head | — | 55 | ~1885 |
| Robert Parker | Son | — | 17 | ~1923 |
| Edward Parker | Son | — | 8 | ~1932 |
| Gertie Parker | Daughter | — | 14 | ~1926 |
| Sarah Parker | Spouse | — | 35 | ~1905 |
Census Appearances
1920
Calvert, Maryland
Son, age 35
Calvert, Maryland · implied b. ~1885 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Parker |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Calvert, Maryland
Head, age 45
Calvert, Maryland · implied b. ~1885 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Parker |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 37 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | VVVV |
| Can Read/Write | No |
| Home Owned/Rented | O |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Calvert-County, Maryland
Head, age 55
Calvert-County, Maryland · implied b. ~1885 — 5 household members
| Surname | Parker |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 1 Solomon Island |
| 1935 Residence (County) | Calvert |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | No 0 |
| 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 David Parker across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Susan Parker (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Susan Parker
b. ~1840
Source mother
● Household
· direct · ~0.92
This person
Anchor record
David Parker
Head · 1940 · age 55 · b. ~1885 · 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 — Calvert-County, Maryland
Open full size
1940 US Federal Census — Calvert-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01543-00048)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Raymond Matterson | 25 | Son | Laborer | Rhode Island |
| 2 | Josephus Parker | 34 | Head | Laborer | Maryland |
| 3 | Irene Parker | 19 | Wife | — | Maryland |
| 4 | Thomas Parker | 4 | Son | — | Maryland |
| 5 | William Parker | 1 | Son | — | Maryland |
| 6 | John C. Wallace | 58 | Head | Farmer | Maryland |
| 7 | Hattie Wallace | 46 | Wife | — | Maryland |
| 8 | Hattie Wallace | 17 | Daughter | — | Maryland |
| 9 | Thelma Wallace | 12 | Daughter | — | Maryland |
| 10 | Carrie Wallace | 10 | Daughter | — | Maryland |
| 11 | Cephus S. Wallace | 16 | Son | — | Maryland |
| 12 | Calvin Wallace | 6 | Son | — | Maryland |
| 13 | Elphonso Commodore | 43 | Head | Carpenter | Maryland |
| 14 | Ronnie Commodore | 33 | Wife | — | Maryland |
| 15 | John Commodore | 9 | Son | — | Maryland |
| 16 | Dewey Commodore | 38 | Head | Laborer | Maryland |
| 17 | Ella Commodore | 42 | Wife | — | Maryland |
| 18 | Archie Commodore | 25 | Son | Laborer | Maryland |
| 19 | David Parker THIS PERSON | 55 | Head | Farmer | Maryland |
| 20 | Sarah Parker | 35 | Wife | — | Maryland |
| 21 | Robert Parker | 17 | Son | Helper | Maryland |
| 22 | Gertie Parker | 14 | Daughter | — | Maryland |
| 23 | Edward Parker | 8 | Son | — | Maryland |
| 24 | Suddie Commodore | 67 | Head | — | Maryland |
| 25 | John Commodore | 34 | Son | Laborer | Maryland |
| 26 | Pattie Commodore | 29 | Son | — | Maryland |
| 27 | Mary F. Commodore | 42 | Daughter | — | Maryland |
| 28 | Willie Commodore | 50 | Son | Laborer | Maryland |
| 29 | Liza E. Commodore | 46 | Daughter | — | Maryland |
| 30 | Jr. Willie Commodore | 13 | Grand-son | — | Maryland |
| 31 | Arthur Commodore | 11 | Grand-son | — | Maryland |
| 32 | James Commodore | 70 | Head | Laborer | Maryland |
| 33 | Sarah Commodore | 64 | Wife | — | Maryland |
| 34 | Cornelius Hanard | 63 | Head | Laborer | Maryland |
| 35 | Julia Hanard | 58 | Wife | — | Maryland |
| 36 | Henry Buckman | 48 | Head | Farmer | Maryland |
| 37 | Katherine Buckman | 47 | Wife | — | Maryland |
| 38 | Leroy Buckman | 16 | Son | Laborer | Maryland |
| 39 | Charles Kirby | 69 | Head | — | Virginia |
| 40 | Louise Kirby | 64 | Wife | — | Virginia |
Pedigree Summary
David
Gen 1 · 1 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)