JD
James Douglas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · District-Of-Columbia-County, District of Columbia
Our Model Tree links this James Douglas across the 1930 and 1940 US Censuses in District-Of-Columbia-County, District of Columbia (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 10-person household.
Age 21
b. ~1919
Male
Son
Born: District of Columbia
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | District-Of-Columbia-County, District of Columbia |
| Surname | Douglas |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | District of Columbia |
| 1935 Residence (City) | Washington CITY |
| 1935 Residence (County) | District Of Columbia |
| Additional Details | |
| Occupation | inspector |
| Industry | automobile repair |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 936 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | District of Columbia |
| Birth Country | United States |
| Birthplace (normalized) | district of columbia |
| Occupation | Inspector |
| Township / Ward | Washington City |
| Est. Birth Year | ~1919 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Betty Douglas | Daughter | — | 17 | ~1923 |
| Mary Douglas | Daughter | — | 9 | ~1931 |
| Ollie Douglas | Daughter | — | 12 | ~1928 |
| Barbara Douglas | Daughter | — | 5 | ~1935 |
| William Douglas | Head | — | 50 | ~1890 |
| William Douglas | Son | — | 19 | ~1921 |
| Robert Douglas | Son | — | 15 | ~1925 |
| James Douglas | Son | — | 21 | ~1919 |
| Walter Douglas | Son | — | 25 | ~1915 |
| Marie Douglas | Spouse | — | 48 | ~1892 |
Census Appearances
1930
District Of …
Son, age 11
District Of Columbia, District of Columbia · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Douglas |
| Given Name | James W. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | District of Columbia |
| Father's Birthplace | District of Columbia |
| Mother's Birthplace | Delaware |
| Can Read/Write | Yes |
| Birth State | District of Columbia |
| Birth Country | United States |
| Birthplace (normalized) | district of columbia |
1940
District-Of-Columbia-County, District …
Son, age 21
District-Of-Columbia-County, District of Columbia · implied b. ~1919 — 10 household members
| Surname | Douglas |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | District of Columbia |
| 1935 Residence (City) | Washington CITY |
| 1935 Residence (County) | District Of Columbia |
| Occupation | inspector |
| Industry | automobile repair |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 936 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | District of Columbia |
| Birth Country | United States |
| Birthplace (normalized) | district of columbia |
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 James Douglas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Douglas
Son · 1940 · age 21 · b. ~1919 · District of Columbia
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Sibling
Betty Douglas
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Douglas
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Douglas
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Douglas
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ollie Douglas
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Douglas
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Douglas
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 — District-Of-Columbia-County, District of Columbia
Open full size
1940 US Federal Census — District-Of-Columbia-County, District of Columbia
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00564-00452)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anne L. Hennerty | 40 | Head | — | Pennsylvania |
| 2 | George F. Hennerty | 22 | Son | Apprentice | District of Columbia |
| 3 | Robert N. Hennerty | 20 | Son | Messenger | District of Columbia |
| 4 | Dorothy L. Hennerty | 19 | Daughter | Counter Girl | District of Columbia |
| 5 | Margaret E. Hennerty | 17 | Daughter | New Worker | District of Columbia |
| 6 | Helen Hennerty | 13 | Daughter | — | District of Columbia |
| 7 | John H. Erhardt | 44 | Head | Painter | District of Columbia |
| 8 | Esther A. Erhardt | 41 | Wife | Telephone Operator | District of Columbia |
| 9 | John H. Jr. Erhardt | 19 | Son | Messenger | District of Columbia |
| 10 | Earle B. Erhardt | 16 | Son | — | District of Columbia |
| 11 | Norman L. Luckey | 34 | Brother-in-law | Steam Fitter | District of Columbia |
| 12 | Mary A. Beach | 57 | Head | — | Virginia |
| 13 | Rose Marie Beach | 31 | Daughter | Waitress | Virginia |
| 14 | Henry C. Beach | 24 | Son | Insulator | Virginia |
| 15 | James E. Beach | 21 | Son | Insulator | Virginia |
| 16 | Melvin B. Smith | 34 | Head | Photographer | Wisconsin |
| 17 | Louise Smith | 27 | Wife | — | Virginia |
| 18 | Virginia Smith | 9 | Daughter | — | Delaware |
| 19 | Elsie Smith | 7 | Daughter | — | District of Columbia |
| 20 | John D. Fisher | 31 | Head | Mechanic | Ohio |
| 21 | Madeline Fisher | 32 | Wife | — | West Virginia |
| 22 | John Douglas Fisher | 3 | Son | — | Maryland |
| 23 | James O. Land | 57 | Head | Conductor | North Carolina |
| 24 | Nellie Land | 56 | Wife | — | North Carolina |
| 25 | George Land | 28 | Son | Shipping Clerk | North Carolina |
| 26 | Robert Land | 25 | Son | Salesman | North Carolina |
| 27 | Anne Land | 19 | Daughter | Cashier | North Carolina |
| 28 | Doris Land | 13 | Daughter | — | District of Columbia |
| 29 | William H. Douglas | 50 | Head | Shipping Clerk | District of Columbia |
| 30 | Marie Douglas | 48 | Wife | — | District of Columbia |
| 31 | Walter Douglas | 25 | Son | Stock Clerk | District of Columbia |
| 32 | James Douglas THIS PERSON | 21 | Son | Inspector | District of Columbia |
| 33 | William H. Jr. Douglas | 19 | Son | Messenger | District of Columbia |
| 34 | Betty Anne Douglas | 17 | Daughter | — | District of Columbia |
| 35 | Robert Allen Douglas | 15 | Son | — | District of Columbia |
| 36 | Ollie Virginia Douglas | 12 | Daughter | — | Maryland |
| 37 | Mary Ellen Douglas | 9 | Daughter | — | District of Columbia |
| 38 | Barbara Douglas | 5 | Daughter | — | District of Columbia |
| 39 | Mary E. Pomeroy | 55 | Head | — | District of Columbia |
| 40 | Cornelius Pomeroy | 35 | Son | Clerk | District of Columbia |
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)