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John King — 1940 US Census Record
Model Tree available1940 United States Federal Census · Montgomery-County, Maryland
Our Model Tree links this John King across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Maryland (XGBoost, ~Confirmed), with identified parents Henry & Gertrude — first a head (b.~1901), then head of a 3-person household.
Age 39
b. ~1901
Male
Head
Born: Virginia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Maryland |
| Surname | King |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Virginia |
| 1935 Residence (City) | D.C. |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Supervisor |
| Industry | Grocery Co-Retail |
| Class of Worker | PW |
| Hours Worked | 62 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
| Occupation | Supervisor |
| Township / Ward | Silver Spring Woodside Pt |
| Est. Birth Year | ~1901 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John King | Head | — | 39 | ~1901 |
| John King | Son | — | 11 | ~1929 |
| Tacie King | Spouse | — | 33 | ~1907 |
Census Appearances
1920
None, District …
Son, age 18
None, District of Columbia · implied b. ~1902 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | King |
| Given Name | John W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Occupation | Clerk |
| Industry | Grocery Store |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1930
None, District …
Head, age 28
None, District of Columbia · implied b. ~1902
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | King |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Virginia |
| Age at First Marriage | 22 |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Occupation | Manager |
| Industry | Grocery Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 52 |
| Radio Set | R |
| Veteran | No |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1940
Montgomery-County, Maryland
Head, age 39
Montgomery-County, Maryland · implied b. ~1901 — 3 household members
| Surname | King |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Virginia |
| 1935 Residence (City) | D.C. |
| 1935 Residence (County) | Montgomery |
| Occupation | Supervisor |
| Industry | Grocery Co-Retail |
| Class of Worker | PW |
| Hours Worked | 62 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
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 John King across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Henry King (~0.92 confidence) and mother Gertrude King (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Henry King
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Gertrude King
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John King
Head · 1940 · age 39 · b. ~1901 · 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 — 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-t0627-01555-00618)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary F Pollitt | 26 | Lodger | Marker | Maryland |
| 2 | Raul R Jr Mattox | 17 | Son | Clerk | Michigan |
| 3 | Andrew Spencer | 27 | Head | Contractor | D.C. |
| 4 | Amelie Spencer | 28 | Wife | Clerk | D.C. |
| 5 | Lawrence B Schuler | 31 | Head | Machinist | Maryland |
| 6 | Fannie W Schuler | 39 | Wife | Clerk | Maryland |
| 7 | Hermann Bode | 30 | Head | Huckster | Germany |
| 8 | Ruth Bode | 30 | Wife | Clerk | Maryland |
| 9 | Herman Engelhardt | 33 | Head | Draftsman | Maryland |
| 10 | Catherine Engelhardt | 34 | Wife | Clerk | Maryland |
| 11 | Frank Lambert | 32 | Head | Service Man | Maine |
| 12 | Beatrice Lambert | 31 | Wife | Clerk | Maryland |
| 13 | Lynne Lambert | 1 | Daughter | — | D.C. |
| 14 | R. S. Ladd | 40 | Head | Library Asst | Vermont |
| 15 | Margaret C Ladd | 37 | Wife | Secretarial | Connecticut |
| 16 | William P Linkins | 40 | Head | Sales Manager | D.C. |
| 17 | Marie Linkins | 37 | Wife | Clerk | New York |
| 18 | William P, Jr Linkins | 17 | Son | Clerk | D.C. |
| 19 | Robert Mason Linkins | 15 | Son | Clerk | D.C. |
| 20 | Lizzie B Clayton | 80 | Mother-in-law | Clerk | D.C. |
| 21 | Thomas J Dempsey | 36 | Head | Factory Representative | Pennsylvania |
| 22 | Elizabeth Dempsey | 34 | Wife | Clerk | Pennsylvania |
| 23 | Thomas Jr Dempsey | 11 | Son | — | Pennsylvania |
| 24 | Mary Elizabeth Dempsey | 10 | Daughter | — | Indiana |
| 25 | Catherine T Dempsey | 9 | Daughter | — | Pennsylvania |
| 26 | William E. Marvel | 39 | Head | Mechanician | D.C. |
| 27 | Ethel W. Marvel | 40 | Wife | Clerk | Virginia |
| 28 | William E. Jr Marvel | 15 | Son | Carrier | D.C. |
| 29 | John W. King THIS PERSON | 39 | Head | Supervisor | Virginia |
| 30 | Tacie King | 33 | Wife | Clerk | Virginia |
| 31 | John W, Jr King | 11 | Son | — | D.C. |
| 32 | Selden Cole | 35 | Head | Contractor | South Dakota |
| 33 | Helen Cole | 34 | Wife | Teacher | Maryland |
| 34 | Raymond J. Baker | 48 | Head | Book-Binder | Massachusetts |
| 35 | Elsie A. Baker | 39 | Wife | Manager | Missouri |
| 36 | Carl W Humphries | 32 | Head | Collector | D.C. |
| 37 | Lillian Humphries | 29 | Wife | Clerk | Virginia |
| 38 | David L Waldron | 50 | Head | Lawyer | Pennsylvania |
| 39 | Collette M Waldron | 37 | Wife | Clerk | Pennsylvania |
| 40 | Ronayne M Waldron | 14 | Son | Clerk | Pennsylvania |
Pedigree Summary
John
Gen 1 · 2 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)