JM
John Murdock — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Napa-County, California
Our Model Tree links this John Murdock across the 1930 and 1940 US Censuses in Napa-County, California (XGBoost, ~Confirmed) — first a head (b.~1902), then head of a 5-person household.
Age 38
b. ~1902
Male
Head
Born: Utah
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Napa-County, California |
| Surname | Murdock |
| Given Name | John H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Utah |
| 1935 Residence (City) | De Vita Tract |
| 1935 Residence (County) | Napa |
| Additional Details | |
| Occupation | Sales Manager |
| Industry | Retail Furniture |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 156 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
| Occupation | Sales Manager |
| Township / Ward | De Vita Tract |
| Est. Birth Year | ~1902 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Murdock | Head | — | 38 | ~1902 |
| Paul Murdock | Son | — | 10 | ~1930 |
| Margaret Murdock | Daughter | — | 12 | ~1928 |
| John Murdock | Son | — | 5 | ~1935 |
| Helen Murdock | Spouse | — | 38 | ~1902 |
Census Appearances
1930
Sacramento, California
Head, age 28
Sacramento, California · implied b. ~1902 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Murdock |
| Given Name | John S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Utah |
| Age at First Marriage | 22 |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Occupation | Salesman |
| Industry | Motor Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | un |
| Radio Set | R |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1940
Napa-County, California
Head, age 38
Napa-County, California · implied b. ~1902 — 5 household members
| Surname | Murdock |
| Given Name | John H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Utah |
| 1935 Residence (City) | De Vita Tract |
| 1935 Residence (County) | Napa |
| Occupation | Sales Manager |
| Industry | Retail Furniture |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 156 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
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 Murdock across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Murdock
Head · 1940 · age 38 · b. ~1902 · California
★ 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 — Napa-County, California
Open full size
1940 US Federal Census — Napa-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00269-00640)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Leland Coombs | 19 | Son | — | California |
| 2 | George L Brooker | 45 | Head | Construction Foreman | Nebraska |
| 3 | Ethel G Brooker | 45 | Wife | — | California |
| 4 | Sally Anglim | 8 | Daughter | — | California |
| 5 | William S Barker | 41 | Head | Barber | Kansas |
| 6 | Betty N Barker | 32 | Wife | Saleslady | Kansas |
| 7 | William V Barker | 18 | Son | — | Nebraska |
| 8 | Oscar J Pearson | 39 | Head | Well Driller | Oklahoma |
| 9 | Ida L Pearson | 37 | Wife | — | Missouri |
| 10 | Lois M Pearson | 19 | Daughter | — | California |
| 11 | George E Warner | 42 | Head | Crystal Plywood Dealer | Nebraska |
| 12 | Gertrude A Warner | 28 | Wife | — | California |
| 13 | John J Pough | 39 | Head | Electrical Machinist | Pennsylvania |
| 14 | Evelyn M Pough | 25 | Wife | — | California |
| 15 | John H Murdock THIS PERSON | 38 | Head | Sales Manager | Utah |
| 16 | Helen B Murdock | 38 | Wife | — | Utah |
| 17 | Margaret Murdock | 12 | Daughter | — | Utah |
| 18 | Paul B Murdock | 10 | Son | — | Utah |
| 19 | John Q Murdock | 5 | Son | — | California |
| 20 | Percy E Porter | 40 | Head | Supervisor | Minnesota |
| 21 | Cecilia R Porter | 43 | Wife | — | Minnesota |
| 22 | Robert E Porter | 21 | Son | Clerk | Minnesota |
| 23 | Richard W Porter | 16 | Son | — | Indiana |
| 24 | Russell S Pyle | 35 | Head | Welder | California |
| 25 | Thelma E Pyle | 38 | Wife | — | Colorado |
| 26 | Kenneth D Hall | 29 | Head | Hardwood Floor Helper | California |
| 27 | Helen F Hall | 24 | Wife | Saleslady | California |
| 28 | Kenneth L Hall | 5 | Son | — | California |
| 29 | Gary D Hall | 2 | Son | — | California |
| 30 | Harold D Fredrickson | 42 | Head | Machinist | California |
| 31 | Harriett H Fredrickson | 39 | Wife | — | Minnesota |
| 32 | Grace S Fredrickson | 11 | Daughter | — | California |
| 33 | John G Walker | 67 | Head | Proprietor | Kansas |
| 34 | Olive M Walker | 67 | Wife | — | Indiana |
| 35 | William R Bower | 51 | Head | Manager | Pennsylvania |
| 36 | Elvera O Bower | 34 | Wife | Telephone Operator | Minnesota |
| 37 | Extra Line | None | — | — | — |
| 38 | Harry J Miller | 47 | Head | Automotive Mechanic | Colorado |
| 39 | Ruth A Miller | 48 | Wife | — | Nebraska |
| 40 | Ruth A Miller | 22 | Daughter | Manager | Utah |
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)