FJ
Frederick Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Frederick Johnson across the 1920, 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a head (b.~1866), then head of a 3-person household.
Age 74
b. ~1866
Male
Head
Born: Maine
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Johnson |
| Given Name | Frederick A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 74 |
| Marital Status | Married |
| Birthplace | Maine |
| 1935 Residence (City) | Long Beach City |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Occupation | No No No No |
| Industry | 8 |
| Class of Worker | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
| Occupation | No No No No |
| Township / Ward | Long Beach City |
| Est. Birth Year | ~1866 |
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 Frederick | Age | Birth yr |
|---|---|---|---|---|
| Florence Upright | Daughter | — | 43 | ~1897 |
| Frederick Johnson | Head | — | 74 | ~1866 |
| M Johnson | Spouse | — | 43 | ~1897 |
Census Appearances
1920
Los Angeles, …
Head, age 54
Los Angeles, California · implied b. ~1866 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Frederick |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Maine |
| Father's Birthplace | Maine |
| Mother's Birthplace | Maine |
| Occupation | Engineer |
| Industry | Shipyards |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1930
Los Angeles, …
Head, age 64
Los Angeles, California · implied b. ~1866 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Frederick T. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Maine |
| Age at First Marriage | 29 |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Maine |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 8,000 |
| Radio Set | R |
| Veteran | No |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1940
Los-Angeles-County, California
Head, age 74
Los-Angeles-County, California · implied b. ~1866 — 3 household members
| Surname | Johnson |
| Given Name | Frederick A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 74 |
| Marital Status | Married |
| Birthplace | Maine |
| 1935 Residence (City) | Long Beach City |
| 1935 Residence (County) | Los Angeles |
| Occupation | No No No No |
| Industry | 8 |
| Class of Worker | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
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 Frederick Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Frederick Johnson
Head · 1940 · age 74 · b. ~1866 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Los-Angeles-County, California
Open full size
1940 US Federal Census — Los-Angeles-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00369-00117)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Virginia Fletcher | 18 | Daughter | — | Iowa |
| 42 | David S. Wilson | 64 | Head | Salesman | Ireland |
| 43 | Sarah Wilson | 62 | Wife | No No No No | Illinois |
| 44 | Wallace W. Sharpe | 75 | Head | No No No No | Pennsylvania |
| 45 | Anna Sharpe | 63 | Wife | No No No No | Nebraska |
| 46 | Ross H. Russell | 58 | Head | Building Contractor | Iowa |
| 47 | Blanche M. Russell | 58 | Wife | No No No No | Iowa |
| 48 | Ralph Russell | 27 | Son | Carpenter | Iowa |
| 49 | Bill Russell | 18 | Son | Usher | Iowa |
| 50 | Patricia Russell | 8 | Daughter | — | California |
| 51 | Joseph A. Phelan | 47 | Head | Merchant | Pennsylvania |
| 52 | Lillian Phelan | 42 | Wife | Clerk | Pennsylvania |
| 53 | Josie M. Brown | 84 | Head | No No No No | Missouri |
| 54 | Myrtle Larkins | 77 | Companion | No No No No | Missouri |
| 55 | Robert J. Keller | 52 | Head | Machinist | Colorado |
| 56 | Ethel F. Keller | 60 | Wife | Press Operator | Illinois |
| 57 | Chris Peterson | 42 | Head | Contractor | Denmark |
| 58 | Anna Peterson | 40 | Wife | Housekeeper | Denmark |
| 59 | Ewell Peterson | 14 | Son | Gardener | California |
| 60 | Betty J. Peterson | 13 | Daughter | — | California |
| 61 | Floyd Peterson | 10 | Son | — | California |
| 62 | Clement Dunne | 60 | Head | Baker | England |
| 63 | Gertrude Dunne | 58 | Wife | No No No No | Germany |
| 64 | John Darcy | 75 | Step-father | No No No No | England |
| 65 | Robert Bean | 51 | Boarder | Shipping Clerk | England |
| 66 | Eugene W. Seward | 86 | Head | No No No No | Illinois |
| 67 | Elizabeth Seward | 78 | Wife | No No No No | New York |
| 68 | Mathilda De Gurlach | 78 | Housekeeper | No No No No | Iowa |
| 69 | Eunice L. Herring | 73 | Head | No No No No | Illinois |
| 70 | Warren C. Leonard | 58 | Head | No No No No | Massachusetts |
| 71 | Lula L. Leonard | 61 | Wife | No No No No | Illinois |
| 72 | Ann Hann M. Leonard | 85 | Mother | No No No No | Massachusetts |
| 73 | Frederick A. Johnson THIS PERSON | 74 | Head | No No No No | Maine |
| 74 | M. Evelyn Johnson | 43 | Wife | No No No No | Wisconsin |
| 75 | Florence Upright | 43 | Daughter | P.B.X. Operator | Michigan |
| 76 | Harry H. Hayes | 57 | Head | Pumper | Pennsylvania |
| 77 | Louie Hayes | 57 | Wife | No No No No | Michigan |
| 78 | Harry W. Hayes | 27 | Son | Decorator | California |
| 79 | John B. Dietrich | 69 | Head | Merchant | Montana |
| 80 | Mita S. Dietrich | 56 | Wife | Seamstress | Mexico |
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)