PJ
Peter Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Alameda-County, California
Our Model Tree links this Peter Johnson across the 1910, 1920, 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed) — first a head (b.~1889), then head of a 5-person household.
Age 51
b. ~1889
Male
Head
Born: Finland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Alameda-County, California |
| Surname | Johnson |
| Given Name | Peter |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | City of Berkeley |
| 1935 Residence (County) | Alameda |
| Naturalization Status | First papers filed |
| Additional Details | |
| Occupation | Deck Hand |
| Industry | Standard Oil |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1440 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
| Occupation | Deck Hand |
| Township / Ward | City Of Berkeley |
| Est. Birth Year | ~1889 |
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 Peter | Age | Birth yr |
|---|---|---|---|---|
| Clara Johnson | Daughter | — | 15 | ~1925 |
| Peter Johnson | Head | — | 51 | ~1889 |
| Arthur Johnson | Son | — | 18 | ~1922 |
| Gunnar Johnson | Son | — | 20 | ~1920 |
| Hilja Johnson | Spouse | — | 45 | ~1895 |
Census Appearances
1910
Mason, Washington
Other, age 21
Mason, Washington · implied b. ~1889 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Peter |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Finland |
| Years Married | 1907 |
| Children Born | Al |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | Woodsman |
| Industry | Logging |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1920
Alameda, California
Other, age 30
Alameda, California · implied b. ~1890 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Peter |
| Relationship to Head | Lodger |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Finland |
| Year of Immigration | 1910 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | Waiter |
| Industry | Steamship |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Finnish |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1930
Alameda, California
Head, age 41
Alameda, California · implied b. ~1889 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Peter |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Finland |
| Naturalization Status | First papers filed |
| Year of Immigration | 1910 |
| Age at First Marriage | 30 |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | painter |
| Industry | house painting |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | Finnish |
| Home Owned/Rented | O |
| Home Value / Rent | 3000 |
| Veteran | No |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1940
Alameda-County, California
Head, age 51
Alameda-County, California · implied b. ~1889 — 5 household members
| Surname | Johnson |
| Given Name | Peter |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | City of Berkeley |
| 1935 Residence (County) | Alameda |
| Naturalization Status | First papers filed |
| Occupation | Deck Hand |
| Industry | Standard Oil |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1440 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
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 Peter Johnson across 4 US Census years (1910, 1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Peter Johnson
Head · 1940 · age 51 · b. ~1889 · 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 — Alameda-County, California
Open full size
1940 US Federal Census — Alameda-County, California
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00189-00506)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ernest W. Anthony | 24 | Head | Cooper | California |
| 2 | Cyril M. Jorgensen | 25 | Lodger | Cooper | California |
| 3 | Edna F. Willis | 47 | Head | Hotel Mg. | California |
| 4 | Elizabeth Merchant | 69 | Head | — | Switzerland |
| 5 | Lorna M. Williams | 28 | Head | Osteopathic Phys. | Canada-Eng. |
| 6 | Selma Ylitalo | 49 | Lodger | Prac. Nurse | Iowa |
| 7 | Dolce C. Mansfield | 53 | Lodger | Osteopathic Phys. | Oregon |
| 8 | Cornelia D. Johnston | 63 | Head | — | Michigan |
| 9 | Eleanor J. Drake | 60 | Sister | — | Michigan |
| 10 | Charles J. Rogers | 44 | Head | Inspector | Nebraska |
| 11 | Pernal J. Rogers | 36 | Wife | Pt. Owner Beauty Shop | Iowa |
| 12 | George Cohelan | 25 | Head | Milk Man | California |
| 13 | Evelyn E. Cohelan | 23 | Wife | — | Iowa |
| 14 | Betty Moriarty | 38 | Head | — | Scotland |
| 15 | Eileen A. Moriarty | 18 | Daughter | — | Canada-Eng. |
| 16 | Janet L. Moriarty | 10 | Daughter | — | Canada-Eng. |
| 17 | Janet B. Attis | 62 | Mother | — | Scotland |
| 18 | Emily S. Harris | 52 | Wife | — | Washington |
| 19 | Daniel E. Harris | 53 | Head | Wholesale Merchant | California |
| 20 | Anna May Woods | 54 | Head | Mgr. Rooming House | Missouri |
| 21 | Gordon Griffiths | 26 | Head | Teaching Asst. | California |
| 22 | Winifred M. Griffiths | 23 | Wife | Reader | England |
| 23 | Henrietta T. Austin | 49 | Head | — | Illinois |
| 24 | Peter Johnson THIS PERSON | 51 | Head | Deck Hand | Finland |
| 25 | Hilja E. Johnson | 45 | Wife | Policy & Room House | Finland |
| 26 | Gunnar W. Johnson | 20 | Son | Wiper Engine Room | Berkeley |
| 27 | Arthur E. Johnson | 18 | Son | — | California |
| 28 | Clara D. Johnson | 15 | Daughter | — | California |
| 29 | Effie J. Scivell | 60 | Head | Rooming House Mgr. | Indiana |
| 30 | Hugh T. Buckingham | 56 | Lodger | — | California |
| 31 | Lotta Buckingham | 57 | Lodger | — | Michigan |
| 32 | Esten P. Bush | 34 | Lodger | Private Tutor | Arkansas |
| 33 | John A. Harris | 38 | Lodger | Janitor Work | Montana |
| 35 | Albert L. Baker | 52 | Head | Mfg. Agent | Ohio |
| 36 | Rubie R. Baker | 52 | Wife | — | Ohio |
| 37 | John R. Baker | 28 | Son | Real Estate Agent | California |
| 38 | Betty Baker | 25 | Daughter | — | California |
| 39 | Ruth C. Richards | 43 | Sister-in-law | Real Estate Agent | California |
| 40 | James W. Crossley | 59 | Head | — | New York |
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)