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James Powers — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this James Powers across the 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 15-person household.
Age 12
b. ~1928
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Powers |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1928 |
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.
15 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Betty Powers | Daughter | — | 15 | ~1925 |
| Thomas Colla | Head | — | 55 | ~1885 |
| Francesca Parolina | Other | — | 85 | ~1855 |
| James Powers | Son | — | 12 | ~1928 |
| Robert Powers | Son | — | 8 | ~1932 |
| Joseph Colla | Son | — | 13 | ~1927 |
| Peter Colla | Son | — | 36 | ~1904 |
| Mary Colla | Son | — | 7 | ~1933 |
| Sam Colla | Son | — | 17 | ~1923 |
| Melvin Powers | Son | — | 1 | ~1939 |
| Betty Powers | Spouse | — | 40 | ~1900 |
| Leo Powers | Spouse | — | 41 | ~1899 |
| Jenny Barbieri | Spouse | — | 26 | ~1914 |
| Horace Barbieri | Spouse | — | 29 | ~1911 |
| Josephine Colla | Spouse | — | 51 | ~1889 |
Census Appearances
1930
San Francisco, …
Son, age 2
San Francisco, California · implied b. ~1928 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Powers |
| Given Name | James J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | Switzerland |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Son, age 12
San-Francisco-County, California · implied b. ~1928 — 15 household members
| Surname | Powers |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Powers across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Powers
Son · 1940 · age 12 · b. ~1928 · California
★ You are viewing this record
Sibling
Sam Colla
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Peter Colla
Sibling · 1940 · age 36
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Powers
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Colla
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Melvin Powers
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Powers
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Colla
Sibling · 1940 · age 13
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 — San-Francisco-County, California
Open full size
1940 US Federal Census — San-Francisco-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00309-00372)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Henry | 25 | Son | — | Florida |
| 42 | Frances | 27 | Daughter | Clerk | Florida |
| 43 | Joe | 20 | Son | Clerk | Florida |
| 44 | Mary | 19 | Daughter | — | Florida |
| 45 | Martha | 16 | Daughter | — | Florida |
| 46 | Lucy | 16 | Daughter | — | Florida |
| 47 | Rudolph | 15 | Son | — | Florida |
| 48 | Mario O Perazzo | 32 | Head | General Laborer | California |
| 49 | Olive Perazzo | 31 | Wife | — | California |
| 50 | Rose A Zimmerman | 51 | Head | — | Portland Oregon |
| 51 | Thomas Colla | 55 | Head | — | Italy |
| 52 | Josephine Colla | 51 | Wife | — | Italy |
| 53 | Peter Colla | 36 | Son | Truck Driver | California |
| 54 | Sam Colla | 17 | Son | — | California |
| 55 | Joseph Colla | 13 | Son | — | California |
| 56 | Mary Colla | 7 | Son | — | California |
| 57 | Francesca Parolina | 85 | Mother Law | — | Italy |
| 58 | Frances | 23 | Daughter | — | California |
| 59 | Antoinette | 16 | Daughter | — | California |
| 60 | Betty O Powers | 40 | Wife | — | Switzerland |
| 61 | Leo Powers | 41 | Husband | — | California |
| 62 | Betty Powers | 15 | Daughter | — | California |
| 63 | James Powers THIS PERSON | 12 | Son | — | California |
| 64 | Robert Powers | 8 | Son | — | California |
| 65 | Melvin Powers | 1 | Son | — | California |
| 66 | Jenny G Barbieri | 26 | Wife | Stenographer | California |
| 67 | Horace Barbieri | 29 | Husband | Shipping Clerk | California |
| 68 | Raymond A Bjorkland | 31 | Head | Packer | Minnesota |
| 69 | Rosalind Bjorkland | 25 | Wife | Packer | California |
| 70 | Gertrude O Gallwitz | 33 | Head | — | California |
| 71 | Alois Gallwitz | 37 | Husband | Baker | Germany |
| 72 | Thelma G O'Keefe | 31 | Head | — | California |
| 73 | Henry O'Keefe | 33 | Husband | Radio Service | California |
| 74 | Robert O'Keefe | 0 | Son | — | California |
| 75 | Leonard S Arundell | 33 | Head | Insurance | California |
| 76 | Annie R Arundell | 57 | Wife | — | Norway |
| 77 | Annie Arundell | 74 | Mother | — | Norway |
| 78 | Marie O Lanzavecchia | 28 | Head | — | California |
| 79 | John Lanzavecchia | 31 | Husband | Millman | California |
| 80 | John Lanzavecchia | 3 | Son | — | California |
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)