JM
James Mccarthy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Alameda-County, California
Our Model Tree links this James Mccarthy across the 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 15-person household.
Age 15
b. ~1925
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Alameda-County, California |
| Surname | MCCARTHY |
| Given Name | JAMES |
| Relationship to Head | SON |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Oakland |
| 1935 Residence (County) | Alameda |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 8 |
| 1935 Residence | Same house |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Oakland |
| Est. Birth Year | ~1925 |
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 |
|---|---|---|---|---|
| Marie Puhalovic | Daughter | — | 17 | ~1923 |
| Roberta Carloff | Daughter | — | 4 | ~1936 |
| Phyllis Lalorlaler | Daughter | — | 15 | ~1925 |
| Tony Madaras | Other | — | 28 | ~1912 |
| John Andrich | Other | — | 26 | ~1914 |
| Hattie Goldnamer | Other | — | 71 | ~1869 |
| Edward Costelli | Other | — | 39 | ~1901 |
| Richard Lefrancis | Son | — | 19 | ~1921 |
| Leslie Lalorlaler | Son | — | 20 | ~1920 |
| Joseph Bacon | Son | — | 31 | ~1909 |
| James Mccarthy | Son | — | 15 | ~1925 |
| Robert Mcgann | Son | — | 2 | ~1938 |
| Eddy Davalle | Son | — | 22 | ~1918 |
| Ralph Puhalovic | Son | — | 14 | ~1926 |
| Rose Madaras | Spouse | — | 26 | ~1914 |
Census Appearances
1930
Alameda, California
Son, age 5
Alameda, California · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | James D |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Pennsylvania |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Alameda-County, California
Son, age 15
Alameda-County, California · implied b. ~1925 — 15 household members
| Surname | MCCARTHY |
| Given Name | JAMES |
| Relationship to Head | SON |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Oakland |
| 1935 Residence (County) | Alameda |
| Income (1939) | 0 |
| Highest Grade | Hs 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 Mccarthy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Mccarthy
Son · 1940 · age 15 · b. ~1925 · California
★ You are viewing this record
Sibling
Robert Mcgann
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Lefrancis
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roberta Carloff
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Phyllis Lalorlaler
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Bacon
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Puhalovic
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leslie Lalorlaler
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ralph Puhalovic
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eddy Davalle
Sibling · 1940 · age 22
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 — Alameda-County, California
Open full size
1940 US Federal Census — Alameda-County, California
Page Contents
23 people indexed on this census page (nara:1940:m-t0627-00433-00857)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 2 | Hattie Goldnamer | 71 | MOTHER | — | Iowa |
| 4 | Edward Costelli | 39 | LODGER | Operator | Italy |
| 6 | James Mccarthy THIS PERSON | 15 | SON | — | California |
| 8 | Roberta Carloff | 4 | DAUGHTER | Same Place | California |
| 10 | Marie Puhalovic | 17 | DAUGHTER | — | California |
| 11 | Ralph Puhalovic | 14 | SON | — | California |
| 12 | John Andrich | 26 | STEP-SON | Optician | California |
| 14 | Eddy Davalle | 22 | SON | Attendant | California |
| 16 | Joseph Bacon | 31 | SON | — | Missouri |
| 17 | Leslie Lalor|Laler | 20 | SON | Clerk Office | California |
| 18 | Phyllis Lalor|Laler | 15 | DAUGHTER | — | California |
| 19 | Richard Lefrancis | 19 | SON | — | Washington |
| 20 | Robert Mcgann | 2 | SON | Same Place | California |
| 21 | Tony Madaras | 28 | BROTHER | Moulder | California |
| 22 | Rose Madaras | 26 | WIFE | — | Nebraska |
| 23 | Bertha S. Rogers | 28 | HEAD | — | Connecticut |
| 24 | Roland V. Godin | 9 | STEP-SON | — | Connecticut |
| 25 | Peter Knachbaur | 7 | SON | — | California |
| 26 | Frederick Knachbaur | 5 | SON | — | California |
| 27 | Mary Anne Ely | 15 | DAUGHTER | — | Washington |
| 28 | Olive Miller | 22 | DAUGHTER | — | Illinois |
| 29 | Virginia Miller | 18 | DAUGHTER | — | California |
| 30 | Margaret Pendleton | 61 | HEAD | — | Missouri |
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)