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Catherine Kennedy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Contra-Costa-County, California
Our Model Tree links this Catherine Kennedy across the 1930 and 1940 US Censuses in Contra-Costa-County, California (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 9-person household.
Age 14
b. ~1926
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Contra-Costa-County, California |
| Surname | Kennedy |
| Given Name | Catherine |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Crockett |
| 1935 Residence (County) | Contra Costa |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same house |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Crockett |
| Est. Birth Year | ~1926 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Catherine | Age | Birth yr |
|---|---|---|---|---|
| Catherine Kennedy | Daughter | — | 14 | ~1926 |
| Helen Kennedy | Daughter | — | 17 | ~1923 |
| Margurite Kennedy | Daughter | — | 20 | ~1920 |
| Jack Kennedy | Son | — | 25 | ~1915 |
| Paul Kennedy | Son | — | 23 | ~1917 |
| Theresa Kennedy | Daughter | — | 9 | ~1931 |
| Mary Kennedy | Daughter | — | 21 | ~1919 |
| Mary Kennedy | Spouse | — | 49 | ~1891 |
| John Kennedy | Head | — | 58 | ~1882 |
Census Appearances
1930
Contra Costa, …
Daughter, age 4
Contra Costa, California · implied b. ~1926 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | Catherine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read/Write | No |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Contra-Costa-County, California
Daughter, age 14
Contra-Costa-County, California · implied b. ~1926 — 9 household members
| Surname | Kennedy |
| Given Name | Catherine |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Crockett |
| 1935 Residence (County) | Contra Costa |
| Highest Grade | 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 Catherine Kennedy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Catherine Kennedy
Daughter · 1940 · age 14 · b. ~1926 · California
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Sibling
Margurite Kennedy
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Kennedy
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jack Kennedy
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Kennedy
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Kennedy
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Kennedy
Sibling · 1940 · age 9
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 — Contra-Costa-County, California
Open full size
1940 US Federal Census — Contra-Costa-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00197-00541)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jerry Don Blackbird | 1 | nephew | — | California |
| 2 | John Kennedy | 58 | head | Janitor | Eire |
| 3 | Mary Kennedy | 49 | wife | — | Eire |
| 4 | Jack John Kennedy | 25 | son | — | California |
| 5 | Paul Kennedy | 23 | son | News Worker | California |
| 6 | Mary Frances Kennedy | 21 | daughter | Hair Dresser | California |
| 7 | Margurite Kennedy | 20 | daughter | Sugar Worker | California |
| 8 | Helen Kennedy | 17 | daughter | — | California |
| 9 | Catherine Kennedy THIS PERSON | 14 | daughter | — | California |
| 10 | Theresa Ann Kennedy | 9 | daughter | — | California |
| 11 | John Riordan | 81 | head | — | Eire |
| 12 | Mary Riordan | 72 | wife | — | Eire |
| 13 | William Drake | 72 | lodger | — | Virginia |
| 14 | Cornelius Donovan | 50 | lodger | Warehouseman | Eire |
| 15 | Antonio Simao | 50 | lodger | Trucker | Portugal |
| 16 | Frank Lopes | 48 | lodger | Stevedore | Portugal |
| 17 | Michael Mihilovich | 43 | lodger | Labor | Serbia |
| 18 | Jesse L Pennington | 19 | lodger | Warehouse | Missouri |
| 19 | James Elliott | 29 | lodger | Sugar Worker | Idaho |
| 20 | Paul Papanikolau | 33 | lodger | Waiter | Greece |
| 21 | Fred Sybade | 66 | lodger | Carpenter | Switzerland |
| 22 | — | None | — | — | — |
| 23 | Nina Pegden | 46 | head | — | Ohio |
| 24 | Elizabeth Pegden | 16 | daughter | See | Susanville |
| 25 | Paul Papanikolau | None | extra | — | — |
| 26 | Pasalina Demignani | 61 | head | — | Italy |
| 27 | Francesca Paolinetti | 46 | lodger | Warehouse | Italy |
| 28 | Alfred Demignani | 39 | head | Sugar Worker | Italy |
| 29 | Doris Demignani | 38 | wife | — | California |
| 30 | Alfred Demignani | 20 | son | Sugar Worker | California |
| 31 | Betty Jane Demignani | 18 | daughter | — | California |
| 32 | Giulio Sebastiano | 57 | head | Longshoreman | Italy |
| 33 | Theresa Sebastiano | 45 | wife | — | Italy |
| 34 | Julio Sebastiano | 21 | son | Sugar Worker | California |
| 35 | Dino Sebastiano | 16 | son | — | California |
| 36 | Victor Sebastiano | 10 | son | — | California |
| 37 | Zoraide Sebastiano | 64 | sister | — | Italy |
| 38 | Agata Billeci | 23 | head | — | Italy |
| 39 | John Billeci | 33 | son | Fisherman | California |
| 40 | Frank Billeci | 27 | son | Fisherman | 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)