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James Donnelly — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this James Donnelly across the 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 7-person household.
Age 21
b. ~1919
Male
Son
Born: Wisconsin
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Donnelly |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Los Angeles City |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Occupation | final assembly |
| Industry | Aircraft factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Final Assembly |
| Township / Ward | Los Angeles City |
| Est. Birth Year | ~1919 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Helen Donnelly | Daughter | — | 18 | ~1922 |
| Charles Donnelly | Head | — | 45 | ~1895 |
| Charles Donnelly | Son | — | 16 | ~1924 |
| David Donnelly | Son | — | 14 | ~1926 |
| James Donnelly | Son | — | 21 | ~1919 |
| Dorothy Donnelly | Spouse | — | 45 | ~1895 |
| Clifford Donnelly | Son | — | 6 | ~1934 |
Census Appearances
1930
Los Angeles, …
Son, age 11
Los Angeles, California · implied b. ~1919 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donnelley |
| Given Name | James R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Los-Angeles-County, California
Son, age 21
Los-Angeles-County, California · implied b. ~1919 — 7 household members
| Surname | Donnelly |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Los Angeles City |
| 1935 Residence (County) | Los Angeles |
| Occupation | final assembly |
| Industry | Aircraft factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 Donnelly across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Donnelly
Son · 1940 · age 21 · b. ~1919 · California
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Sibling
Charles Donnelly
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Donnelly
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Donnelly
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clifford Donnelly
Sibling · 1940 · age 6
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 — Los-Angeles-County, California
Open full size
1940 US Federal Census — Los-Angeles-County, California
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00387-00340)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ford Whittaker | 25 | Lodger | Mechanic | Michigan |
| 2 | Frank Batre | 34 | Head | Builder | California |
| 3 | Mercedes Batre | 33 | Wife | — | Illinois |
| 4 | Pauline Batre | 14 | daughter | — | California |
| 5 | Thomas J Brown | 75 | Head | — | Illinois |
| 6 | Lula Brown | 74 | Wife | — | Missouri |
| 7 | William Rouch | 75 | Head | Sta. Engineer | Ohio |
| 8 | Lillie Rouch | 58 | Wife | — | Illinois |
| 9 | Mary Lathrop | 15 | Lodger | — | Georgia |
| 10 | Glen E Masters | 31 | Head | Electrician | Idaho |
| 11 | Virginia E Masters | 21 | Wife | — | Indiana |
| 12 | Cora Holland | 62 | Head | — | Wisconsin |
| 13 | Ernest J Holland | 25 | Son | Lead Man | Michigan |
| 14 | Ralph W Holland | 24 | Son | Laborer | Michigan |
| 15 | Jacob W Eikenberry | 26 | Head | Truck Driver | Indiana |
| 16 | Martha A Eikenberry | 23 | Wife | — | Pennsylvania |
| 17 | Patricia H Eikenberry | 3 | daughter | — | California |
| 18 | Allan M Means | 50 | Head | Clerk | Minnesota |
| 19 | Effie J Means | 45 | Wife | — | Utah |
| 20 | Nanda M Means | 16 | daughter | — | California |
| 21 | Betty J Means | 16 | daughter | — | California |
| 22 | Harry Shepherdson | 45 | Head | Plumber | Pennsylvania |
| 23 | Matilda Shepherdson | 29 | Wife | — | Switzerland |
| 25 | Dwight Dei | 59 | Head | Carpenter | Illinois |
| 26 | Hildegarde Dei | 49 | Wife | — | Iowa |
| 27 | Hortense Dei | 30 | daughter | Comptometer | Montana |
| 28 | Hortense Fitzpatrick | 73 | Mother | — | Iowa |
| 29 | Charles Donnelly | 45 | Head | Owner Garage | Wisconsin |
| 30 | Dorothy Donnelly | 45 | Wife | Nurse | Iowa |
| 31 | James Donnelly THIS PERSON | 21 | son | Final Assembly | Wisconsin |
| 32 | Helen Donnelly | 18 | daughter | — | California |
| 33 | Charles Donnelly | 16 | son | — | California |
| 34 | David Donnelly | 14 | son | — | California |
| 35 | Clifford Donnelly | 6 | son | — | California |
| 36 | Harold F Biddle | 35 | Head | Supervisor | Utah |
| 37 | Helen A Biddle | 26 | Wife | — | Washington |
| 38 | William F Jones | 57 | Head | Baker | England |
| 39 | Lillian Jones | 54 | Wife | — | England |
| 40 | Elsie Jones | 34 | daughter | Stenographer | Massachusetts |
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)