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Mary Mulligan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Mary Mulligan across the 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 9-person household.
Age 10
b. ~1930
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Mulligan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Los Angeles City |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Same House |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Los Angeles City |
| Est. Birth Year | ~1930 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Patricia Mulligan | Daughter | — | 13 | ~1927 |
| Elizabeth Mulligan | Spouse | — | 46 | ~1894 |
| Mary Mulligan | Daughter | — | 10 | ~1930 |
| Bernard Mulligan | Head | — | 50 | ~1890 |
| Kathryn Mulligan | Daughter | — | 16 | ~1924 |
| Harold Mulligan | Son | — | 19 | ~1921 |
| Bernard Mulligan | Son | — | 20 | ~1920 |
| Elizabeth Mulligan | Daughter | — | 8 | ~1932 |
| Katherine Brennan | Other | — | 74 | ~1866 |
Census Appearances
1930
Los Angeles, …
Daughter, age
Los Angeles, California · implied b. ~1930 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mulligan |
| Given Name | Mary J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Colorado |
| Mother's Birthplace | Colorado |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Los-Angeles-County, California
Daughter, age 10
Los-Angeles-County, California · implied b. ~1930 — 9 household members
| Surname | Mulligan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Los Angeles City |
| 1935 Residence (County) | Los Angeles |
| Highest Grade | 4 |
| 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 Mary Mulligan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mulligan
Daughter · 1940 · age 10 · b. ~1930 · California
★ You are viewing this record
Sibling
Kathryn Mulligan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Mulligan
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Mulligan
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harold Mulligan
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Mulligan
Sibling · 1940 · age 8
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
40 people indexed on this census page (nara:1940:m-t0627-00418-00386)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Samuel Nazarian | 15 | Daughter | — | California |
| 2 | Victoria Nazarian | 9 | Daughter | — | California |
| 3 | Bernard J. Mulligan | 50 | Head | Mortician | Colorado |
| 4 | Elizabeth Mulligan | 46 | Wife | — | Colorado |
| 5 | Bernard J. Jr. Mulligan | 20 | Son | Salesman | Colorado |
| 6 | Harold W. Mulligan | 19 | Son | Cutter | Colorado |
| 7 | Kathryn Mulligan | 16 | Daughter | — | Colorado |
| 8 | Patricia Mulligan | 13 | Daughter | — | Colorado |
| 9 | Mary Mulligan THIS PERSON | 10 | Daughter | — | California |
| 10 | Elizabeth Mulligan | 8 | Daughter | — | California |
| 11 | Katherine Brennan | 74 | Mother-in-law | — | Colorado |
| 12 | Harvey S. Ames | 39 | Head | Jobber | California |
| 13 | Lena Ames | 39 | Wife | — | California |
| 14 | Herbert Ames | 11 | Son | — | California |
| 15 | Wilbert Ames | 9 | Son | — | California |
| 16 | Robert Ames | 6 | Son | — | California |
| 17 | Edith Ames | 4 | Daughter | — | California |
| 18 | Sook Choon Ames | 73 | Father | Proprietor | Korea |
| 19 | Austin C. Bowker | 46 | Head | — | Iowa |
| 20 | Alice A. Bowker | 44 | Wife | — | Nebraska |
| 21 | Loraine Bowker | 29 | Daughter | Beauty Operator | Nebraska |
| 22 | William Albin | 42 | Nephew | Salesman | Iowa |
| 23 | Laverna Albin | 34 | Nephew's wife | — | Nebraska |
| 24 | Maxine Albin | 10 | Nephew's daughter | — | Nebraska |
| 25 | Louis C. Ortega | 64 | Head | — | Arizona |
| 26 | Josephine Ortega | 55 | Wife | — | Arizona |
| 27 | Franklyn Ortega | 27 | Son | Laborer | Arizona |
| 28 | Carrie Ortega | 21 | Daughter | Seamstress | California |
| 29 | Josephine Ortega | 16 | Daughter | — | California |
| 30 | Wilfred E. Brockett | 41 | Son-in-law | Cutter Operator | California |
| 31 | Rose Brockett | 26 | Daughter | — | California |
| 32 | John H. Polly | 66 | Head | Insurance Broker | Illinois |
| 33 | Nora A. Polly | 68 | Wife | — | Missouri |
| 34 | Florence E. Polly | 33 | Daughter | Teacher | California |
| 35 | Blanche V. De Sommer | 65 | Head | — | Iowa |
| 36 | Ivan J. De Sommer | 30 | Son | Shipping Clerk | Colorado |
| 37 | Anthony Walker | 39 | Head | Gardener | England |
| 38 | Dorothy Walker | 31 | Wife | Machine Operator | Illinois |
| 39 | Barbara A. Walker | 9 | Daughter | — | California |
| 40 | Fred E. Ricard | 35 | Head | Sign Contractor | 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)