ML
Mary Lennon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Mary Lennon across the 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 8-person household.
Age 11
b. ~1929
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Lennon |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Venice City |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Venice City |
| Est. Birth Year | ~1929 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Thomas Chapman | Other | — | 26 | ~1914 |
| Moana Lennon | Other | — | 44 | ~1896 |
| Mary Lennon | Daughter | — | 11 | ~1929 |
| Thomas Lennon | Son | — | 22 | ~1918 |
| Betty Lennon | Head | — | 33 | ~1907 |
| Patrick Lennon | Son | — | 13 | ~1927 |
| Robert Lennon | Son | — | 21 | ~1919 |
| Theodore Lennon | Son | — | 19 | ~1921 |
Census Appearances
1930
Los Angeles, …
Daughter, age 1
Los Angeles, California · implied b. ~1929 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lannon |
| Given Name | Mary V. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Nebraska |
| Mother's Birthplace | Michigan |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Los-Angeles-County, California
Daughter, age 11
Los-Angeles-County, California · implied b. ~1929 — 8 household members
| Surname | Lennon |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Venice City |
| 1935 Residence (County) | Los Angeles |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| 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 Lennon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Lennon
Daughter · 1940 · age 11 · b. ~1929 · California
★ You are viewing this record
Sibling
Theodore Lennon
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patrick Lennon
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Lennon
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Lennon
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 — Los-Angeles-County, California
Open full size
1940 US Federal Census — Los-Angeles-County, California
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-00411-00349)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Arthur J. Brunt | 25 | Head | — | Michigan |
| 42 | May Brunt | 24 | Wife | — | Ohio |
| 44 | Harold J. Clark | 46 | Head | Business Agent | Germany |
| 45 | Marguerite K. Clark | 40 | Wife | — | Iowa |
| 46 | Ruth M. Clark | 14 | Daughter | — | California |
| 47 | Edward J. Shives | 88 | Head | — | Ohio |
| 48 | Bertha Biggs | 65 | Head | Teacher | Kansas |
| 49 | Della B. Biggs | 70 | Lodger | — | Illinois |
| 50 | Fay V. Fields | 51 | Head | — | Kansas |
| 51 | Fay Fields | 23 | Daughter | Actress | California |
| 52 | Charles H. Barnes | 76 | Lodger | — | Ohio |
| 53 | Celia B. Barnes | 79 | Lodger | — | Indiana |
| 54 | Fero Williams | 37 | Head | Accountant | Texas |
| 55 | Mary F. Williams | 35 | Wife | — | Texas |
| 56 | Joanne Williams | 10 | Daughter | — | California |
| 57 | Nina E. Moody | 28 | Housekeeper | Maid | Texas |
| 58 | Robert R. Galloway | 30 | Head | Gardener | Mississippi |
| 59 | Mildred A. Galloway | 25 | Wife | — | Oregon |
| 60 | Linda Galloway | 1 | Daughter | — | California |
| 61 | Edward A. Crandall | 59 | Head | Teacher | Indiana |
| 62 | Ella M. Crandall | 51 | Wife | Teacher | Texas |
| 64 | Warren C. Conrad | 54 | Head | Assistant Superintendent | New York |
| 65 | Wilhelmina Conrad | 58 | Wife | — | Illinois |
| 66 | Kenneth R. Hanna | 55 | Head | — | California |
| 67 | Jesse E. Spangler | 47 | Lodger | Salesman | Pennsylvania |
| 68 | Betty Lennon | 33 | Head | — | Germany |
| 69 | Thomas J. Lennon | 22 | Son | Mechanic | California |
| 70 | Robert B. Lennon | 21 | Son | Laborer | California |
| 71 | Theodore R. Lennon | 19 | Son | Laborer | California |
| 72 | Patrick A. Lennon | 13 | Son | — | California |
| 73 | Mary E. Lennon THIS PERSON | 11 | Daughter | — | California |
| 74 | Moana Lennon | 44 | Sister | — | Wisconsin |
| 75 | Thomas Chapman | 26 | Lodger | Mechanic | Arkansas |
| 76 | Dale Gladstone | 21 | Head | — | Pennsylvania |
| 77 | Rupert J. Pazzonelli | 35 | Head | Fireman | Idaho |
| 78 | Rose Pazzonelli | 32 | Wife | — | California |
| 79 | Patricia L. Walker | 13 | Daughter | — | California |
| 80 | Nora L. Pazzonelli | 6 | Daughter | — | 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)