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Mary Griffith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Mary Griffith across the 1920, 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed), with identified parents Milo & Mildred — first a daughter (b.~1905), then head of a 4-person household.
Age 35
b. ~1905
Female
Daughter
Born: Nebraska
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Griffith |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Nebraska |
| 1935 Residence (City) | Los Angeles City |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Occupation | Housemaid |
| Industry | Private Family |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 520 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
| Occupation | Housemaid |
| Township / Ward | Los Angeles City |
| Est. Birth Year | ~1905 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Griffith | Daughter | — | 26 | ~1914 |
| Mary Griffith | Daughter | — | 35 | ~1905 |
| Mildred Griffith | Head | — | 62 | ~1878 |
| Harold Griffith | Son | — | 29 | ~1911 |
Census Appearances
1920
Los Angeles, …
Daughter, age 15
Los Angeles, California · implied b. ~1905 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffith |
| Given Name | Mary T. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Nebraska |
| Father's Birthplace | Nebraska |
| Mother's Birthplace | Ohio |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1930
Los Angeles, …
Daughter, age 26
Los Angeles, California · implied b. ~1904 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffith |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Nebraska |
| Father's Birthplace | Nebraska |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1940
Los-Angeles-County, California
Daughter, age 35
Los-Angeles-County, California · implied b. ~1905 — 4 household members
| Surname | Griffith |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Nebraska |
| 1935 Residence (City) | Los Angeles City |
| 1935 Residence (County) | Los Angeles |
| Occupation | Housemaid |
| Industry | Private Family |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 520 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
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 Griffith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Milo Griffith (~0.92 confidence) and mother Mildred Griffith (~0.92 confidence) and mother Mildred Griffith (~0.92 confidence) and mother Mildred Griffith (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Milo Griffith
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Mildred Griffith
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Mildred Griffith
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Mildred Griffith
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Griffith
Daughter · 1940 · age 35 · b. ~1905 · California
★ You are viewing this record
Sibling
Harold Griffith
Sibling · 1940 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Griffith
Sibling · 1940 · age 26
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-t0627-00422-00514)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Hollaway | 19 | Lodger | Moulder | Tennessee |
| 2 | Ralph Davis | 26 | Lodger | Core-Setter | Georgia |
| 4 | Louis Ziskind | 31 | Head | Social Worker | Maryland |
| 5 | Edith Ziskind | 31 | Wife | Clerical Aid | California |
| 6 | William Davidson | 74 | Head | — | Ohio |
| 7 | Laura C. Davidson | 50 | Wife | — | California |
| 8 | Jessie E. Barber | 56 | Sister-in-law | — | California |
| 9 | Alex N. Weir | 48 | Head | Locomotive Engineer | California |
| 10 | Edythe C. Weir | 48 | Wife | — | Pennsylvania |
| 11 | Charlotte G. Weir | 16 | Daughter | — | California |
| 12 | Grover C. Sullivan | 54 | Head | Structural Engineer | Illinois |
| 13 | Ella E. Sullivan | 52 | Wife | — | Illinois |
| 14 | Lionel W. Sullivan | 32 | Son | Proprietor | Oklahoma |
| 15 | Wayne L. Dies | 29 | Head | Distributor | Iowa |
| 16 | Helen F. Dies | 33 | Wife | Bookkeeper | Iowa |
| 17 | Mary A. Young | 53 | Mother | — | Iowa |
| 18 | Mildred Griffith | 62 | Head | — | Ohio |
| 19 | Harold N. Griffith | 29 | Son | Painter | Nebraska |
| 20 | Mary J. Griffith THIS PERSON | 35 | Daughter | Housemaid | Nebraska |
| 21 | Dorothy M. Griffith | 26 | Daughter | Clerk | Nebraska |
| 22 | Roy Millsap | 61 | Head | — | Iowa |
| 23 | Gertrude M. Millsap | 54 | Wife | Department Manager | Iowa |
| 24 | Lloyd E. Conaway | 36 | Head | Electrician | Iowa |
| 25 | Alice M. Conaway | 37 | Wife | — | Iowa |
| 26 | Alice D. Conaway | 13 | Daughter | — | Iowa |
| 27 | John Biddick | 70 | Father-in-law | — | Iowa |
| 28 | Amy L. Biddick | 63 | Mother-in-law | — | Iowa |
| 29 | Frances C. Grecian | 36 | Sister-in-law | Housework | Iowa |
| 30 | Charles L. Grecian | 13 | Nephew | — | Iowa |
| 31 | James H. Grecian | 7 | Nephew | — | Iowa |
| 32 | Sidney R. Brewster | 23 | Cousin | Farmer | Iowa |
| 33 | Leora Sharkey | 66 | Head | — | Indiana |
| 34 | James Maynard | 61 | Head | Engineering | England |
| 35 | Nellie Lawlor | 77 | Head | — | Illinois |
| 36 | Margaret I. Lawlor | 55 | Daughter | — | Pennsylvania |
| 37 | Frank J. Lawlor | 48 | Son | Salesman | Illinois |
| 38 | Catherine Taylor | 57 | Daughter | — | Illinois |
| 39 | Charles Henderson | 26 | Head | Deputy Clerk | Kansas |
| 40 | Wella D. Henderson | 24 | Wife | — | Missouri |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)