MG
Mary Gross — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Los Angeles, California
Our Model Tree links this Mary Gross across the 1930 and 1940 US Censuses in Los Angeles, California (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 10-person household.
Age 3
b. ~1927
Female
Daughter
Born: California
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Los Angeles, California |
| Surname | Gross |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Additional Details | |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Florence Precinct |
| Est. Birth Year | ~1927 |
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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Vincent Gross | Son | — | 4 | ~1926 |
| Donald Gross | Son | — | 6 | ~1924 |
| Olive Gross | Other | — | 36 | ~1894 |
| William Gross | Son | — | 8 | ~1922 |
| Mary Gross | Daughter | — | 3 | ~1927 |
| Alfred Gross | Head | — | 45 | ~1885 |
| Oliver Gross | Son | — | 10 | ~1920 |
| George Gross | Son | — | 13 | ~1917 |
| Thomas Gross | Son | — | 12 | ~1918 |
| Anna Kachelmeyer | Other | — | 59 | ~1871 |
Census Appearances
1930
Los Angeles, …
Daughter, age 3
Los Angeles, California · implied b. ~1927 — 10 household members
| Surname | Gross |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Los-Angeles-County, California
Other, age 14
Los-Angeles-County, California · implied b. ~1926 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gross |
| Given Name | Margaret |
| Relationship to Head | Helper |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Alturas |
| 1935 Residence (County) | Modoc |
| Occupation | Housekeeper |
| Industry | Private home |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 86 |
| Highest Grade | 5 |
| 1935 Residence | California |
| 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 Gross across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Gross
Daughter · 1930 · age 3 · b. ~1927 · California
★ You are viewing this record
Sibling
William Gross
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Gross
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Oliver Gross
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Gross
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Gross
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vincent Gross
Sibling · 1930 · age 4
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
1930 US Federal Census — Los Angeles, California
Open full size
1930 US Federal Census — Los Angeles, California
Page Contents
50 people indexed on this census page (ia:1930:californiacensus00reel172:0326)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Fred Dennis | 31 | Head | Calendar | Indiana |
| 2 | Florence Dennis | 33 | Wife-H | — | Michigan |
| 3 | Laverne Hoard | 15 | Son-L | — | Michigan |
| 4 | Harry C. Phelps | 48 | Head | Cabinet Maker | Illinois |
| 5 | Rose Phelps | 44 | Wife-H | — | Arkansas |
| 6 | Clarice B. Phelps | 18 | Daughter | — | California |
| 7 | Robert A. Frick | 55 | Head | Carpenter | Kansas |
| 8 | Mattie L. Frick | 55 | Wife-H | — | Kansas |
| 9 | Leo L. Hopper | 42 | Head | Repairman | Ohio |
| 10 | Ruth V. Hopper | 36 | Wife-H | — | Indiana |
| 11 | Muriel L. Hopper | 15 | Daughter | — | Illinois |
| 12 | William J. Mcneil | 64 | Head | Laborer | Canada-English |
| 13 | Mary B. Mcneil | 60 | Wife-H | — | Irish Free State |
| 14 | Howard C. Smith | 46 | Head | Lumberman | Ohio |
| 15 | Lucy Smith | 50 | Wife-H | — | Ohio |
| 16 | David L. Mccullough | 52 | Bro-in-law | Carpenter | Ohio |
| 17 | John V. Williams | 33 | Head | — | Illinois |
| 18 | Martha A. Williams | 19 | Wife-H | — | Illinois |
| 19 | Harry Seidler | 54 | Head | Awn Maker | Austria |
| 20 | Belle Seidler | 53 | Wife-H | — | Austria |
| 21 | Lillian Seidler | 19 | Daughter | — | New York |
| 22 | Wally Seidler | 10 | Son | — | New Jersey |
| 23 | Jacob W. Stake | 67 | Head | Carpenter | Pennsylvania |
| 24 | Della Stake | 62 | Wife-H | — | Michigan |
| 25 | Virgil H. Fuerst | 31 | Head | Truck Driver | Kansas |
| 26 | Alta P. Fuerst | 33 | Wife-H | — | Wisconsin |
| 27 | George J. Culbert | 27 | Head | Foreman | New Hampshire |
| 28 | Harriet M. Culbert | 24 | Wife-H | — | New Hampshire |
| 29 | Donald G. Culbert | 4 | Son | — | California |
| 30 | Alfred H. Gross | 45 | Head | Draftsman | Wisconsin |
| 31 | Olive M. Gross | 36 | Wife-H | — | Wisconsin |
| 32 | George F. Gross | 13 | Son | — | Wisconsin |
| 33 | Thomas J. Gross | 12 | Son | — | Wisconsin |
| 34 | Oliver A. Gross | 10 | Son | — | Wisconsin |
| 35 | William J. Gross | 8 | Son | — | Wisconsin |
| 36 | Donald J. Gross | 6 | Son | — | California |
| 37 | Vincent H. Gross | 4 | Son | — | California |
| 38 | Mary J. Gross THIS PERSON | 3 | Daughter | — | California |
| 39 | Anna M. Kachelmeyer | 59 | Mother-in-law | Practical Nurse | Germany |
| 40 | John A. Bodene | 47 | Head | Glass Worker | Minnesota |
| 41 | Lovie Bodene | 37 | Wife-H | — | Texas |
| 42 | John A. Jr. Bodene | 15 | Son | — | Kansas |
| 43 | Thelma Bodene | 12 | Daughter | — | California |
| 44 | Karl R. Bodene | 1 | Son | — | California |
| 45 | Fred R. Lucchesia | 23 | Head | Watchman | California |
| 46 | Josephine Lucchesia | 10 | Wife-H | — | California |
| 47 | Fred F. Lucchesia | 2 | Son | Truck Driver | California |
| 48 | Rose A. Caldwell | 41 | Head | — | Canada |
| 49 | Angus G. Caldwell | 16 | Son | — | California |
| 50 | Thelma A. Caldwell | 16 | Son | — | California |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)