MG
Mary Gross — 1930 US Census Record
Linked across censuses1930 United States Federal Census · St Louis, Missouri
Our Model Tree links this Mary Gross across the 1930 and 1940 US Censuses in St Louis, Missouri (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 10-person household.
Age 9
b. ~1921
Female
Daughter
Born: Missouri
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | St Louis, Missouri |
| Surname | Gross |
| Given Name | Mary S. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Missouri |
| Age at First Marriage | 9 |
| Father's Birthplace | New Mexico |
| Mother's Birthplace | Missouri |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | Normandy |
| Est. Birth Year | ~1921 |
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 |
|---|---|---|---|---|
| Arthur Gross | Daughter | — | 11 | ~1919 |
| Mary Gross | Spouse | — | 38 | ~1892 |
| Edward Gross | Head | — | 40 | ~1890 |
| Ann Gross | Daughter | — | 3 | ~1927 |
| Gerald Gross | Son | — | 21 | ~1909 |
| Edward Gross | Son | — | 15 | ~1915 |
| Mary Gross | Daughter | — | 9 | ~1921 |
| Robert Gross | Son | — | 7 | ~1923 |
| Thomas Gross | Son | — | 13 | ~1917 |
| Scott Gross | Son | — | 5 | ~1925 |
Census Appearances
1930
St Louis, …
Daughter, age 9
St Louis, Missouri · implied b. ~1921 — 10 household members
| Surname | Gross |
| Given Name | Mary S. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Missouri |
| Age at First Marriage | 9 |
| Father's Birthplace | New Mexico |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Jersey-County, Illinois
Spouse, age 19
Jersey-County, Illinois · implied b. ~1921 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gross |
| Given Name | Marcella |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | Mississippi Township |
| 1935 Residence (County) | Jersey |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 9 · b. ~1921 · Missouri
★ You are viewing this record
Sibling
Thomas Gross
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Gross
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Scott Gross
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arthur Gross
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Gross
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Gross
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Gross
Sibling · 1930 · age 7
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 — St Louis, Missouri
Open full size
1930 US Federal Census — St Louis, Missouri
Page Contents
50 people indexed on this census page (ia:1930:missouricensus00reel1225:0859)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Vincent Liesman | 4 | Son | None | Missouri |
| 52 | Doris Liesman | 3 | Daughter | None | Missouri |
| 53 | Arthur Liesman | 2 | Son | None | Missouri |
| 54 | Joseph Liesman | 73 | Father-in-law | None | Missouri |
| 55 | John M. Wilson | 25 | Head | Salesman | Ohio |
| 56 | Helen J. Wilson | 22 | Wife | None | Ohio |
| 57 | John Wilson | 5 | Son | None | Louisiana |
| 58 | Joan Wilson | 1 | Daughter | None | Missouri |
| 59 | Catherine Prucellous | 16 | Servant | Servant | Ohio |
| 60 | Stella Wilson | 59 | Mother | None | Porto Rico |
| 61 | James J. O'Hara | 64 | Head | Caddy Master | Louisiana |
| 62 | Catherine O'Hara | 60 | Wife | None | Missouri |
| 63 | James F. O'Hara | 39 | Son | Carpenter | Missouri |
| 64 | Joseph H. O'Hara | 34 | Son | Auto Helper | Missouri |
| 65 | Dennis Breshnahan | 45 | Brother-in-law | Laborer | Missouri |
| 66 | Mary E. Mcandrew | 62 | Sister-in-law | None | Missouri |
| 67 | Celestra Mcandrew | 30 | Niece | Stenographer | Missouri |
| 68 | Wesley L. Harris | 37 | Head | Painter | Illinois |
| 69 | Irene Harris | 31 | Wife | None | Missouri |
| 70 | Lois Harris | 4 | Daughter | None | Missouri |
| 71 | Wesley Harris | 2 | Son | None | Missouri |
| 72 | James Harris | 0 | Son | None | Missouri |
| 73 | Louis Cometzky | 60 | Head | Retired | Germany |
| 74 | Lucile Kirchner | 21 | Daughter | Stenographer | Missouri |
| 75 | Minnie Linnemann | 47 | Daughter | None | Missouri |
| 76 | William Linnemann | 49 | Son-in-law | Ship. Clerk | Missouri |
| 77 | Louis Kirchner | 18 | Grandson | None | Missouri |
| 78 | Edward Gross | 40 | Head | President | New Mexico |
| 79 | Mary S. Gross | 38 | Wife | None | Missouri |
| 80 | Gerald Gross | 21 | Son | File Clerk | Missouri |
| 81 | Edward Jr. Gross | 15 | Son | None | Missouri |
| 82 | Thomas Gross | 13 | Son | None | Missouri |
| 83 | Arthur Gross | 11 | Daughter | None | Missouri |
| 84 | Mary S. Gross THIS PERSON | 9 | Daughter | None | Missouri |
| 85 | Robert Gross | 7 | Son | None | Missouri |
| 86 | Scott Gross | 5 | Son | None | Missouri |
| 87 | Ann Gross | 3 | Daughter | None | Missouri |
| 88 | E. Battle Smith | 51 | Head | Chemist | Missouri |
| 89 | Mary Smith | 50 | Wife | None | Missouri |
| 90 | Caroline Smith | 17 | Daughter | None | Missouri |
| 91 | Betty J. Smith | 15 | Daughter | None | Missouri |
| 92 | Battle Smith | 11 | Son | None | Missouri |
| 93 | Robert H. Smith | 8 | Daughter | None | Missouri |
| 94 | Margaret Smith | 4 | Daughter | None | Missouri |
| 95 | Vigil Staiti | 22 | Servant | Servant | Missouri |
| 96 | Nora Hall | 52 | Servant | Cook | Missouri |
| 97 | William Campbell | 62 | Head | Lawyer | Missouri |
| 98 | Angela Campbell | 56 | Wife | None | Missouri |
| 99 | David Werner | 48 | Head | Hotel | Missouri |
| 100 | Julia Werner | 44 | Wife | None | Missouri |
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)