MR
Mary Rossi — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Grundy-County, Illinois
Our Model Tree links this Mary Rossi across the 1930 and 1940 US Censuses in Grundy-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 4-person household.
Age 12
b. ~1928
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Grundy-County, Illinois |
| Surname | Rossi |
| Given Name | Mary Lou |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Morris City |
| 1935 Residence (County) | Grundy |
| Additional Details | |
| Industry | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Morris City |
| Est. Birth Year | ~1928 |
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 |
|---|---|---|---|---|
| Mary Rossi | Daughter | — | 12 | ~1928 |
| Lidia Rossi | Spouse | — | 32 | ~1908 |
| Frank Rossi | Head | — | 40 | ~1900 |
| Norma Rossi | Daughter | — | 3 | ~1937 |
Census Appearances
1930
Grundy, Illinois
Daughter, age 2
Grundy, Illinois · implied b. ~1928 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Rossi |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Grundy-County, Illinois
Daughter, age 12
Grundy-County, Illinois · implied b. ~1928 — 4 household members
| Surname | Rossi |
| Given Name | Mary Lou |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Morris City |
| 1935 Residence (County) | Grundy |
| Industry | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Rossi across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Rossi
Daughter · 1940 · age 12 · b. ~1928 · Illinois
★ You are viewing this record
Sibling
Norma Rossi
Sibling · 1940 · age 3
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 — Grundy-County, Illinois
Open full size
1940 US Federal Census — Grundy-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00809-00442)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert G. Bolton | 12 | son | — | N. Dakota |
| 42 | Dolores M. Bolton | 10 | daughter | — | Illinois |
| 43 | Dana J. Bolton | 7 | daughter | — | Illinois |
| 44 | Wesley E. Bolten | 3 | son | — | Illinois |
| 45 | Alice Belle | 76 | head | — | Illinois |
| 46 | Orango M. Nelson | 29 | head | Laborer | Illinois |
| 47 | Lucille G. Nelson | 27 | wife | — | Indiana |
| 48 | Lois J. Nelson | 9 | daughter | — | Illinois |
| 49 | Alice C. Nelson | 6 | daughter | — | Illinois |
| 50 | Muriel D. Jenkins | 20 | boarder | Laborer | Illinois |
| 51 | Frank Rossi | 40 | head | Coal Digger | Illinois |
| 52 | Lidia S. Rossi | 32 | wife | — | Illinois |
| 53 | Mary Lou Rossi THIS PERSON | 12 | daughter | — | Illinois |
| 54 | Norma J. Rossi | 3 | daughter | — | Illinois |
| 55 | William H. Carpenter | 57 | head | Truck Driver | Illinois |
| 56 | Martha S. Carpenter | 49 | wife | — | Illinois |
| 57 | Ray Kjellman | 31 | head | Carpenter | Illinois |
| 58 | Ernestine Kjellman | 27 | wife | — | Illinois |
| 59 | Robert Leroy Kjellman | 4 | son | — | Illinois |
| 60 | John Rossi | 55 | head | Locomotive Fireman | Illinois |
| 61 | Hazel Rossi | 49 | wife | — | Illinois |
| 62 | Edward J. Rossi | 18 | son | — | Illinois |
| 63 | Beatrice J. Rossi | 16 | daughter | — | Illinois |
| 64 | Harriet M. Rossi | 11 | daughter | — | Illinois |
| 65 | Jack D. Munger | 37 | head | Finisher | Illinois |
| 66 | Katherine A. Munger | 24 | wife | — | Illinois |
| 67 | Doris J. Munger | 4 | daughter | — | Illinois |
| 68 | Alice M. Munger | 2 | daughter | — | Illinois |
| 69 | Herbert Anderson | 42 | lodger | Express Agent | Iowa |
| 70 | Ray E. Benson | 58 | head | Engine Watchman | Illinois |
| 71 | Grace V. Benson | 46 | wife | — | England |
| 72 | Donald R. Benson | 23 | son | Stock Clerk | Illinois |
| 73 | Norman G. Benson | 15 | daughter | — | Illinois |
| 74 | Harold H. Kutler | 36 | head | Electrical Mnt. | Illinois |
| 75 | Metella Kutler | 33 | wife | — | N. Dakota |
| 76 | Wesley Rosenbrock | 44 | head | Engineer Helper | Illinois |
| 77 | Edna M. Rosenbrock | 43 | wife | — | Arkansas |
| 78 | Lawrence J. Rosenbrock | 15 | son | — | Illinois |
| 79 | Laverne Rosenbrock | 11 | daughter | — | Illinois |
| 80 | Charles J. Szymanski | 62 | head | Laborer | Illinois |
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)