MR
Mary Ross — 1940 US Census Record
Model Tree available1940 United States Federal Census · Davis-County, Utah
Our Model Tree links this Mary Ross across the 1920, 1930 and 1940 US Censuses in Davis-County, Utah (XGBoost, ~Confirmed), with identified parents Thomas & Irvine — first a daughter (b.~1912), then head of a 4-person household.
Age 28
b. ~1912
Female
Daughter
Born: Utah
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Davis-County, Utah |
| Surname | Ross |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Utah |
| 1935 Residence (City) | West Pt Election Precinct 5 N 2 W |
| 1935 Residence (County) | Davis |
| Additional Details | |
| Occupation | Labor |
| Class of Worker | PW |
| Hours Worked | 0 |
| Income (1939) | 76 |
| Highest Grade | No 10 |
| 1935 Residence | Same place |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
| Occupation | Labor |
| Township / Ward | West Pt Election Precinct 5 N 2 W |
| Est. Birth Year | ~1912 |
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 Ross | Daughter | — | 28 | ~1912 |
| Maude Ross | Daughter | — | 33 | ~1907 |
| Nancie Ross | Head | — | 35 | ~1905 |
| Luman Ross | Son | — | 31 | ~1909 |
Census Appearances
1920
Davis, Utah
Daughter, age 9
Davis, Utah · implied b. ~1911 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Ross |
| Given Name | Mary T. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Utah |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1930
Davis, Utah
Daughter, age 19
Davis, Utah · implied b. ~1911 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Ross |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Utah |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Occupation | Seamstress |
| Industry | Knitting Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1940
Davis-County, Utah
Daughter, age 28
Davis-County, Utah · implied b. ~1912 — 4 household members
| Surname | Ross |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Utah |
| 1935 Residence (City) | West Pt Election Precinct 5 N 2 W |
| 1935 Residence (County) | Davis |
| Occupation | Labor |
| Class of Worker | PW |
| Hours Worked | 0 |
| Income (1939) | 76 |
| Highest Grade | No 10 |
| 1935 Residence | Same place |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
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 Ross across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Ross (~0.92 confidence) and father Irvine Ross (~0.92 confidence) and mother Mary Ross (~0.92 confidence) and mother Nancie Ross (~0.60 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.84
Father
Thomas Ross
b. ~1867
Source father
● Household
· direct · ~0.92
Father
Irvine Ross
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Mary Ross
b. ~1875
Source mother
● Household
· direct · ~0.92
Mother
Nancie Ross
b. ~1905
Source mother
● Household
· direct · ~0.6
This person
Anchor record
Mary Ross
Daughter · 1940 · age 28 · b. ~1912 · Utah
★ You are viewing this record
Sibling
Luman Ross
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maude Ross
Sibling · 1940 · age 33
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 — Davis-County, Utah
Open full size
1940 US Federal Census — Davis-County, Utah
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04212-00480)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | J. B. Ross | 40 | Head | Farmer | Utah |
| 2 | Henitt Ross | 33 | Wife | House | Utah |
| 3 | Joyce Ross | 4 | Daughter | — | Utah |
| 4 | Irine Ross | 1 | Daughter | — | Utah |
| 5 | Violet Ross | 69 | Head | House | Utah |
| 6 | Nancie Ross | 35 | Head | House Keeper | Utah |
| 7 | Maude R. Ross | 33 | Daughter | Labor | Utah |
| 8 | Luman Ross | 31 | Son | Farmer | Utah |
| 9 | Mary Ross THIS PERSON | 28 | Daughter | Labor | Utah |
| 10 | Melvin Muir | 22 | Head | Trucker | Utah |
| 11 | Flora Muir | 29 | Wife | House | Utah |
| 12 | Allen Muir | 3 | Son | — | Utah |
| 13 | Lorin Freur | 44 | Head | Farmer | Utah |
| 14 | Ema Freur | 42 | Wife | House | Utah |
| 15 | Betty Freur | 18 | Daughter | — | Utah |
| 16 | Billy Freur | 16 | Son | — | Utah |
| 17 | Henry Smith | 69 | Head | Farmer | Utah |
| 18 | Nettie Smith | 63 | Wife | House | Utah |
| 19 | Mary Smith | 36 | Daughter | Teacher School | Utah |
| 20 | George Towers | 55 | Head | Farmer | Utah |
| 21 | Ivy Towers | 48 | Wife | House | Utah |
| 22 | Carl Towers | 15 | Son | — | Utah |
| 23 | Elma Towers | 11 | Daughter | — | Utah |
| 24 | Howard Towers | 9 | Son | — | Utah |
| 25 | Leet H. Parker | 45 | Head | Farmer | Utah |
| 26 | Mary Parker | 44 | Wife | House | Utah |
| 27 | Wilma Parker | 9 | Daughter | — | Utah |
| 28 | Wilmer Parker | 9 | Son | — | Utah |
| 29 | Mary Parker | 11 | Daughter | — | Utah |
| 30 | Shikazo Yamashita | 36 | Head | Farmer | Japan |
| 31 | Satsy Yamashita | 26 | Wife | House | Idaho |
| 32 | Hiroshi Yamashita | 6 | Son | — | Utah |
| 33 | Kay Yamashita | 4 | Son | — | Utah |
| 34 | Emiko Yamashita | 1 | Daughter | — | Utah |
| 35 | Matshujiro Yamashita | 63 | Head | Farmer | Japan |
| 36 | Tome Yamashita | 58 | Wife | Farmer | Japan |
| 37 | Aki Yamashita | 21 | Son | — | Utah |
| 38 | Shichao Yamashita | 19 | Son | — | Utah |
| 39 | George Yamashita | 17 | Son | — | Utah |
| 40 | Joe Yamashita | 16 | Son | — | Utah |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 4 parents
~0.84
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)