MJ
Mary Jennings — 1940 US Census Record
Model Tree available1940 United States Federal Census · Salt-Lake-County, Utah
Our Model Tree links this Mary Jennings across the 1920, 1930 and 1940 US Censuses in Salt-Lake-County, Utah (XGBoost, ~Confirmed), with identified parents Joseph & Regina — first a spouse (b.~1900), then head of a 3-person household.
Age 40
b. ~1900
Female
Spouse
Born: Utah
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Salt-Lake-County, Utah |
| Surname | Jennings |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Utah |
| 1935 Residence (City) | Salt Lake City |
| 1935 Residence (County) | Salt Lake |
| Additional Details | |
| Highest Grade | C 1 |
| 1935 Residence | Same House |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
| Township / Ward | Salt Lake City |
| Est. Birth Year | ~1900 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Jennings | Daughter | — | 20 | ~1920 |
| Harold Jennings | Head | — | 41 | ~1899 |
| Mary Jennings | Spouse | — | 40 | ~1900 |
Census Appearances
1920
Salt Lake, …
Daughter, age 21
Salt Lake, Utah · implied b. ~1899 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jennings |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Utah |
| Father's Birthplace | Utah |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1930
Salt Lake, …
Spouse, age 31
Salt Lake, Utah · implied b. ~1899 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jennings |
| Given Name | Mary C. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Utah |
| Age at First Marriage | 20 |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1940
Salt-Lake-County, Utah
Spouse, age 40
Salt-Lake-County, Utah · implied b. ~1900 — 3 household members
| Surname | Jennings |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Utah |
| 1935 Residence (City) | Salt Lake City |
| 1935 Residence (County) | Salt Lake |
| Highest Grade | C 1 |
| 1935 Residence | Same House |
| 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 Jennings across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joseph Larsen (~0.92 confidence) and mother Regina Larsen (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Larsen
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Regina Larsen
b. ~1868
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Jennings
Spouse · 1940 · age 40 · b. ~1900 · Utah
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Salt-Lake-County, Utah
Open full size
1940 US Federal Census — Salt-Lake-County, Utah
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-04223-00482)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ross M. Richards | 42 | Head | Auditor | Utah |
| 42 | Alzie Richards | 42 | Wife | — | Utah |
| 43 | Melvin R. Richards | 15 | Son | — | Utah |
| 44 | John B. Richards | 12 | Son | — | Utah |
| 45 | Lois Ann Richards | 7 | Daughter | — | Utah |
| 46 | T. Alan Richards | 5 | Son | — | Utah |
| 47 | Leslie J. Batley | 42 | Head | Salesman | Illinois |
| 48 | Marian Batley | 41 | Wife | — | Iowa |
| 49 | Leslie J. Jr. Batley | 13 | Son | — | Utah |
| 50 | Robert F. Batley | 9 | Son | — | Utah |
| 51 | Stella Lawson | 25 | Servant | Maid | Utah |
| 52 | Calvin Rehle | 33 | Head | Attorney | Utah |
| 53 | Grace Rehle | 34 | Wife | — | Utah |
| 54 | Marilyn Rehle | 2 | Daughter | — | Utah |
| 55 | Marcia Rehle | 1 | Daughter | — | Utah |
| 56 | Beverly Tife | 19 | Servant | Maid | Utah |
| 57 | Gilbert K. Ludwig | 36 | Head | Sales Engineer | Ohio |
| 58 | Isabelle Ludwig | 33 | Wife | — | Colorado |
| 59 | Gilbert K. Jr. Ludwig | 0 | Son | — | Utah |
| 60 | Harry L. Hoaglund | 60 | Head | Manager | New York |
| 61 | Clara Hoaglund | 50 | Wife | — | Pennsylvania |
| 62 | James A. Hoaglund | 26 | Son | Reporter | Pennsylvania |
| 63 | Harry L. Jr. Hoaglund | 22 | Son | — | Utah |
| 64 | Frank Hoaglund | 22 | Son | — | Utah |
| 65 | Joseph Hoaglund | 19 | Son | — | Missouri |
| 67 | Frederick Munker | 50 | Head | General Manager | Wisconsin |
| 68 | Eva E. Munker | 42 | Wife | — | Idaho |
| 69 | Grace Munker | 18 | Daughter | — | Idaho |
| 70 | Ernest J. Osterloh | 45 | Head | Co-Partner | Montana |
| 71 | Irene Osterloh | 43 | Wife | — | Utah |
| 72 | George P. Osterloh | 21 | Son | — | Utah |
| 73 | Ralph M. Kahn | 41 | Head | Manager | Colorado |
| 74 | Adelaide Kahn | 35 | Wife | — | Pennsylvania |
| 75 | Ralph Jr. Kahn | 10 | Son | — | Utah |
| 76 | Arnold Kahn | 4 | Son | — | Utah |
| 77 | Vadis Taylor | 21 | Servant | Maid | Utah |
| 78 | Harold Jennings | 41 | Head | Assistant Manager | Utah |
| 79 | Mary Jennings THIS PERSON | 40 | Wife | — | Utah |
| 80 | Mary Jane Jennings | 20 | Daughter | — | Utah |
Pedigree Summary
Mary
Gen 1 · 2 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)