MJ
Mary Jennings — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Jennings across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1895), then head of a 11-person household.
Age 45
b. ~1895
Female
Spouse
Born: Irish Free State
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Jennings |
| Given Name | Mary R. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birthplace (normalized) | irish free state |
| Township / Ward | Chicago |
| Est. Birth Year | ~1895 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Lillian Jennings | Daughter | — | 7 | ~1933 |
| Patricia Jennings | Daughter | — | 4 | ~1936 |
| Annette Jennings | Daughter | — | 6 | ~1934 |
| Margaret Jennings | Daughter | — | 16 | ~1924 |
| John Jennings | Head | — | 46 | ~1894 |
| Michael Jennings | Son | — | 11 | ~1929 |
| Thomas Jennings | Son | — | 13 | ~1927 |
| Richard Jennings | Son | — | 9 | ~1931 |
| John Jennings | Son | — | 17 | ~1923 |
| William Jennings | Son | — | 19 | ~1921 |
| Mary Jennings | Spouse | — | 45 | ~1895 |
Census Appearances
1930
Cook, Illinois
Spouse, age 35
Cook, Illinois · implied b. ~1895 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jennings |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| Naturalization Status | Alien |
| Age at First Marriage | 25 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birthplace (normalized) | irish free state |
1940
Cook-County, Illinois
Spouse, age 45
Cook-County, Illinois · implied b. ~1895 — 11 household members
| Surname | Jennings |
| Given Name | Mary R. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Class of Worker | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birthplace (normalized) | irish free state |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Jennings
Spouse · 1940 · age 45 · b. ~1895 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01012-00008)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jack Mccarey | 55 | Head | — | Illinois |
| 2 | Helen Mccarey | 14 | Daughter | — | Illinois |
| 3 | Donald Mccarey | 3 | Son | — | Illinois |
| 4 | Daniel Mccarey | 1 | Son | — | Illinois |
| 5 | John J. Jennings | 46 | Head | Laborer | Irish Free State |
| 6 | Mary R. Jennings THIS PERSON | 45 | Wife | — | Irish Free State |
| 7 | William Jennings | 19 | Son | Drill Man | Illinois |
| 8 | John Jennings | 17 | Son | Clerk | Illinois |
| 9 | Margaret Jennings | 16 | Daughter | — | Illinois |
| 10 | Thomas Jennings | 13 | Son | — | Illinois |
| 11 | Michael Jennings | 11 | Son | — | Illinois |
| 12 | Richard Jennings | 9 | Son | — | Illinois |
| 13 | Lillian Jennings | 7 | Daughter | — | Illinois |
| 14 | Annette Jennings | 6 | Daughter | — | Illinois |
| 15 | Patricia Jennings | 4 | Daughter | — | Illinois |
| 16 | Orville Husselbee | 32 | Head | Manager | Illinois |
| 17 | Edna R. Husselbee | 26 | Wife | Accountant | Washington |
| 18 | John Husselbee | 4 | Son | — | Illinois |
| 19 | William Husselbee | 2 | Son | — | Illinois |
| 20 | Bertha B. Braun | 73 | Head | — | Germany |
| 21 | Harry Braun | 39 | Son | Truck Driver | Illinois |
| 22 | George Braun | 37 | Head | Inspector | Illinois |
| 23 | Mary X. Braun | 42 | Wife | — | Illinois |
| 24 | William Braun | 16 | Son | — | Illinois |
| 25 | Sigmund Burkart | 62 | Head | Laborer | Germany |
| 26 | Bertha B. Burkart | 69 | Wife | — | Germany |
| 27 | George Kempton | 45 | Head | Traffic Manager | Illinois |
| 28 | Hilda Kempton | 44 | Wife | — | Illinois |
| 29 | Nelson Pearl Kempton | 26 | Daughter | — | Illinois |
| 30 | Jack Kempton | 3 | Grandson | — | Illinois |
| 31 | Judith Kempton | 2 | Granddaughter | — | Illinois |
| 32 | John Isher | 35 | Head | Draftsman | Germany |
| 33 | Molly Isher | 32 | Wife | — | Russia |
| 34 | Lorna Isher | 9 | Daughter | — | Illinois |
| 35 | Edna Isher | 5 | Daughter | — | Missouri |
| 36 | Darlene Isher | 1 | Daughter | — | Illinois |
| 37 | Russell Beals | 27 | Head | Attendant | Illinois |
| 38 | Irene R. Beals | 25 | Wife | — | Illinois |
| 39 | Betty Lou Beals | 6 | Daughter | — | Illinois |
| 40 | Edna Coupland | 26 | Sister-in-law | Sales Clerk | Illinois |
Related Census Records
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)