MK
Mary Kennedy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Kane-County, Illinois
Our Model Tree links this Mary Kennedy across the 1920, 1930 and 1940 US Censuses in Kane-County, Illinois (XGBoost, ~Confirmed), with identified parents Katherine & Catherine — first a daughter (b.~1910), then head of a 2-person household.
Age 30
b. ~1910
Female
Daughter
Born: Nebraska
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Kane-County, Illinois |
| Surname | Kennedy |
| Given Name | Mary L. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Nebraska |
| 1935 Residence (City) | Aurora City |
| 1935 Residence (County) | Kane |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
| Township / Ward | Aurora City |
| Est. Birth Year | ~1910 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Kennedy | Daughter | — | 30 | ~1910 |
| Katherine Kennedy | Head | — | 70 | ~1870 |
Census Appearances
1920
Kane, Illinois
Daughter, age 10
Kane, Illinois · implied b. ~1910 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | Mary Louisa |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Nebraska |
| Father's Birthplace | New York |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1930
Kane, Illinois
Daughter, age 20
Kane, Illinois · implied b. ~1910 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Nebraska |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1940
Kane-County, Illinois
Daughter, age 30
Kane-County, Illinois · implied b. ~1910 — 2 household members
| Surname | Kennedy |
| Given Name | Mary L. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Nebraska |
| 1935 Residence (City) | Aurora City |
| 1935 Residence (County) | Kane |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
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 Kennedy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Katherine Kennedy (~0.92 confidence) and mother Catherine Kennedy (~0.92 confidence) and mother Katherine Kennedy (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Katherine Kennedy
b. ~1870
Source mother
● Household
· direct · ~0.92
Mother
Catherine Kennedy
b. ~1875
Source mother
● Household
· direct · ~0.92
Mother
Katherine Kennedy
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Kennedy
Daughter · 1940 · age 30 · b. ~1910 · Illinois
★ 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 — Kane-County, Illinois
Open full size
1940 US Federal Census — Kane-County, Illinois
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-00819-00189)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Patricia V. Hines | 32 | wife | — | Iowa |
| 42 | Wm. H. Marion | 77 | head | — | Illinois |
| 43 | Irene L. D. Marion | 74 | wife | — | Illinois |
| 44 | Emil F. Schuler | 82 | head | — | Wisconsin |
| 45 | Agnes P. Schuler | 81 | wife | — | Illinois |
| 46 | Katherine J. Kennedy | 70 | head | — | Pennsylvania |
| 47 | Mary L. Kennedy THIS PERSON | 30 | daughter | — | Nebraska |
| 48 | Ann Louise Anderson | 81 | head | — | Illinois |
| 50 | Allen D. Martin | 53 | head | Laborer | Illinois |
| 51 | Lora M. B. Martin | 53 | wife | — | Iowa |
| 52 | Dwight D. Martin | 24 | son | Machinist | Illinois |
| 53 | Harry C. Sutphen | 55 | in-law | Salesman | Iowa |
| 54 | Tom P. Michele | 36 | head | Car Inspector | Illinois |
| 55 | Violet S. Michele | 34 | wife | — | Illinois |
| 56 | Gloria June Michele | 10 | daughter | — | Illinois |
| 57 | Harvey Wm. Michele | 9 | son | — | Illinois |
| 58 | Ora C. Parker | 55 | in-law | — | S. Carolina |
| 59 | Roy F. Miller | 40 | head | Tobacco Clerk | Illinois |
| 60 | Maude E. Miller | 40 | wife | — | Illinois |
| 61 | Wm. K. Miller | 18 | son | — | Illinois |
| 62 | Roy Frank Miller | 15 | son | — | Illinois |
| 63 | Marilyn L. Miller | 10 | daughter | — | Illinois |
| 64 | Hubert L. Gilbert | 48 | head | Elevator Operator | Illinois |
| 65 | Mary A. Gilbert | 48 | wife | — | Illinois |
| 66 | Nanogean Gilbert | 17 | daughter | — | Illinois |
| 67 | Loren H. Gilbert | 14 | son | — | Illinois |
| 68 | Glen C. Gilbert | 13 | son | — | Illinois |
| 69 | Paul E. Gilbert | 12 | son | — | Illinois |
| 70 | Harold P. Anderson | 28 | head | Construction Work | Illinois |
| 71 | June L. Anderson | 32 | wife | Clothes Checker | Illinois |
| 72 | Edwin Wm. Meyers | 47 | head | Salesman | Illinois |
| 73 | Ruth Meyers | 41 | wife | — | Illinois |
| 74 | Charles Wort | 56 | head | Machinist | Illinois |
| 75 | Mary Wort | 51 | wife | — | Missouri |
| 76 | Charles E. Wort | 22 | son | Shipping Clerk | Illinois |
| 77 | Daniel V. Kopp | 48 | head | Purchasing Agent | Nebraska |
| 78 | Vera E. Kopp | 40 | wife | — | Illinois |
| 79 | Anita E. Kopp | 20 | daughter | Jewelry Clerk | Illinois |
Pedigree Summary
Mary
Gen 1 · 3 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)