MF
Mary Frank — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Illinois
Our Model Tree links this Mary Frank across the 1930 and 1940 US Censuses in Lake-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1892), then head of a 8-person household.
Age 48
b. ~1892
Female
Head
Born: Illinois
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Illinois |
| Surname | Frank |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Waukegan City |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Waukegan City |
| Est. Birth Year | ~1892 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Genevieve Frank | Daughter | — | 15 | ~1925 |
| Dolores Frank | Daughter | — | 12 | ~1928 |
| Caroline Frank | Daughter | — | 17 | ~1923 |
| Mary Frank | Head | — | 48 | ~1892 |
| Anthony Frank | Son | — | 22 | ~1918 |
| John Frank | Son | — | 13 | ~1927 |
| Bernard Frank | Son | — | 25 | ~1915 |
| Richard Frank | Son | — | 8 | ~1932 |
Census Appearances
1930
Lake, Illinois
Spouse, age 39
Lake, Illinois · implied b. ~1891 — 14 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frank |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 17 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Lake-County, Illinois
Head, age 48
Lake-County, Illinois · implied b. ~1892 — 8 household members
| Surname | Frank |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Waukegan City |
| 1935 Residence (County) | Lake |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 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 Frank across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Frank
Head · 1940 · age 48 · b. ~1892 · 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 — Lake-County, Illinois
Open full size
1940 US Federal Census — Lake-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00830-00504)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anna Emerzian | 14 | Daughter | — | Illinois |
| 2 | Jerry Emerzian | 11 | Son | — | Illinois |
| 3 | Alfred J. Trepanier | 41 | Head | Machine Operator | Illinois |
| 4 | Margurite Trepanier | 42 | Wife | — | Illinois |
| 5 | Alfred Jr. Trepanier | 16 | Son | — | Illinois |
| 6 | Bernice Trepanier | 15 | Daughter | — | Illinois |
| 7 | Caroline Trepanier | 14 | Daughter | — | Illinois |
| 8 | Millicent Trepanier | 12 | Daughter | — | Illinois |
| 9 | Shirley Trepanier | 10 | Daughter | — | Illinois |
| 10 | Leroy Trepanier | 7 | Son | — | Illinois |
| 11 | William R. Rose | 45 | Head | Dentist | Tennessee |
| 12 | Birdie Rose | 41 | Wife | — | Kentucky |
| 13 | William R. Rose | 18 | Son | — | Illinois |
| 14 | Robert A. Rose | 9 | Son | — | Illinois |
| 15 | Helen Jones | 38 | Head | Seamstress | Alabama |
| 16 | Florence Murphy | 49 | Lodger | — | Kentucky |
| 17 | Clarence Bankhead | 27 | Head | Ditch Digger | Alabama |
| 18 | Lily Bankhead | 30 | Wife | — | Alabama |
| 19 | Ashfold Payne | 55 | Head | Night Watchman | Alabama |
| 20 | Tarola Payne | 31 | Wife | — | Alabama |
| 21 | Francis Covington | 15 | Son | — | Illinois |
| 22 | Kate Parrot | 40 | Lodger | Private Nurse | Illinois |
| 23 | Thomas Green | 28 | Head | Stretcher | Arkansas |
| 24 | Malie Green | 28 | Wife | Beauty Operator | Alabama |
| 25 | Mary Frank THIS PERSON | 48 | Head | — | Illinois |
| 26 | Bernard Frank | 25 | Son | Stenographer | Illinois |
| 27 | Anthony Frank | 22 | Son | Caretaker | Illinois |
| 28 | Caroline Frank | 17 | Daughter | House Work | Illinois |
| 29 | Genevieve Frank | 15 | Daughter | — | Illinois |
| 30 | John Frank | 13 | Son | — | Illinois |
| 31 | Dolores Frank | 12 | Daughter | — | Illinois |
| 32 | Richard Frank | 8 | Son | — | Illinois |
| 33 | Harry Boyer | 63 | Head | Laborer | Ohio |
| 34 | Mary Boyer | 44 | Wife | — | Illinois |
| 35 | Charles Boyer | 26 | Son | Laborer | Illinois |
| 36 | Harry Jr. Boyer | 24 | Son | Wrecker | Illinois |
| 37 | Marge Boyer | 19 | Daughter | — | Illinois |
| 38 | Louis Boyer | 16 | Daughter | — | Illinois |
| 39 | Jane Boyer | 10 | Daughter | — | Illinois |
| 40 | Jean Boyer | 10 | Daughter | — | 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)