CM
Clarence Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Clarence Martin across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Margaret & Wesley — first a son (b.~1913), then head of a 4-person household.
Age 27
b. ~1913
Male
Son
Born: Illinois
Divorced
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Martin |
| Given Name | Clarence |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Divorced |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | fireman |
| Industry | steel mill |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 2600 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Fireman |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1913 |
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 Clarence | Age | Birth yr |
|---|---|---|---|---|
| Lesky Martin | Other | — | 45 | ~1895 |
| Clarence Martin | Son | — | 27 | ~1913 |
| Margaret Martin | Spouse | — | 57 | ~1883 |
| Wesley Martin | Head | — | 54 | ~1886 |
Census Appearances
1920
Cook, Illinois
Son, age 7
Cook, Illinois · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 18
Cook, Illinois · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Illinois |
| Occupation | Door operator |
| Industry | Steel mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 27
Cook-County, Illinois · implied b. ~1913 — 4 household members
| Surname | Martin |
| Given Name | Clarence |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Divorced |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | fireman |
| Industry | steel mill |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 2600 |
| Highest Grade | H 1 |
| 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 Clarence Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Margaret Martin (~0.92 confidence) and father Wesley Martin (~0.92 confidence) and father Wesley Martin (~0.92 confidence) and mother Margaret Martin (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Margaret Martin
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
Wesley Martin
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Wesley Martin
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Margaret Martin
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Clarence Martin
Son · 1940 · age 27 · b. ~1913 · 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 — 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-t0627-00942-00649)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Henry Margraff | 49 | head | Engineer | Illinois |
| 42 | Clara Margraff | 40 | wife | — | Illinois |
| 43 | Donald Margraff | 16 | son | — | Illinois |
| 44 | Norman Margraff | 13 | son | — | Illinois |
| 45 | Richard Margraff | 11 | son | — | Illinois |
| 46 | Wesley B. Martin | 54 | head | — | Pennsylvania |
| 47 | Margaret Martin | 57 | wife | Crane Man | Illinois |
| 48 | Clarence Martin THIS PERSON | 27 | son | Fireman | Illinois |
| 49 | Lesky, James Martin | 45 | lodger | Bartender | Illinois |
| 50 | Joseph H. Sterbentz | 32 | head | Clerk | Minnesota |
| 51 | Rose Mary Sterbentz | 29 | wife | — | Illinois |
| 52 | Jacqueline Sterbentz | 5 | daughter | — | Illinois |
| 53 | Fred Dsert | 58 | head | Engineer | Illinois |
| 54 | Rose Dsert | 57 | wife | — | Illinois |
| 55 | Walter O. Elsner | 42 | head | Oiler | Illinois |
| 56 | Emma B. Elsner | 41 | wife | — | Illinois |
| 57 | Raymond Elsner | 17 | son | — | Illinois |
| 58 | George Elsner | 16 | son | — | Illinois |
| 59 | Michael Vargo | 52 | head | Watchman | Hungary |
| 60 | Barbara Vargo | 46 | wife | — | Hungary |
| 61 | Violet Vargo | 19 | daughter | Secretary | Indiana |
| 62 | John J. Peterlich | 48 | head | Butcher | Yugoslavia |
| 63 | Mary Peterlich | 40 | wife | — | Illinois |
| 64 | John Halquist | 44 | head | Machinist | Sweden |
| 65 | Inez Halquist | 40 | wife | — | Sweden |
| 66 | Donald Halquist | 12 | son | — | Illinois |
| 67 | Allen Halquist | 8 | son | — | Illinois |
| 68 | Lorna Halquist | 6 | daughter | — | Illinois |
| 69 | Kenneth Lorenzen | 36 | head | Second Heater | Illinois |
| 70 | Bernice Lorenzen | 27 | wife | — | Illinois |
| 71 | Kenneth Jr. Lorenzen | 10 | son | — | Illinois |
| 72 | Julius Cook | 57 | head | Foreman | Germany |
| 73 | Emily Cook | 57 | wife | — | Germany |
| 74 | Fred Cook | 27 | son | Third Helper | Indiana |
| 75 | Edward Cook | 23 | son | Oiler | Indiana |
| 76 | Arthur Cook | 21 | son | Machinist | Indiana |
| 77 | Axel Uddman | 37 | head | Assistant Cashier | Sweden |
| 78 | Irene Uddman | 30 | wife | — | Illinois |
| 79 | Roy Uddman | 7 | son | — | Illinois |
| 80 | Dorothy Ann Uddman | 4 | daughter | — | Illinois |
Pedigree Summary
Clarence
Gen 1 · 4 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)