WM
Walter Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Walter Martin across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Charles & Charles — first a head (b.~1902), then head of a 4-person household.
Age 38
b. ~1902
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Martin |
| Given Name | Walter |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Proprietor |
| Industry | Expressing |
| Class of Worker | OA |
| Hours Worked | 60 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Proprietor |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1902 |
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 Walter | Age | Birth yr |
|---|---|---|---|---|
| Lorraine Martin | Daughter | — | 10 | ~1930 |
| Joyce Martin | Daughter | — | 2 | ~1938 |
| Walter Martin | Head | — | 38 | ~1902 |
| Margaret Martin | Spouse | — | 32 | ~1908 |
Census Appearances
1920
Cook, Illinois
Son, age 17
Cook, Illinois · implied b. ~1903 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Walter |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 27
Cook, Illinois · implied b. ~1903 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Walter R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Piano Tuner |
| Industry | Musical |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 38
Cook-County, Illinois · implied b. ~1902 — 4 household members
| Surname | Martin |
| Given Name | Walter |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Proprietor |
| Industry | Expressing |
| Class of Worker | OA |
| Hours Worked | 60 |
| Highest Grade | Hs 4 |
| 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 Walter Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Martin (~0.92 confidence) and father Charles Martin (~0.92 confidence) and mother Clara Martin (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Martin
b. ~1878
Source father
● Household
· direct · ~0.92
Father
Charles Martin
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Clara Martin
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Walter Martin
Head · 1940 · age 38 · b. ~1902 · 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-t0627-00938-00628)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Albert Burgy | 62 | Head | Salesman | Kentucky |
| 2 | Florence Burgy | 42 | Wife | — | Illinois |
| 3 | Joseph Burgy | 22 | Son | — | Illinois |
| 4 | Kathryn B. Mulhall | 65 | Head | — | Iowa |
| 5 | William S. Mulhall | 36 | Son | Bookkeeper | Illinois |
| 6 | William E. Mosby | 52 | Head | Real Estate Broker | Kentucky |
| 7 | Mary Mosby | 41 | Wife | — | New York |
| 8 | Richard Williams | 37 | Head | Contracting Engineer | England |
| 9 | Katherine Williams | 35 | Wife | — | Indiana |
| 10 | Murray Williams | 15 | Son | — | Arizona |
| 11 | Richard Gaughan | 65 | Head | Executive | Kentucky |
| 12 | Vera Gaughan | 62 | Wife | — | Kentucky |
| 13 | Benjamin Gaughan | 32 | Son | Salesman | Kentucky |
| 14 | Willis H. Porter | 25 | Head | Renting Manager | Illinois |
| 15 | Betty Porter | 22 | Wife | — | Kentucky |
| 16 | Steven Porter | 1 | Son | — | Illinois |
| 17 | Willis H. Porter | 57 | Head | Guard | Ohio |
| 18 | Elizabeth Porter | 55 | Wife | — | Cook Co. English |
| 19 | Margaret Carmody | 21 | Head | Teacher | Kentucky |
| 20 | Elizabeth Carmody | 20 | Sister | Teacher | Kentucky |
| 21 | Catherine Costello | 21 | Sister | Teacher | Kentucky |
| 22 | John Costello | 20 | Nephew | — | Philippines |
| 23 | Walter Martin THIS PERSON | 38 | Head | Proprietor | Illinois |
| 24 | Margaret Martin | 32 | Wife | — | Illinois |
| 25 | Lorraine Martin | 10 | Daughter | — | Illinois |
| 26 | Joyce Martin | 2 | Daughter | — | Illinois |
| 27 | Charles West | 60 | Head | Engraver | Denmark |
| 28 | Katherine West | 55 | Wife | — | Iowa |
| 29 | Marie Damsgaard | 51 | Sister | Statistician | Denmark |
| 30 | Ruth Mcclum | 44 | Head | Ticket Agent | Minnesota |
| 31 | Millie Mcclum | 63 | Sister | Practitioner | Minnesota |
| 32 | Irma Wilson | 40 | Sister | — | Minnesota |
| 33 | Ruth S. Wilson | 18 | Daughter | — | Illinois |
| 34 | Floyd Miller | 47 | Head | Sales Manager | Kentucky |
| 35 | Jessie Miller | 46 | Wife | — | Kentucky |
| 36 | Randall Miller | 22 | Son | Salesman | Kentucky |
| 37 | Herbert Miller | 15 | Son | — | Kentucky |
| 38 | Geraldine Miller | 13 | Daughter | — | Kentucky |
| 39 | Roy N. Lennstrom | 46 | Head | Engineer | Illinois |
| 40 | Ebba Lennstrom | 41 | Wife | — | Illinois |
Pedigree Summary
Walter
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)