DM
David Martin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this David Martin across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1883), then head of a 5-person household.
Age 57
b. ~1883
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Martin |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Freight Agent |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 496 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Freight Agent |
| Township / Ward | Chicago |
| Est. Birth Year | ~1883 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to David | Age | Birth yr |
|---|---|---|---|---|
| Lucille Buckley | Daughter | — | 31 | ~1909 |
| David Martin | Head | — | 57 | ~1883 |
| Betty Buckley | Other | — | 6 | ~1934 |
| James Buckley | Other | — | 33 | ~1907 |
| Elizabeth Martin | Spouse | — | 54 | ~1886 |
Census Appearances
1920
Cook, Illinois
Head, age 36
Cook, Illinois · implied b. ~1884 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1902 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Steam Railway |
| Industry | Steam Railway |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Home Owned/Rented | R |
| Birth Country | Scotland |
| Year of Naturalization | 1911 |
| Birthplace (normalized) | scotland |
1930
Cook, Illinois
Head, age 47
Cook, Illinois · implied b. ~1883 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1900 |
| Age at First Marriage | 23 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Solicitor |
| Industry | Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 65 |
| Radio Set | R |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Cook-County, Illinois
Head, age 57
Cook-County, Illinois · implied b. ~1883 — 5 household members
| Surname | Martin |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Freight Agent |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 496 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 David Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
David Martin
Head · 1940 · age 57 · b. ~1883 · 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
39 people indexed on this census page (nara:1940:m-t0627-00955-00382)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Patricia Madden | 15 | Daughter | — | Illinois |
| 42 | Jerome L Madden | 13 | Son | — | Illinois |
| 43 | Sheila B Madden | 11 | Daughter | — | Illinois |
| 44 | Emile Roheacker | 42 | Head | Machinist | Germany |
| 45 | Nelda Roheacker | 42 | Wife | — | Missouri |
| 46 | Arthur Roheacker | 23 | Son | Machinist | Illinois |
| 47 | Teresa Sheahan | 77 | Head | — | New York |
| 48 | Julia Sheahan | 48 | Daughter | General Clerk | Illinois |
| 49 | Henry D Sheahan | 47 | Son | Operator | Illinois |
| 50 | Leo Sheahan | 45 | Son | Labor | Illinois |
| 51 | Paul Sharle | 36 | Head | Automobile Mechanic | Illinois |
| 52 | Hazel M Sharle | 35 | Wife | — | Illinois |
| 53 | John C Sharle | 2 | Son | — | Illinois |
| 54 | John Tanney | 29 | Head | Chauffeur | Illinois |
| 55 | Emma J Tanney | 26 | Wife | — | Illinois |
| 56 | Yvonne Tanney | 5 | Daughter | — | Illinois |
| 57 | Matthew Moreau | 50 | Head | — | Illinois |
| 58 | Minnie Moreau | 43 | Wife | Saleslady | Illinois |
| 59 | David Martin THIS PERSON | 57 | Head | Freight Agent | Scotland |
| 60 | Elizabeth Martin | 54 | Wife | — | Illinois |
| 61 | James B Buckley | 33 | Son-in-law | Printer | Pennsylvania |
| 62 | Lucille Buckley | 31 | Daughter | — | Illinois |
| 63 | Betty Jean Buckley | 6 | Grandchild | — | Illinois |
| 65 | John Oprea | 42 | Head | Janitor | Roumania |
| 66 | Mary Oprea | 29 | Wife | — | Roumania |
| 67 | John Oprea | 5 | Son | — | Roumania |
| 68 | Victoria Oprea | 2 | Daughter | — | Illinois |
| 69 | Clyde T Simmons | 48 | Head | Salesman (Retail) | Kentucky |
| 70 | Mary L Simmons | 50 | Wife | Stenographer | Kentucky |
| 71 | Carrie F Bringas | 44 | Head | — | Illinois |
| 72 | Harry W Bringas | 16 | Son | — | Illinois |
| 73 | Jack B Donahue | 23 | Son | Delivery Boy (Retail Meat) | Illinois |
| 74 | Phyllis D Donahue | 21 | Daughter | Beauty Operator | Illinois |
| 75 | Arthur Nielsen | 41 | Head | Milk Salesman | Illinois |
| 76 | Lucile Nielsen | 30 | Wife | — | South Dakota |
| 77 | Joyce Nielsen | 7 | Daughter | — | Illinois |
| 78 | Ida Youngman | 62 | Head | Dressmaker | Sweden |
| 79 | Mildred Youngman | 37 | Daughter | Stenographer | Illinois |
| 80 | James H Duellman | 41 | Head | Railroad Clerk | 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)