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Harry Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Harry Martin across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Harry & Jane — first a head (b.~1893), then head of a 4-person household.
Age 47
b. ~1893
Male
Head
Born: England
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Martin |
| Given Name | Harry |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Proprietor |
| Industry | Surgical Supp Co |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 984 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
| Occupation | Proprietor |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1893 |
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 Harry | Age | Birth yr |
|---|---|---|---|---|
| Jane Martin | Daughter | — | 17 | ~1923 |
| Harry Martin | Head | — | 47 | ~1893 |
| Sylvia Whitehead | Other | — | 34 | ~1906 |
| Violet Martin | Spouse | — | 42 | ~1898 |
Census Appearances
1920
Cook, Illinois
Son, age 28
Cook, Illinois · implied b. ~1892 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | England |
| Year of Immigration | 1891 |
| Naturalization Status | Naturalized |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Clerk |
| Industry | In Factory |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
Son, age 38
Cook, Illinois · implied b. ~1892 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Henry Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | Naturalized |
| Year of Immigration | 1892 |
| Age at First Marriage | 24 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Printer |
| Industry | Newspaper |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Cook-County, Illinois
Head, age 47
Cook-County, Illinois · implied b. ~1893 — 4 household members
| Surname | Martin |
| Given Name | Harry |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Proprietor |
| Industry | Surgical Supp Co |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 984 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
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 Harry Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry Martin (~0.92 confidence) and mother Jane Martin (~0.92 confidence) and mother Agnes Martin (~0.92 confidence) and father Henry Martin (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry Martin
b. ~1869
Source father
● Household
· direct · ~0.92
Mother
Jane Martin
b. ~1869
Source mother
● Household
· direct · ~0.92
Mother
Agnes Martin
b. ~1870
Source mother
● Household
· direct · ~0.92
Father
Henry Martin
b. ~1870
Source father
● Household
· direct · ~0.92
This person
Anchor record
Harry Martin
Head · 1940 · age 47 · b. ~1893 · 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
38 people indexed on this census page (nara:1940:m-t0627-00989-00672)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Harry Martin THIS PERSON | 47 | Head | Proprietor | England |
| 42 | Violet Martin | 42 | Wife | Fitter | England |
| 43 | Jane Martin | 17 | Daughter | — | Illinois |
| 44 | Sylvia Whitehead | 34 | Maid | Maid | Wisconsin |
| 47 | Emma Frunzy | 48 | Head | — | Illinois |
| 48 | Raymond Frunzy | 24 | Son | Clerk (Sub) | Illinois |
| 49 | Carl Krumhardt | 30 | Head | Radio Service | Germany |
| 50 | Florence Krumhardt | 27 | Wife | — | Illinois |
| 51 | Carl Jr. Krumhardt | 3 | Son | — | Illinois |
| 52 | Effie Halvorsen | 49 | Head | — | Illinois |
| 53 | Edward Halvorsen | 44 | Brother | Maintenance | Illinois |
| 54 | Henry Pearson | 42 | Roomer | Bricklayer | Norway |
| 55 | William Hart | 47 | Head | Accountant | Illinois |
| 56 | Margaret Hart | 41 | Wife | — | Illinois |
| 57 | Joyce Hart | 11 | Daughter | — | Illinois |
| 58 | Sophia Christoffel | 71 | Mother-in-law | — | Switzerland |
| 59 | Emanuel Christoffel | 39 | Brother-in-law | Repair Man | Illinois |
| 60 | Edwin Pavel | 24 | Head | Machinist | Illinois |
| 61 | Marge Pavel | 19 | Wife | Switchboard Op. | Illinois |
| 62 | James Pavel | 65 | Head | Chair Maker | Illinois |
| 63 | Emma Pavel | 57 | Wife | — | Illinois |
| 64 | Hugh Pavel | 36 | Son | — | Illinois |
| 65 | Raymond Pavel | 34 | Son | Clerk | Illinois |
| 66 | Nicholas Role | 75 | Head | — | Luxemburg |
| 67 | Marianne Role | 70 | Wife | — | Luxemburg |
| 68 | William Nark | 40 | Son-in-law | Lithographer | Wisconsin |
| 69 | Lillian Nark | 35 | Daughter | Waitress | Illinois |
| 70 | Howard Warwick | 38 | Head | Partnership | Illinois |
| 71 | Laura Warwick | 35 | Wife | — | Illinois |
| 72 | Lenore Warwick | 12 | Daughter | — | Illinois |
| 73 | John Warwick | 9 | Son | — | Illinois |
| 74 | Minnie Warwick | 59 | Mother-in-law | — | Illinois |
| 75 | Roelof Jew-Brum | 52 | Head | Partner | Illinois |
| 76 | Martha Jew-Brum | 50 | Wife | — | Illinois |
| 77 | Ralph Jew-Brum | 27 | Son | Shipping Clerk | Illinois |
| 78 | Walter Jew-Brum | 20 | Son | Stamper | Illinois |
| 79 | Albert Hassell | 75 | Head | — | Germany |
| 80 | Amelia Hassell | 68 | Wife | — | Indiana |
Related Census Records
Pedigree Summary
Harry
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)