CM
Clarence Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Rock-Island-County, Illinois
Our Model Tree links this Clarence Martin across the 1920, 1930 and 1940 US Censuses in Rock-Island-County, Illinois (XGBoost, ~Confirmed), with identified parents B & Benjamin — first a son (b.~1898), then head of a 5-person household.
Age 42
b. ~1898
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Rock-Island-County, Illinois |
| Surname | Martin |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Rock Island |
| 1935 Residence (County) | Rock Island |
| Additional Details | |
| Occupation | Laborer |
| Industry | Gen'l Construction |
| Class of Worker | PW |
| Hours Worked | 72 |
| Income (1939) | 0 |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Laborer |
| Township / Ward | Rock Island |
| Est. Birth Year | ~1898 |
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 Clarence | Age | Birth yr |
|---|---|---|---|---|
| Benjamin Martin | Head | — | 70 | ~1870 |
| Clarence Martin | Son | — | 42 | ~1898 |
| Robert Martin | Son | — | 25 | ~1915 |
| Anna Martin | Spouse | — | 64 | ~1876 |
| John Martin | Other | — | 6 | ~1934 |
Census Appearances
1920
Rock Island, …
Son, age 21
Rock Island, Illinois · implied b. ~1899 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martens |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | Laborer |
| Industry | Car Wks |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Rock Island, …
Son, age 30
Rock Island, Illinois · implied b. ~1900 — 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 | 30 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | laborer |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Rock-Island-County, Illinois
Son, age 42
Rock-Island-County, Illinois · implied b. ~1898 — 5 household members
| Surname | Martin |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Rock Island |
| 1935 Residence (County) | Rock Island |
| Occupation | Laborer |
| Industry | Gen'l Construction |
| Class of Worker | PW |
| Hours Worked | 72 |
| Income (1939) | 0 |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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: father B Martin (~0.92 confidence) and father Benjamin Martens (~0.92 confidence) and father Benjamin Martin (~0.92 confidence) and mother Anna Martin (~0.92 confidence) and mother Amanda Martens (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
B Martin
b. ~1869
Source father
● Household
· direct · ~0.92
Father
Benjamin Martens
b. ~1869
Source father
● Household
· direct · ~0.92
Father
Benjamin Martin
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Anna Martin
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Amanda Martens
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Clarence Martin
Son · 1940 · age 42 · b. ~1898 · Illinois
★ You are viewing this record
Sibling
Robert Martin
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Rock-Island-County, Illinois
Open full size
1940 US Federal Census — Rock-Island-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00876-00123)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Griffin | 36 | Head | Spray Painter | Pennsylvania |
| 2 | Elizabeth Griffin | 36 | Wife | — | Illinois |
| 3 | William Jr Griffin | 15 | Son | — | Illinois |
| 4 | Dorothy Griffin | 14 | Daughter | — | Illinois |
| 5 | Robert Griffin | 8 | Son | — | Illinois |
| 6 | Donald Griffin | 5 | Son | — | Illinois |
| 7 | Helen Griffin | 3 | Daughter | — | Illinois |
| 8 | Russell Griffin | 1 | Son | — | Illinois |
| 9 | Thomas Davis | 45 | Head | Assembler | Tennessee |
| 10 | Annie Davis | 44 | Wife | — | Tennessee |
| 11 | Juanita Davis | 25 | Daughter | — | Tennessee |
| 12 | Joan Davis | 15 | Daughter | — | Illinois |
| 13 | Earl Norton | 23 | Son-in-law | Truck Driver | Illinois |
| 14 | Ruby Norton | 16 | Daughter | — | Georgia |
| 15 | Riley Davis | 24 | Stepson | Sewerage Construction | Georgia |
| 16 | William Mead | 24 | Nephew | — | Georgia |
| 17 | Samuel Simmons | 36 | Head | Boat Topper | Illinois |
| 18 | Catherine Simmons | 33 | Wife | — | Illinois |
| 19 | Robert Simmons | 13 | Son | — | Illinois |
| 20 | Benjamin Martin | 70 | Head | — | Indiana |
| 21 | Anna Martin | 64 | Wife | — | Indiana |
| 22 | Clarence Martin THIS PERSON | 42 | Son | Laborer | Indiana |
| 23 | Robert Martin | 25 | Son | Truck Driver | Missouri |
| 24 | John Jr. Martin | 6 | Grandson | — | Illinois |
| 25 | Marie Anderson | 22 | Head | — | Belgium |
| 26 | Ida Verplaetse | 54 | Daughter | — | Belgium |
| 27 | Forrest Owens | 42 | Head | Janitor | Arkansas |
| 28 | Addie Owens | 32 | Wife | — | Arkansas |
| 29 | (Left In Error) | None | — | — | — |
| 30 | August Stevens | 35 | Head | Floor Machinist | Illinois |
| 31 | Leota Stevens | 34 | Wife | Binder Machine Operator | Illinois |
| 32 | Augustus Jr. Stevens | 14 | Son | — | Illinois |
| 33 | Carroll Stevens | 13 | Daughter | — | Illinois |
| 34 | Catherine Stevens | 70 | Mother | — | Missouri |
| 35 | Clayton Shoup | 61 | Head | Bartender | Ohio |
| 36 | Lillian Shoup | 41 | Wife | — | Illinois |
| 37 | Virginia Shoup | 28 | Daughter | Supervisor | Illinois |
| 38 | Howard Shoup | 25 | Son | Apprentice Steamfitter | Illinois |
| 39 | Donald Shoup | 24 | Son | Floor Machinist | Illinois |
| 40 | Robert Shoup | 20 | Son | Laborer | Illinois |
Pedigree Summary
Clarence + 1 sibling
Gen 1 · 5 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)