RM
Robert Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Des-Moines-County, Iowa
Our Model Tree links this Robert Martin across the 1920, 1930 and 1940 US Censuses in Des-Moines-County, Iowa (XGBoost, ~Confirmed), with identified parents Robert & Jacob — first a son (b.~1917), then head of a 3-person household.
Age 23
b. ~1917
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Des-Moines-County, Iowa |
| Surname | Martin |
| Given Name | Robert J Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (County) | Des Moines |
| Additional Details | |
| Occupation | Special Service |
| Industry | Detective |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 420 |
| Highest Grade | Hs 4 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Special Service |
| Township / Ward | Burlington |
| Est. Birth Year | ~1917 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Martin | Head | — | 54 | ~1886 |
| Robert Martin | Son | — | 23 | ~1917 |
| Mrs Martin | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Des Moines, …
Son, age 2
Des Moines, Iowa · implied b. ~1918 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Robert H |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Des Moines, …
Son, age 12
Des Moines, Iowa · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Robert R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Des-Moines-County, Iowa
Son, age 23
Des-Moines-County, Iowa · implied b. ~1917 — 3 household members
| Surname | Martin |
| Given Name | Robert J Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (County) | Des Moines |
| Occupation | Special Service |
| Industry | Detective |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 420 |
| Highest Grade | Hs 4 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Robert Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Martin (~0.92 confidence) and father Jacob Martin (~0.92 confidence) and father Jacob Martin (~0.92 confidence) and mother Matilda Martin (~0.92 confidence) and mother Mrs Martin (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Martin
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Jacob Martin
b. ~1874
Source father
● Household
· direct · ~0.92
Father
Jacob Martin
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Matilda Martin
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
Mrs Martin
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Martin
Son · 1940 · age 23 · b. ~1917 · Iowa
★ 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 — Des-Moines-County, Iowa
Open full size
1940 US Federal Census — Des-Moines-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01156-00656)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Gary George Kaminski | 2 | Son | — | Iowa |
| 2 | Herman Maurice Kaminski | 33 | Head | Manager | Poland |
| 3 | Mrs Mildred Kaminski | 34 | Wife | — | Poland |
| 4 | Richard Kaminski | 12 | Son | — | Illinois |
| 5 | Lawrence Kaminski | 10 | Son | — | Illinois |
| 6 | Miss May I Rowan | 46 | Head | Stenographer | Iowa |
| 7 | Jacob Christman | 89 | Head | Loco Engineer | Missouri |
| 8 | Mrs Pauline Christman | 84 | Wife | — | Iowa |
| 9 | Herbert L Christman | 51 | Son | 30 | Iowa |
| 10 | Mrs Olive Christman | 40 | Daughter-in-law | — | Ohio |
| 11 | Clifford T Aschoff | 41 | Head | Journeyman | Iowa |
| 12 | Mrs Ellen Aschoff | 42 | Wife | House Work | Iowa |
| 13 | Clifford T Jr Aschoff | 17 | Son | — | Iowa |
| 14 | Carl Richard Aschoff | 15 | Son | — | Iowa |
| 15 | Andrew Le Roy Aschoff | 11 | Son | — | Iowa |
| 16 | L H Jr Shelley | 30 | Lodger | Flying Instructor | Pennsylvania |
| 17 | Mrs Thelma Shelley | 27 | Wife | — | Pennsylvania |
| 18 | Patricia Lorraine Shelley | 1 | Daughter | — | Florida |
| 19 | Arthur H Parsons | 72 | Head | — | Canada-Eng |
| 20 | Mrs Jennie Parsons | 62 | Wife | Avon Prod | Wisconsin |
| 21 | Leon C Miller | 52 | Head | 60 | Iowa |
| 22 | Mrs Clara Miller | 50 | Wife | 30 | Iowa |
| 23 | Raymond A Miller | 15 | Son | — | Iowa |
| 24 | Robert Taylor Milnes | 40 | Head | Salesman | Iowa |
| 25 | Mildred Margaret Milnes | 41 | Wife | — | Iowa |
| 26 | Marilyn Frances Milnes | 8 | Daughter | — | Iowa |
| 27 | Virginia Ann Milnes | 6 | Daughter | — | Iowa |
| 28 | Mary Elizabeth Milnes | 0 | Daughter | — | Iowa |
| 29 | Robert J Sr Martin | 54 | Head | Salesman | Iowa |
| 30 | Mrs Jeanette Martin | 50 | Wife | — | Iowa |
| 31 | Robert J Jr Martin THIS PERSON | 23 | Son | Special Service | Iowa |
| 32 | Alex B Putnam | 56 | Head | So Bell | Alabama |
| 33 | Mrs Lulu Putnam | 55 | Wife | — | Iowa |
| 34 | Mrs Lillian B Haskell | 77 | Head | — | New York |
| 35 | Miss Villah Haskell | 53 | Daughter | — | Iowa |
| 36 | Mrs Alma Kuhn | 79 | Head | — | Germany |
| 37 | Miss Pearl Kuhn | 55 | Daughter | Teacher | Iowa |
| 38 | Myrla Kuhn | 48 | Daughter | Asst Cashier | Iowa |
| 39 | Frederick Leopold | 44 | Head | Director | Iowa |
| 40 | Mrs Edith Leopold | 42 | Wife | — | Iowa |
Pedigree Summary
Robert
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)