RM
Robert Montgomery — 1940 US Census Record
Model Tree available1940 United States Federal Census · Madison-County, Illinois
Our Model Tree links this Robert Montgomery across the 1920, 1930 and 1940 US Censuses in Madison-County, Illinois (XGBoost, ~Confirmed), with identified parents Reid & Albert — first a son (b.~1915), then head of a 6-person household.
Age 25
b. ~1915
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Madison-County, Illinois |
| Surname | Montgomery |
| Given Name | Robert R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Alton city |
| 1935 Residence (County) | Madison |
| Additional Details | |
| Occupation | Nurse |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 736 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Nurse |
| Township / Ward | Alton City |
| Est. Birth Year | ~1915 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Eleanor Montgomery | Daughter | — | 33 | ~1907 |
| Reid Montgomery | Head | — | 59 | ~1881 |
| Robert Montgomery | Son | — | 25 | ~1915 |
| Reid Montgomery | Son | — | 26 | ~1914 |
| Mildred Montgomery | Spouse | — | 20 | ~1920 |
| Louise Montgomery | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Madison, Illinois
Son, age 4
Madison, Illinois · implied b. ~1916 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Montgomery |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| 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
Madison, Illinois
Son, age 15
Madison, Illinois · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Montgomery |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Madison-County, Illinois
Son, age 25
Madison-County, Illinois · implied b. ~1915 — 6 household members
| Surname | Montgomery |
| Given Name | Robert R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Alton city |
| 1935 Residence (County) | Madison |
| Occupation | Nurse |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 736 |
| 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 Robert Montgomery across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Reid Montgomery (~0.92 confidence) and father Albert Montgomery (~0.92 confidence) and mother Louise Montgomery (~0.92 confidence) and mother Mildred Montgomery (~0.50 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.82
Father
Reid Montgomery
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Albert Montgomery
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Louise Montgomery
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Mildred Montgomery
b. ~1920
Source mother
● Household
· direct · ~0.5
This person
Anchor record
Robert Montgomery
Son · 1940 · age 25 · b. ~1915 · Illinois
★ You are viewing this record
Sibling
Eleanor Montgomery
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Reid Montgomery
Sibling · 1940 · age 26
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 — Madison-County, Illinois
Open full size
1940 US Federal Census — Madison-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00848-00371)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Reid C. Montgomery | 59 | Head | Clerical | Illinois |
| 2 | Louise W. Montgomery | 57 | Wife | — | Illinois |
| 3 | Robert R. Montgomery THIS PERSON | 25 | Son | Nurse | Illinois |
| 4 | Eleanor A. Montgomery | 33 | Daughter | — | Illinois |
| 5 | Reid W. Montgomery | 26 | Son | Salesman | Illinois |
| 6 | Mildred D. Montgomery | 20 | Wife | Packer | Illinois |
| 7 | Lilly S. Johnson | 76 | Head | — | Illinois |
| 8 | Dorothy J. Johnson | 36 | Daughter | Agent | Illinois |
| 9 | Annie M. Beals | 71 | Head | Clerk | Illinois |
| 10 | Richard J. Neumann | 31 | Head | Clerk | Alabama |
| 11 | Francis Neumann | 30 | Wife | — | New York |
| 12 | Richard Neumann | 4 | Son | — | Illinois |
| 13 | Rachel Anderson | 53 | Wife | — | Pennsylvania |
| 14 | Hilda Anderson | 58 | Head | Superintendent | Pennsylvania |
| 15 | Joseph B. Anderson | 24 | Son | Owner | Pennsylvania |
| 16 | Clarence Richardson | 56 | Head | — | Illinois |
| 17 | Hazel Coussell | 47 | Daughter | Clerical | Illinois |
| 18 | Violet Stearns | 35 | Roomer | — | Great Britain |
| 19 | Mayme K. Wolff | 40 | Wife | — | Illinois |
| 20 | James H. Wolff | 53 | Head | Spray Painter | Illinois |
| 21 | James Jr. Wolff | 13 | Son | — | Illinois |
| 22 | Dorothy L. Wolff | 15 | Daughter | — | Illinois |
| 23 | Virginia Wolff | 20 | Daughter | Book Keeper | Illinois |
| 24 | Vera Kanter | 55 | Wife | Black Smith | Illinois |
| 25 | Louis F. Kanter | 58 | Head | — | Illinois |
| 26 | Hellen Kanter | 16 | Daughter | — | Illinois |
| 27 | Harry W. Thomson | 56 | Head | Under Taker | Illinois |
| 28 | Helen Thomson | 54 | Wife | — | Missouri |
| 29 | Lucille Thomson | 33 | Daughter | Filler | Illinois |
| 30 | Edward H. Thomson | 11 | Son | — | Illinois |
| 31 | Fred H. Filghman | 44 | Lodger | Watchman | Illinois |
| 32 | Bertha Thompson | 57 | Sister | Waitress | Illinois |
| 33 | Gavin Kneller | 43 | Head | — | Illinois |
| 34 | Gertrude Kneller | 34 | Wife | Nurse | Illinois |
| 35 | Albert Kneller | 35 | Brother | — | Illinois |
| 36 | Dora Lenhardt | 65 | Head | — | Illinois |
| 37 | Ella Lenhardt | 48 | Sister | Book Keeper | Illinois |
| 38 | Emma Lenhardt | 48 | Sister | Book Keeper | Illinois |
| 39 | Earl W. Lenhardt | 46 | Brother | Pipe Fitter | Illinois |
| 40 | Charles W. Morgan | 69 | Head | Labor | Illinois |
Pedigree Summary
Robert + 2 siblings
Gen 1 · 4 parents
~0.81
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)