WM
William Montgomery — 1940 US Census Record
Model Tree available1940 United States Federal Census · Rock-Island-County, Illinois
Our Model Tree links this William Montgomery across the 1920, 1930 and 1940 US Censuses in Rock-Island-County, Illinois (XGBoost, ~Confirmed), with identified parents W & Anna — first a son (b.~1911), then head of a 3-person household.
Age 29
b. ~1911
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Rock-Island-County, Illinois |
| Surname | Montgomery |
| Given Name | William S. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Rock Island City |
| Additional Details | |
| Occupation | secretary manager |
| Industry | clothing cleaners |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1404 |
| Highest Grade | Hs 3 |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Secretary Manager |
| Township / Ward | Rock Island City |
| Est. Birth Year | ~1911 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| W Montgomery | Head | — | 60 | ~1880 |
| William Montgomery | Son | — | 29 | ~1911 |
| Anna Montgomery | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Rock Island, …
Son, age 9
Rock Island, Illinois · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Montgomery |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Rock Island, …
Son, age 19
Rock Island, Illinois · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Montgomery |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Iowa |
| Occupation | Cleaner |
| Industry | Cleaning Plant |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Rock-Island-County, Illinois
Son, age 29
Rock-Island-County, Illinois · implied b. ~1911 — 3 household members
| Surname | Montgomery |
| Given Name | William S. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Rock Island City |
| Occupation | secretary manager |
| Industry | clothing cleaners |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1404 |
| Highest Grade | Hs 3 |
| 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 William Montgomery across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father W Montgomery (~0.92 confidence) and mother Anna Montgomery (~0.92 confidence) and father J Montgomery (~0.92 confidence) and mother M Montgomery (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
W Montgomery
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Anna Montgomery
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
J Montgomery
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
M Montgomery
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Montgomery
Son · 1940 · age 29 · b. ~1911 · 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 — 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-t0627-00877-00219)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Margaret Cameron | 36 | wife | None | Illinois |
| 42 | Patricia Cameron | 12 | daughter | None | Illinois |
| 43 | Sally Cameron | 8 | daughter | None | Illinois |
| 44 | Albert C. Erickson | 35 | head | Metal Pattern Maker | Illinois |
| 45 | Myrtle Erickson | 34 | wife | None | Colorado |
| 46 | Maxine Erickson | 15 | daughter | None | Illinois |
| 47 | Sally June Erickson | 6 | daughter | None | Illinois |
| 48 | Constantine P. Booras | 47 | head | Nite Manager | Greece |
| 49 | Elnora Booras | 39 | wife | None | Missouri |
| 50 | Mahlon Booras | 19 | son | Loader | Missouri |
| 51 | George Pappas | 40 | roomer | Owner Manager | Greece |
| 52 | George W. Kant | 53 | head | Painter | Illinois |
| 53 | Helen M. Kant | 51 | wife | — | Illinois |
| 54 | Jane Kant | 21 | daughter | Working Mens Compensation Line Off | Illinois |
| 55 | W. W. Montgomery | 60 | head | Real Estate Appraiser | Illinois |
| 56 | Anna Mae Montgomery | 57 | wife | — | Iowa |
| 57 | William S. Montgomery THIS PERSON | 29 | son | Secretary Manager | Illinois |
| 58 | Myrtle Cameron | 55 | head | Book Keeper | Illinois |
| 59 | Ethel Cameron | 54 | sister | Office Clerk | Illinois |
| 60 | John D. Williams | 45 | head | Letter Carrier | Iowa |
| 61 | Estelle M. Williams | 45 | wife | None | Iowa |
| 62 | James D. Williams | 22 | son | Accountant | Illinois |
| 63 | Rosalie J. Williams | 20 | daughter | Clerical And Proof Reader | Illinois |
| 64 | M. Todd Townley | 79 | father-in-law | None | Illinois |
| 65 | Ben H. Stilfield | 45 | head | Contractor | Illinois |
| 66 | Violette Stilfield | 44 | wife | None | Illinois |
| 67 | Morris Almquist | 42 | head | Linotype Operator | Illinois |
| 68 | Helen Almquist | 43 | wife | None | Illinois |
| 69 | Jacqueline Almquist | 10 | daughter | None | Iowa |
| 70 | Carl P. Osterman | 70 | lodger | Janitor | Sweden |
| 71 | John Herman | 38 | head | Salesman-Driver | Illinois |
| 72 | Hazel Herman | 36 | wife | None | Illinois |
| 73 | Ronald Herman | 25 | son | None | Illinois |
| 74 | George Weber | 48 | head | Foundry Core Maker | Illinois |
| 75 | Anna M. A. Weber | 55 | wife | None | Illinois |
| 76 | John Kaskadden | 50 | head | Shop Checker | Illinois |
| 77 | Florence Kaskadden | 51 | wife | — | Canada English |
| 78 | Richard Kaskadden | 15 | son | — | Illinois |
| 79 | James Schutte | 35 | head | Physics Teacher | Iowa |
| 80 | Ethel Schutte | 32 | wife | None | Nebraska |
Pedigree Summary
William
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)