IW
Isaac Williams — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Fremont-County, Colorado
Our Model Tree links this Isaac Williams across the 1910, 1920, 1930 and 1940 US Censuses in Fremont-County, Colorado (XGBoost, ~Confirmed) — first a head (b.~1878), then head of a 4-person household.
Age 62
b. ~1878
Male
Head
Born: Wales
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Fremont-County, Colorado |
| Surname | Williams |
| Given Name | Isaac B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Wales |
| 1935 Residence (City) | Lincoln Park |
| 1935 Residence (County) | Fremont |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Miner |
| Industry | Coal mine |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 1050 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
| Occupation | Miner |
| Township / Ward | Lincoln Park |
| Est. Birth Year | ~1878 |
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 Isaac | Age | Birth yr |
|---|---|---|---|---|
| Martha Williams | Daughter | — | 26 | ~1914 |
| Opal Williams | Daughter | — | 31 | ~1909 |
| Isaac Williams | Head | — | 62 | ~1878 |
| Martha Williams | Spouse | — | 58 | ~1882 |
Census Appearances
1910
Kings, New …
Head, age 31
Kings, New York · implied b. ~1879 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Wales |
| Years Married | 13 |
| Year of Immigration | 1888 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Occupation | Bricklayer |
| Industry | New building |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
1920
Fremont, Colorado
Head, age 42
Fremont, Colorado · implied b. ~1878 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Isaac S |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Wales |
| Year of Immigration | 1887 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Occupation | Miner |
| Industry | Coal Mine |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Welsh |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth Country | Wales |
| Year of Naturalization | Un |
| Birthplace (normalized) | wales |
1930
Fremont, Colorado
Head, age 51
Fremont, Colorado · implied b. ~1879 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Isaac D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Wales |
| Naturalization Status | Naturalized |
| Year of Immigration | 1885 |
| Age at First Marriage | 22 |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Occupation | Foreman |
| Industry | Coal mine |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Welsh |
| Home Owned/Rented | O |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
1940
Fremont-County, Colorado
Head, age 62
Fremont-County, Colorado · implied b. ~1878 — 4 household members
| Surname | Williams |
| Given Name | Isaac B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Wales |
| 1935 Residence (City) | Lincoln Park |
| 1935 Residence (County) | Fremont |
| Naturalization Status | Naturalized |
| Occupation | Miner |
| Industry | Coal mine |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 1050 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
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 Isaac Williams across 4 US Census years (1910, 1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
Isaac Williams
Head · 1940 · age 62 · b. ~1878 · Colorado
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Fremont-County, Colorado
Open full size
1940 US Federal Census — Fremont-County, Colorado
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-00463-00363)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Horace L. Cordova | 11 | Son | — | Colorado |
| 42 | William J. Cordova | 8 | Son | — | Colorado |
| 43 | Dolores Cordova | 5 | Daughter | — | Colorado |
| 44 | Eleanor Cordova | 0 | Daughter | — | Colorado |
| 45 | Andrew C. Larsen | 72 | Head | Farmer | Denmark |
| 46 | Ahmed H. Garrett | 33 | Head | Laborer | Oklahoma |
| 47 | Lucille Garrett | 35 | Wife | — | Oklahoma |
| 48 | James Garrett | 19 | Son | Attendant | Oklahoma |
| 49 | Bonnie Garrett | 17 | Daughter | — | Oklahoma |
| 50 | Robert J. Jones | 55 | Head | Laborer | New York |
| 51 | Virginia Jones | 55 | Wife | — | Colorado |
| 52 | Robert W. Jones | 21 | Son | Apprentice Machinist | Colorado |
| 53 | Arnold Jones | 17 | Son | — | Colorado |
| 54 | Mary J. Jones | 15 | Daughter | — | Colorado |
| 55 | Glenn A. Jones | 12 | Son | — | Colorado |
| 56 | Cash H. Myers | 57 | Head | Farmer | Ohio |
| 57 | Lena B. Myers | 57 | Wife | — | Ohio |
| 58 | John Weinheimer | 72 | Head | Farmer | Ohio |
| 59 | Isaac B. Williams THIS PERSON | 62 | Head | Miner | Wales |
| 60 | Martha Williams | 58 | Wife | — | Illinois |
| 61 | Opal Williams | 31 | Daughter | Stenographer | Colorado |
| 62 | Martha D. Williams | 26 | Daughter | Saleslady | Colorado |
| 63 | Claude Metheney | 49 | Head | Merchant | Arkansas |
| 64 | Ethel Metheney | 48 | Wife | — | Arkansas |
| 65 | Norman Metheney | 19 | Son | Attendant | Wyoming |
| 66 | Neal Metheney | 17 | Son | — | Wyoming |
| 67 | Joe Gullo | 61 | Head | Miner | Italy |
| 68 | Rose Gullo | 57 | Wife | — | Italy |
| 69 | David W. Dunlap | 61 | Head | Farmer | Kansas |
| 70 | Grace E. Dunlap | 58 | Wife | — | Kansas |
| 71 | Glen C. Dunlap | 14 | Son | — | Colorado |
| 72 | Charles Castagna | 43 | Head | Trucker | Italy |
| 73 | Angella Castagna | 39 | Wife | — | Colorado |
| 74 | Mary M. Castagna | 17 | Daughter | — | Colorado |
| 75 | Lawrence Castagna | 15 | Son | — | Colorado |
| 76 | Maude Simpson | 53 | Head | Farmer | Kansas |
| 77 | Marie Simpson | 16 | Daughter | — | Colorado |
| 78 | Warren Kleinkens | 30 | Head | Laborer | Colorado |
Related Census Records
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)