IW
Isaac Williams — 1940 US Census Record
Model Tree available1940 United States Federal Census · York-County, Virginia
Our Model Tree links this Isaac Williams across the 1920, 1930 and 1940 US Censuses in York-County, Virginia (XGBoost, ~Confirmed), with identified parents Andrew & Mary — first a son (b.~1908), then head of a 5-person household.
Age 32
b. ~1908
Male
Son
Born: Virginia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | York-County, Virginia |
| Surname | Williams |
| Given Name | Isaac Lee |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Virginia |
| 1935 Residence (City) | Nelson Magd. |
| 1935 Residence (County) | York |
| Additional Details | |
| Occupation | Home Undertaker |
| Industry | Self |
| Class of Worker | OA |
| Hours Worked | 40 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
| Occupation | Home Undertaker |
| Township / Ward | Nelson Magd |
| Est. Birth Year | ~1908 |
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 Isaac | Age | Birth yr |
|---|---|---|---|---|
| Andrew Williams | Head | — | 65 | ~1875 |
| Grandson James | Other | — | — | |
| Isaac Williams | Son | — | 32 | ~1908 |
| Mary Williams | Spouse | — | 61 | ~1879 |
| Geraldine Williams | Spouse | — | 30 | ~1910 |
Census Appearances
1920
Charles, Virginia
Son, age 12
Charles, Virginia · implied b. ~1908 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1930
New Kent, …
Son, age 21
New Kent, Virginia · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Isaac Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Occupation | Servant |
| Industry | House Work |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1940
York-County, Virginia
Son, age 32
York-County, Virginia · implied b. ~1908 — 5 household members
| Surname | Williams |
| Given Name | Isaac Lee |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Virginia |
| 1935 Residence (City) | Nelson Magd. |
| 1935 Residence (County) | York |
| Occupation | Home Undertaker |
| Industry | Self |
| Class of Worker | OA |
| Hours Worked | 40 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
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 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Andrew Williams (~0.92 confidence) and mother Mary Williams (~0.92 confidence) and mother Ida Williams (~0.92 confidence) and father Isaac Williams (~0.92 confidence) and father Goodman Williams (~0.92 confidence) and mother Ada Williams (~0.92 confidence) and mother Geraldine Williams (~0.50 confidence). The pedigree spans 1 generation with 7 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.86
Father
Andrew Williams
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Mary Williams
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
Ida Williams
b. ~1880
Source mother
● Household
· direct · ~0.92
Father
Isaac Williams
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Goodman Williams
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Ada Williams
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Geraldine Williams
b. ~1910
Source mother
● Household
· direct · ~0.5
This person
Anchor record
Isaac Williams
Son · 1940 · age 32 · b. ~1908 · Virginia
★ 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 — York-County, Virginia
Open full size
1940 US Federal Census — York-County, Virginia
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04303-00768)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lawrence Valentine | 35 | Head | Laborer | Virginia |
| 42 | James Jones | 42 | Head | Project Asst. | Virginia |
| 43 | Susie Jones | 35 | Wife | Home | No. Car. |
| 44 | James Kelley | 42 | Boarder | C.C. Camp | Virginia |
| 45 | Annie Kelley | 22 | Wife | Home | Virginia |
| 46 | Oscar Dennis | 65 | Head | Laborer | Virginia |
| 47 | Mary Dennis | 65 | Wife | Home | Virginia |
| 48 | George Dennis | 21 | Son | Laborer | Virginia |
| 49 | Wm. H. Wells | 48 | Head | Hospital Tractor Operator | No. Carolina |
| 50 | Dessie Wells | 38 | Wife | Home | Georgia |
| 51 | Willie Wells | 15 | Son | School | No. Carolina |
| 52 | James L. Washington | 45 | Head | Home Laborer | Virginia |
| 53 | Sadie Washington | 40 | Wife | Home | Virginia |
| 54 | Anace Washington | 22 | Son | Cement Worker | Virginia |
| 55 | James Washington | 18 | Son | School | Virginia |
| 56 | Howard Washington | 10 | Son | School | Virginia |
| 57 | Lucile Washington | 24 | Daughter | Housework | Virginia |
| 58 | Louise Washington | 13 | Daughter | School | Virginia |
| 59 | Walter E. Lewis | 65 | Head | Laborer | Virginia |
| 60 | Marian Lewis | 72 | Wife | Home | Virginia |
| 61 | Bernard Lewis | 27 | Son | Farm | Virginia |
| 62 | John R. Harrison | 27 | Head | Teacher | Virginia |
| 63 | Lena C. Harrison | 30 | Wife | Home | Virginia |
| 64 | Mayree Yvonne Harrison | 0 | Daughter | Infant | Virginia |
| 65 | Dorothy M. Smith | 26 | Boarder | Teacher | Virginia |
| 66 | Dorothy E. Lewis | 23 | Boarder | Teacher | Virginia |
| 67 | Madeline Johnson | 32 | Boarder | Teacher | Virginia |
| 68 | Lt. Wm. F. Grisley | 29 | Head | Com. Officer | Virginia |
| 69 | Melba Grisley | 25 | Wife | Home | Philadelphia |
| 70 | James Calvin Grisley | 3 | Son | Infant | Virginia |
| 71 | Raymond A. Wilhelm | 40 | Head | Landscape Archt. | Iowa |
| 72 | Margaret L. Wilhelm | 41 | Wife | Home | Illinois |
| 73 | Wm. H. 3Rd Weaver | 16 | Step son | School | No. Car. |
| 74 | June S. Luttrell | 78 | Mother in law | Home | Maryland |
| 75 | Benj. F. Rowe | 24 | Head | Home Serv. Sta. Mgr. | Virginia |
| 76 | Andrew Williams | 65 | Head | Retired | Virginia |
| 77 | Mary Williams | 61 | Wife | Home | Virginia |
| 78 | Isaac Lee Williams THIS PERSON | 32 | Son | Home Undertaker | Virginia |
| 79 | Geraldine Williams | 30 | Wife | Home | Virginia |
| 80 | Grandson James | None | M | — | — |
Pedigree Summary
Isaac
Gen 1 · 7 parents
~0.86
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)