WS
William Simms — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-County, Maryland
Our Model Tree links this William Simms across the 1910, 1920, 1930 and 1940 US Censuses in Baltimore-County, Maryland (XGBoost, ~Confirmed), with identified parents George & William — first a head (b.~1905), then head of a 4-person household.
Age 35
b. ~1905
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-County, Maryland |
| Surname | Simms |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Timonium |
| 1935 Residence (County) | Baltimore |
| Additional Details | |
| Occupation | Police Sergeant |
| Industry | Town police |
| Class of Worker | GW |
| Hours Worked | 78 |
| Income (1939) | 1884 |
| Highest Grade | Hs 1 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Police Sergeant |
| Township / Ward | 9Th Election Dist |
| Est. Birth Year | ~1905 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Dora Simms | Spouse | — | 30 | ~1910 |
| William Simms | Head | — | 35 | ~1905 |
| Mary Simms | Daughter | — | 11 | ~1929 |
| Ruth Simms | Daughter | — | 8 | ~1932 |
Census Appearances
1910
Baltimore, Maryland
Son, age 6
Baltimore, Maryland · implied b. ~1904 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simms |
| Given Name | William Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1920
Baltimore, Maryland
Son, age 15
Baltimore, Maryland · implied b. ~1905 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simms |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 25
Baltimore, Maryland · implied b. ~1905 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simms |
| Given Name | William J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 21 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Farmer |
| Industry | Truck Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Head, age 35
Baltimore-County, Maryland · implied b. ~1905 — 4 household members
| Surname | Simms |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Timonium |
| 1935 Residence (County) | Baltimore |
| Occupation | Police Sergeant |
| Industry | Town police |
| Class of Worker | GW |
| Hours Worked | 78 |
| Income (1939) | 1884 |
| Highest Grade | Hs 1 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Simms across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Simms (~0.92 confidence) and father William Simms (~0.92 confidence) and father William Simms (~0.92 confidence) and mother Elsie Simms (~0.92 confidence) and mother Magdalen Simms (~0.92 confidence) and mother Mary Simms (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Simms
b. ~1883
Source father
● Household
· direct · ~0.92
Father
William Simms
b. ~1877
Source father
● Household
· direct · ~0.92
Father
William Simms
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Elsie Simms
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Magdalen Simms
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Mary Simms
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Simms
Head · 1940 · age 35 · b. ~1905 · Maryland
★ 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 — Baltimore-County, Maryland
Open full size
1940 US Federal Census — Baltimore-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01505-00027)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Wesley Allen | 47 | Head | Truck Driver | New York |
| 2 | Estelle Allen | 45 | Wife | — | Maryland |
| 3 | William W Allen | 20 | Son | Attendant | Maryland |
| 4 | William Myers | 40 | Head | Assembler | Maryland |
| 5 | Helen Myers | 38 | Wife | — | Maryland |
| 6 | May Myers | 18 | Daughter | Clerk | Maryland |
| 7 | Frances Myers | 16 | Daughter | — | Maryland |
| 8 | Windsor Dunham | 43 | Head | Machinist | New York |
| 9 | Anna Dunham | 42 | Wife | — | New York |
| 10 | Russell Dunham | 17 | Son | Errand Boy | New York |
| 11 | Adeline Dunham | 14 | Daughter | — | Maryland |
| 12 | Windsor Jr. Dunham | 4 | Son | — | Maryland |
| 13 | William Simms THIS PERSON | 35 | Head | Police Sergeant | Maryland |
| 14 | Dora Simms | 30 | Wife | — | Maryland |
| 15 | Mary Simms | 11 | Daughter | — | Maryland |
| 16 | Ruth Simms | 8 | Daughter | — | Maryland |
| 17 | Clarence Simms | 44 | Head | Fireman | Maryland |
| 18 | Margaret Simms | 40 | Wife | — | Maryland |
| 19 | Margaret Simms | 16 | Daughter | — | Maryland |
| 20 | Clarence Simms | 14 | Son | — | Maryland |
| 21 | Dorothy Simms | 12 | Daughter | — | Maryland |
| 22 | Stewart Simms | 10 | Son | — | Maryland |
| 23 | Leo Simms | 8 | Son | — | Maryland |
| 24 | John Simms | 5 | Son | — | Maryland |
| 25 | Howard Treadwell | 69 | Head | Laborer | Maryland |
| 26 | Julia Treadwell | 54 | Wife | — | Maryland |
| 27 | William Treadwell | 24 | Son | Carpenter | Maryland |
| 28 | James Johnson | 36 | Head | Storekeeper | Maryland |
| 29 | Katie M. Johnson | 42 | Wife | — | Maryland |
| 30 | James Jr. Johnson | 11 | Son | — | Maryland |
| 31 | William Johnson | 9 | Son | — | Maryland |
| 32 | Bertha Farry | 65 | Head | — | Maine |
| 33 | Graham Cranston | 34 | Head | Carpenter & Stone Mason | Maryland |
| 34 | Hazel Cranston | 31 | Wife | — | Maryland |
| 35 | Graham Jr. Cranston | 10 | Son | — | Maryland |
| 36 | Patricia Cranston | 10 | Daughter | — | Maryland |
| 37 | Mary Lou Cranston | 9 | Daughter | — | Maryland |
| 38 | Thomas Cranston | 1 | Son | — | Maryland |
| 39 | Timothy Cranston | 1 | Son | — | Maryland |
| 40 | Oscar P. Brown | 37 | Head | — | Virginia |
Pedigree Summary
William
Gen 1 · 6 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)