WM
William Montgomery — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Mateo-County, California
Our Model Tree links this William Montgomery across the 1920, 1930 and 1940 US Censuses in San-Mateo-County, California (XGBoost, ~Confirmed), with identified parents Edward & Helen — first a head (b.~1901), then head of a 6-person household.
Age 39
b. ~1901
Male
Head
Born: Colorado
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Mateo-County, California |
| Surname | Montgomery |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | Burlingame City |
| 1935 Residence (County) | San Mateo |
| Additional Details | |
| Occupation | Department Manager |
| Industry | Chamber of Commerce |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 5000 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Department Manager |
| Township / Ward | Burlingame City |
| Est. Birth Year | ~1901 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Carol Montgomery | Daughter | — | 7 | ~1933 |
| William Montgomery | Head | — | 39 | ~1901 |
| Lambert Montgomery | Other | — | 69 | ~1871 |
| Bruce Montgomery | Son | — | 6 | ~1934 |
| William Montgomery | Son | — | 9 | ~1931 |
| Marguerite Montgomery | Spouse | — | 36 | ~1904 |
Census Appearances
1920
Contra Costa, …
Son, age 18
Contra Costa, California · implied b. ~1902 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Montgomery |
| Given Name | William G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
San Francisco, …
Head, age 29
San Francisco, California · implied b. ~1901 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Montgomery |
| Given Name | William R. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Colorado |
| Age at First Marriage | 24 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Iowa |
| Occupation | Dept. Mgr. |
| Industry | Charles Brown |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 62.50 |
| Radio Set | R |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
San-Mateo-County, California
Head, age 39
San-Mateo-County, California · implied b. ~1901 — 6 household members
| Surname | Montgomery |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | Burlingame City |
| 1935 Residence (County) | San Mateo |
| Occupation | Department Manager |
| Industry | Chamber of Commerce |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 5000 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 3 locations, using XGBoost record linkage. Identified parents: father Edward Montgomery (~0.92 confidence) and mother Helen Montgomery (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Edward Montgomery
b. ~1863
Source father
● Household
· direct · ~0.92
Mother
Helen Montgomery
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Montgomery
Head · 1940 · age 39 · b. ~1901 · California
★ 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 — San-Mateo-County, California
Open full size
1940 US Federal Census — San-Mateo-County, California
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00332-00294)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Dan Grey | 70 | Head | Electrical Engineer | Indiana |
| 42 | Elsie A. Grey | 66 | Wife | — | England |
| 43 | Nan Grey | 32 | Daughter | — | California |
| 44 | Patrick Ann Mccurdy | 55 | Servant | Servant | Washington |
| 45 | Frank G. Stoner | 46 | Head | Enforcement Officer | Washington |
| 46 | Irene A. Stoner | 41 | Wife | — | Iowa |
| 47 | Shirley F. Stoner | 5 | Daughter | — | California |
| 48 | Theodore Young | 49 | Head | Superintendent | California |
| 49 | Laura G. Young | 44 | Wife | — | Washington |
| 50 | David Young | 14 | Son | — | California |
| 51 | Nancy Young | 11 | Daughter | — | California |
| 52 | Samuel A. Freeman | 46 | Head | Teacher | Wisconsin |
| 53 | Alice T. Freeman | 36 | Wife | — | California |
| 54 | Elsa A. Freeman | 10 | Daughter | — | California |
| 55 | Marilyn A. Freeman | 10 | Daughter | — | California |
| 56 | William T. Freeman | 9 | Son | — | California |
| 58 | George E. Jr. Robertson | 37 | Head | Salesman | Indiana |
| 59 | Margaret Robertson | 36 | Wife | — | England |
| 60 | Joan L. Robertson | 12 | Daughter | — | Indiana |
| 61 | Elizabeth A. Robertson | 1 | Daughter | — | California |
| 62 | William Montgomery THIS PERSON | 39 | Head | Department Manager | Colorado |
| 63 | Marguerite Montgomery | 36 | Wife | — | Oregon |
| 64 | William L. Montgomery | 9 | Son | — | California |
| 65 | Carol Montgomery | 7 | Daughter | — | California |
| 66 | Bruce E. Montgomery | 6 | Son | — | California |
| 67 | Lambert Ella G. Montgomery | 69 | Mother-in-law | — | California |
| 68 | Roy W. Holland | 34 | Head | Special Agent | Illinois |
| 69 | Georgia L. Q. Holland | 33 | Wife | — | Illinois |
| 70 | Mabel C. Van Horn | 52 | Mother-in-law | — | Illinois |
| 71 | Horton A. Mckim | 44 | Head | Assistant Manager | Nevada |
| 72 | Julia A. Q. Mckim | 40 | Wife | — | Michigan |
| 73 | Robert H. Mckim | 13 | Son | — | California |
| 74 | Patricia J. Mckim | 11 | Daughter | — | California |
| 75 | Albert A. Mckim | 88 | Father | — | California |
| 76 | Herman A. Scheer | 78 | Head | Part Time | California |
| 77 | Anna C. Scheer | 62 | Wife | — | California |
| 78 | George W. Bettencourt | 39 | Lodger | Laundry Driver | California |
| 79 | Irma Bettencourt | 40 | Lodger | Payroll Clerk | Oregon |
| 80 | Roderick J. Macdonald | 48 | Head | District Manager | Nova Scotia |
Pedigree Summary
William
Gen 1 · 2 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)