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William Robbins — 1940 US Census Record
Model Tree available1940 United States Federal Census · Montgomery-County, Pennsylvania
Our Model Tree links this William Robbins across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Sarah & Annie — first a son (b.~1913), then head of a 2-person household.
Age 27
b. ~1913
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Pennsylvania |
| Surname | Robbins |
| Given Name | William A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Norristown |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Machine Hand |
| Industry | Woolen Mill |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 840 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Machine Hand |
| Township / Ward | Norristown |
| Est. Birth Year | ~1913 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Robbins | Son | — | 27 | ~1913 |
| Joseph Robbins | Head | — | 74 | ~1866 |
Census Appearances
1920
Montgomery, Pennsylvania
Son, age 6
Montgomery, Pennsylvania · implied b. ~1914 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robbins |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Montgomery, Pennsylvania
Son, age 16
Montgomery, Pennsylvania · implied b. ~1914 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robbins |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Age at First Marriage | W |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Deliverer |
| Industry | Dairy route |
| Class of Worker | 4590 |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Montgomery-County, Pennsylvania
Son, age 27
Montgomery-County, Pennsylvania · implied b. ~1913 — 2 household members
| Surname | Robbins |
| Given Name | William A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Norristown |
| 1935 Residence (County) | Montgomery |
| Occupation | Machine Hand |
| Industry | Woolen Mill |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 840 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Robbins across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Sarah Robbins (~0.83 confidence) and mother Annie Krusem (~0.83 confidence) and father Joseph Robbins (~0.92 confidence) and father Clarence Robbins (~0.92 confidence) and father Francis Robbins (~0.92 confidence) and mother Martha Robbins (~0.92 confidence). The pedigree spans 2 generations with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.89
Mother
Sarah Robbins
b. ~1854
Source father>mother
● Household
· direct · ~0.83
Mother
Annie Krusem
b. ~1866
Source father>mother
● Household
· direct · ~0.83
Father
Joseph Robbins
b. ~1866
Source father
● Household
· direct · ~0.92
Father
Clarence Robbins
b. ~1892
Source father
● Household
· direct · ~0.92
Father
Francis Robbins
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Martha Robbins
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Robbins
Son · 1940 · age 27 · b. ~1913 · Pennsylvania
★ 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 — Montgomery-County, Pennsylvania
Open full size
1940 US Federal Census — Montgomery-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03581-00540)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret Myers | 18 | Daughter | — | Pennsylvania |
| 2 | Charles Myers | 17 | Son | — | Pennsylvania |
| 3 | Mary Jane Myers | 2 | Daughter | — | Pennsylvania |
| 4 | Andrew Constairs | 58 | Head | Laborer | Scotland |
| 5 | Bessie Constairs | 54 | Wife | House Worker | Scotland |
| 6 | Edward Walker | 57 | Head | Baker | Pennsylvania |
| 7 | J. C. Evans | 51 | Lodger | Carp | Illinois |
| 8 | Elmer H. Pooler | 41 | Head | Baker | Pennsylvania |
| 9 | William Fratt | 58 | Head | Laborer | Pennsylvania |
| 10 | Blanche Beck | 57 | Head | — | Pennsylvania |
| 11 | John Monahan | 70 | Head | — | Pennsylvania |
| 12 | George Cunningham | 66 | Head | Laborer | Pennsylvania |
| 13 | James G. Mcnalley | 51 | Head | Fireman | Pennsylvania |
| 14 | Joseph Robbins | 74 | Head | — | Pennsylvania |
| 15 | William A. Robbins THIS PERSON | 27 | Son | Machine Hand | Pennsylvania |
| 16 | Ray J. Smith | 53 | Head | Watchman | Maryland |
| 17 | Anna Smith | 54 | Wife | Ironer | Pennsylvania |
| 18 | Walter J. Reid | 28 | Head | Skater | Pennsylvania |
| 19 | Katherine Reid | 32 | Wife | Looper | Pennsylvania |
| 20 | Stanley Reid | 6 | Son | — | Pennsylvania |
| 21 | Walter Reid | 5 | Son | — | Pennsylvania |
| 22 | Marie Anna Reid | 3 | Daughter | — | Pennsylvania |
| 23 | Charles H. Hartman | 44 | Head | Machinist | Maryland |
| 24 | Mary Hartman | 42 | Wife | — | Pennsylvania |
| 25 | Charles N. Jr. Hartman | 18 | Son | Core Operator | Pennsylvania |
| 26 | Joseph H. Hartman | 11 | Son | — | Pennsylvania |
| 27 | Theodore N. Hartman | 7 | Son | — | Pennsylvania |
| 28 | John Smith | 52 | Head | Painter | Pennsylvania |
| 29 | Anna Smith | 39 | Wife | — | Pennsylvania |
| 30 | Gertrude Smith | 17 | Daughter | Waitress | Pennsylvania |
| 31 | Verne Harris | 37 | Head | Mixer | Pennsylvania |
| 32 | Thelma Harris | 28 | Wife | — | Pennsylvania |
| 33 | Anna Carson | 72 | Head | — | Pennsylvania |
| 34 | Nancy Carson | 18 | Daughter | Dresser | Pennsylvania |
| 35 | John Douglass | 71 | Lodger | Janitor | Pennsylvania |
| 36 | Elwood J. Finley | 55 | Lodger | Laborer | Pennsylvania |
| 37 | Stella Eisenhart | 32 | Lodger | Waitress | Pennsylvania |
| 38 | Margaret Seebers | 53 | Lodger | — | Pennsylvania |
| 39 | George M. Nummerer | 49 | Head | Truck Driver | Pennsylvania |
| 40 | Ellie M. Nummerer | 47 | Wife | — | Pennsylvania |
Pedigree Summary
William
Gen 1 · 4 parents
~0.92
Gen 2 · 2 grandparents
~0.83
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)