RA
Robert Armstrong — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Robert Armstrong across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents E & Jos — first a son (b.~1911), then head of a 2-person household.
Age 29
b. ~1911
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Armstrong |
| Given Name | Robert C. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | clerk |
| Industry | accounting |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Clerk |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1911 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| E Armstrong | Head | — | 65 | ~1875 |
| Robert Armstrong | Son | — | 29 | ~1911 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 9
Allegheny, Pennsylvania · implied b. ~1911 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Robert E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 19
Allegheny, Pennsylvania · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Robert E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Electrician |
| Industry | Electric Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 29
Allegheny-County, Pennsylvania · implied b. ~1911 — 2 household members
| Surname | Armstrong |
| Given Name | Robert C. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | clerk |
| Industry | accounting |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | Hs 4 |
| 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 Robert Armstrong across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother E Armstrong (~0.92 confidence) and father Jos Armstrong (~0.92 confidence) and mother Mary Armstrong (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
E Armstrong
b. ~1875
Source mother
● Household
· direct · ~0.92
Father
Jos Armstrong
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Mary Armstrong
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Armstrong
Son · 1940 · age 29 · b. ~1911 · 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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03662-00361)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elizabeth R. Montgomery | 64 | aunt | Librarian-Periodicals | Pennsylvania |
| 2 | Bessie Brison | 46 | sister | Assistant In Library | Pennsylvania |
| 3 | Barbara Russell | 34 | housekeeper | Housekeeper | Pennsylvania |
| 4 | Mary B. Russell | 10 | housekeeper | — | Pennsylvania |
| 5 | James O. Challanor | 53 | head | Manager | Pennsylvania |
| 6 | Lilly C. Challanor | 49 | wife | — | Ohio |
| 7 | Catheryn Challanor | 19 | daughter | — | Pennsylvania |
| 8 | James J. Carey | 63 | head | Night-Watchman | Pennsylvania |
| 9 | Elizabeth Carey | 62 | wife | — | Pennsylvania |
| 10 | James F. Carey | 34 | son | Salesman | Pennsylvania |
| 11 | John H. Carey | 29 | son | Common Laborer | Pennsylvania |
| 12 | Rose Rossler | 61 | lodger | Salesmanager | Pennsylvania |
| 13 | Emma Gerhardt | 34 | head | Seamstress | Pennsylvania |
| 14 | Howard Menck | 33 | brother-in-law | Teacher | Pennsylvania |
| 15 | Amelie Menck | 32 | sister | Operator Comptometer | Pennsylvania |
| 16 | Louis Victorhous | 56 | head | Proprietor | Russia |
| 17 | Catherine Victorhous | 47 | wife | Saleswoman | Russia |
| 18 | Ruth Victorhous | 21 | daughter | — | Pennsylvania |
| 19 | Adeline Victorhous | 18 | daughter | — | Pennsylvania |
| 20 | Robert T. Reynolds | 67 | head | Janitor | Maryland |
| 21 | Mary Reynolds | 74 | wife | — | Maryland |
| 22 | Martha A. Reynolds | 30 | daughter | Stenographer | Maryland |
| 23 | E. Armstrong | 65 | head | — | West Virginia |
| 24 | Robert C. Armstrong THIS PERSON | 29 | son | Clerk | Pennsylvania |
| 25 | A. E. Freni | 70 | head | Teacher | Holland |
| 26 | Ida M. Freni | 52 | wife | — | Holland |
| 27 | Esther J. Freni | 27 | daughter | Teacher | New York |
| 28 | Eleanor M. Riesmeyer | 36 | head | Stenographer | Pennsylvania |
| 29 | John R. Riesmeyer | 71 | father | Salesmanager | Pennsylvania |
| 30 | Alice Riesmeyer | 45 | sister | — | Pennsylvania |
| 31 | Florence M. Riesmeyer | 43 | sister | Saleslady | Pennsylvania |
| 32 | Lucas E. Finney | 49 | head | Chief Clerk | Pennsylvania |
| 33 | Laura Finney | 50 | wife | — | Pennsylvania |
| 34 | Lucas Finney | 20 | son | — | Pennsylvania |
| 35 | Maurice Kohner | 45 | head | Salesman Appraiser | Washington D.C. |
| 36 | Bertha E. Kohner | 37 | wife | Demonstrator | Virginia |
| 37 | Constance A. Kohner | 13 | daughter | — | Pennsylvania |
| 38 | Josephine Kohner | 10 | daughter | — | Pennsylvania |
| 39 | Rachael B. Ezekiel | 69 | mother-in-law | — | South Carolina |
| 40 | Robert Wakefield | 31 | head | Salesman | Illinois |
Pedigree Summary
Robert
Gen 1 · 3 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)