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Robert Jacobs — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Robert Jacobs across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents John & Sidney — first a son (b.~1919), then head of a 4-person household.
Age 21
b. ~1919
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Jacobs |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | accountant |
| Industry | Dept store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 400 |
| Highest Grade | C 1 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Accountant |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1919 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Jacobs | Son | — | 21 | ~1919 |
| Dorris Jacobs | Daughter | — | 18 | ~1922 |
| Helen Jacobs | Spouse | — | 49 | ~1891 |
| Sidney Jacobs | Head | — | 48 | ~1892 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age
Allegheny, Pennsylvania · implied b. ~1920 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | Robert C. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Lehigh, Pennsylvania
Son, age 11
Lehigh, Pennsylvania · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 21
Allegheny-County, Pennsylvania · implied b. ~1919 — 4 household members
| Surname | Jacobs |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | accountant |
| Industry | Dept store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 400 |
| Highest Grade | C 1 |
| 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 Jacobs across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father John Jacobs (~0.92 confidence) and father Sidney Jacobs (~0.92 confidence) and mother Edith Jacobs (~0.92 confidence) and mother Helen Jacobs (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Jacobs
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Sidney Jacobs
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Edith Jacobs
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Helen Jacobs
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Jacobs
Son · 1940 · age 21 · b. ~1919 · Pennsylvania
★ You are viewing this record
Sibling
Dorris Jacobs
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
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
39 people indexed on this census page (nara:1940:m-t0627-03664-00128)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Max R Cohen | 43 | Head | Accountant | Massachusetts |
| 42 | Molly S Cohen | 35 | Wife | — | Pennsylvania |
| 43 | Robert A Cohen | 11 | Son | — | Pennsylvania |
| 44 | Beatrice R Cohen | 8 | Daughter | — | Pennsylvania |
| 45 | Arthur J Cohen | 4 | Son | — | Pennsylvania |
| 46 | Margaret Willis | 20 | Maid | Maid | Pennsylvania |
| 47 | John F Cochran | 55 | Head | Salesman | Pennsylvania |
| 48 | Josephine G Cochran | 57 | Wife | — | Pennsylvania |
| 49 | James G Cochran | 28 | Son | Salesman | Pennsylvania |
| 50 | James W Grant | 83 | Father-in-law | Carpenter | Scotland |
| 51 | James W Mccann | 47 | Head | Mail Carrier | Pennsylvania |
| 52 | Elizabeth C Mccann | 47 | Wife | — | Pennsylvania |
| 53 | Joseph J Kenny | 30 | Head | Manager | Pennsylvania |
| 54 | Marie M Kenny | 25 | Wife | — | Pennsylvania |
| 55 | Patricia A Kenny | 2 | Daughter | — | Pennsylvania |
| 56 | Thomas F Whelan | 33 | Head | Plumber | Pennsylvania |
| 57 | Alice Whelan | 32 | Wife | Ass. Manager | Pennsylvania |
| 59 | Harry M Loy | 51 | Head | Packer | Maryland |
| 60 | Anna H Loy | 49 | Wife | — | Pennsylvania |
| 61 | Janet Hausenleiter | 36 | Lodger | Stenographer | Pennsylvania |
| 62 | Ernest Prince | 38 | Head | Wholesale Construction | Pennsylvania |
| 63 | Pearl E Prince | 35 | Wife | — | Michigan |
| 64 | Jerry S Prince | 12 | Son | — | Pennsylvania |
| 65 | Gloria J Prince | 9 | Daughter | — | Pennsylvania |
| 66 | Edward H Goldberg | 28 | Head | Accountant | Pennsylvania |
| 67 | Florence Goldberg | 26 | Wife | — | New York |
| 68 | Robert M Stahl | 38 | Head | Manager | Pennsylvania |
| 69 | Isobelle Stahl | 28 | Wife | — | Pennsylvania |
| 70 | Sidney Jacobs | 48 | Head | Manager | Pennsylvania |
| 71 | Helen M Jacobs | 49 | Wife | — | New Jersey |
| 72 | Robert Jacobs THIS PERSON | 21 | Son | Accountant | Pennsylvania |
| 73 | Dorris Jacobs | 18 | Daughter | — | Pennsylvania |
| 74 | Elizabeth Dickie | 42 | Head | — | Pennsylvania |
| 75 | William G Dickie | 19 | Son | — | Pennsylvania |
| 76 | Otto Hohing | 30 | Head | Bookkeeper | Pennsylvania |
| 77 | Lucille Hohing | 28 | Wife | — | Pennsylvania |
| 78 | Joseph M Katy | 57 | Head | Manager | Hungary |
| 79 | Esther Katy | 55 | Wife | — | Ohio |
| 80 | Sarah Weintraub | 35 | Lodger | Social Worker | Ohio |
Pedigree Summary
Robert + 1 sibling
Gen 1 · 4 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)