IB
Isaac Brown — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this Isaac Brown across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 5-person household.
Age 70
b. ~1870
Male
Head
Born: Russia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Brown |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Russia |
| 1935 Residence (City) | Delaware |
| 1935 Residence (County) | Delaware |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Proprietor |
| Industry | Auto Supplies |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
| Occupation | Proprietor |
| Est. Birth Year | ~1870 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Isaac Brown | Head | — | 70 | ~1870 |
| Walter Brown | Son | — | 36 | ~1904 |
| Edwin Brown | Son | — | 27 | ~1913 |
| Abram Brown | Son | — | 41 | ~1899 |
| Dora Brown | Spouse | — | 66 | ~1874 |
Census Appearances
1900
Philadelphia, Pennsylvania
Head, age 31
Philadelphia, Pennsylvania · implied b. ~1869 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Russia |
| Birth Month | Mar |
| Birth Year | 1869 |
| Year of Immigration | 1891 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Occupation | Cigar maker |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
1910
Philadelphia, Pennsylvania
Head, age 40
Philadelphia, Pennsylvania · implied b. ~1870 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Russia |
| Years Married | 16 |
| Year of Immigration | 1901 |
| Naturalization Status | Alien |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Occupation | Driver |
| Industry | Fish House |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
1920
Philadelphia, Pennsylvania
Head, age 50
Philadelphia, Pennsylvania · implied b. ~1870 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Isaac |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Russia |
| Year of Immigration | 1892 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Russian |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Russia |
| Year of Naturalization | 1911 |
| Birthplace (normalized) | russia |
1930
Philadelphia, Pennsylvania
Head, age 61
Philadelphia, Pennsylvania · implied b. ~1869
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Brown |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Russia |
| Naturalization Status | Naturalized |
| Year of Immigration | 1892 |
| Age at First Marriage | 20 |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Occupation | Manufacturer |
| Industry | H. S. Machinery |
| Class of Worker | E |
| Can Read/Write | Yes |
| Mother Tongue | Yiddish |
| Home Owned/Rented | O |
| Home Value / Rent | 7000 |
| Radio Set | R |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
1940
Delaware-County, Pennsylvania
Head, age 70
Delaware-County, Pennsylvania · implied b. ~1870 — 5 household members
| Surname | Brown |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Russia |
| 1935 Residence (City) | Delaware |
| 1935 Residence (County) | Delaware |
| Naturalization Status | Naturalized |
| Occupation | Proprietor |
| Industry | Auto Supplies |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
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 Isaac Brown across 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Isaac Brown
Head · 1940 · age 70 · b. ~1870 · 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 — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03498-00092)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Anna D. Snyder | 39 | Wife | — | Pennsylvania |
| 42 | Thomas Snyder | 10 | Son | — | Pennsylvania |
| 43 | Sydney Sutcliffe | 46 | Head | Accountant | England |
| 44 | Dora Sutcliffe | 46 | Wife | — | England |
| 45 | Patricia Sutcliffe | 19 | Daughter | — | England |
| 46 | Brian Sutcliffe | 17 | Son | — | England |
| 47 | Lillian Wallace | 72 | Mother in law | — | England |
| 48 | Thomas Pappas | 33 | Head | Typist | Greece |
| 49 | Artimica Pappas | 30 | Wife | Hatter | Greece |
| 50 | William Pappas | 6 | Son | — | New York |
| 51 | Sarah Dougherty | 53 | Head | — | Pennsylvania |
| 52 | Daniel Dougherty | 39 | Son | Attendant | Pennsylvania |
| 53 | Catherine Dougherty | 31 | Daughter | Pharmacist | Pennsylvania |
| 54 | Mary Dougherty | 25 | Daughter | Teacher | Pennsylvania |
| 55 | Henry Dougherty | 24 | Son | Waiter | Pennsylvania |
| 56 | Isaac B. Woody | 48 | Head | Proprietor | Indiana |
| 57 | Eleanor Woody | 46 | Wife | — | Indiana |
| 58 | Elinore Woody | 18 | Daughter | — | Pennsylvania |
| 59 | Mary Woody | 15 | Daughter | — | Pennsylvania |
| 60 | Isaac Brown THIS PERSON | 70 | Head | Proprietor | Russia |
| 61 | Dora Brown | 66 | Wife | — | Russia |
| 62 | Abram Brown | 41 | Son | Salesman | Pennsylvania |
| 63 | Walter Brown | 36 | Son | Teacher | Pennsylvania |
| 64 | Edwin Brown | 27 | Son | Salesman | Pennsylvania |
| 65 | William Boyette | 46 | Head | Salesman | New Jersey |
| 66 | Pearl Boyette | 43 | Wife | — | New Jersey |
| 67 | Charles Boyette | 22 | Son | Shipping Clerk | New Jersey |
| 68 | Thomas Boyette | 13 | Son | — | New Jersey |
| 69 | David H. Smyser | 64 | Head | Draftsman | Pennsylvania |
| 70 | Kathryn Smyser | 54 | Wife | — | Pennsylvania |
| 71 | David C. Smyser | 23 | Son | Salesman | Texas |
| 72 | Ivan Van Rodale | 45 | Head | Vocal Teacher | New Jersey |
| 73 | Sarah Van Rodale | 71 | Mother | — | New Jersey |
| 74 | Daniel Coyle | 25 | Lodger | Salesman | New Jersey |
| 75 | James Macwhinney | 59 | Head | Salesman | England |
| 76 | Eunice Macwhinney | 43 | Wife | — | Missouri |
| 77 | Maria Goodfellow | 62 | Lodger | Saleswoman | Pennsylvania |
| 78 | John Clutcher | 48 | Head | Manufacturer | Pennsylvania |
| 79 | Ruth Clutcher | 45 | Wife | Music Teacher | Pennsylvania |
| 80 | Helen M. Hibbs | 42 | Head | — | Pennsylvania |
Related Census Records
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)