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William Warren — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this William Warren across the 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed), with identified parents Hannah & Reina — first a son (b.~1908), then head of a 4-person household.
Age 32
b. ~1908
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | Warren |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Hamilton Twp. |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Occupation | Electrician |
| Industry | Contract Electrician |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 440 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Electrician |
| Township / Ward | Hamilton Twp |
| Est. Birth Year | ~1908 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Ethel Warren | Daughter | — | 37 | ~1903 |
| Mary Warren | Daughter | — | 38 | ~1902 |
| Hannah Warren | Head | — | 72 | ~1868 |
| William Warren | Son | — | 32 | ~1908 |
Census Appearances
1920
Mercer, New …
Son, age 11
Mercer, New Jersey · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Warren |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Mercer, New …
Son, age 21
Mercer, New Jersey · implied b. ~1909 — 49 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Warren |
| Given Name | William J. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Pennsylvania |
| Occupation | Salesman |
| Industry | Life Insurance |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Mercer-County, New …
Son, age 32
Mercer-County, New Jersey · implied b. ~1908 — 4 household members
| Surname | Warren |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Hamilton Twp. |
| 1935 Residence (County) | Mercer |
| Occupation | Electrician |
| Industry | Contract Electrician |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 440 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 Warren across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Hannah Warren (~0.92 confidence) and mother Reina Warren (~0.92 confidence) and father William Warren (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Hannah Warren
b. ~1868
Source mother
● Household
· direct · ~0.92
Mother
Reina Warren
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
William Warren
b. ~1884
Source father
● Household
· direct · ~0.92
This person
Anchor record
William Warren
Son · 1940 · age 32 · b. ~1908 · New Jersey
★ You are viewing this record
Sibling
Ethel Warren
Sibling · 1940 · age 37
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Warren
Sibling · 1940 · age 38
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 — Mercer-County, New Jersey
Open full size
1940 US Federal Census — Mercer-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02356-00876)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Sabor | 49 | Wife | — | Delaware |
| 42 | Steven Jr. Sabor | 24 | Son | Insurance Agent & Helper | New Jersey |
| 43 | Joseph Mckensey | 42 | Brother in law | Insurance Agent | New Jersey |
| 44 | Elsie Mckensey | 42 | Sister in law | — | Hungary |
| 45 | William Brindley | 74 | Head | — | New Jersey |
| 46 | Alice Tilton | 59 | Head | — | England |
| 47 | Harold Tilton | 24 | Son | Preparator | New Jersey |
| 48 | Arthur Tilton | 20 | Son | Truck Driver | New Jersey |
| 49 | Eleanor Tilton | 19 | Daughter | Stenographer | New Jersey |
| 50 | Sarah Povitt | Porvitt | 71 | Mother | — | England |
| 51 | Thomas Malloy | 25 | Head | Cashier Clerk | New Jersey |
| 52 | Ruby Malloy | 24 | Wife | — | New Jersey |
| 53 | Vincent Malloy | 5 | Son | — | New Jersey |
| 54 | John Mcdonough | 46 | Head | Ticket Seller | New Jersey |
| 55 | Henrietta Mcdonough | 45 | Wife | — | New Jersey |
| 56 | Lida Mcdonough | 18 | Daughter | New Worker | New Jersey |
| 57 | Morris Yost | 24 | Head | Cashier | New Jersey |
| 58 | Rose Yost | 21 | Wife | — | New York |
| 59 | Albert Tilton | 76 | Head | Domestic Worker | New Jersey |
| 60 | Anna Tilton | 70 | Wife | — | New Jersey |
| 61 | Alwood Tilton | 46 | Head | Foreman | New Jersey |
| 62 | Elsie Tilton | 43 | Wife | — | New Jersey |
| 63 | James T. Dodge | 28 | Head | Doctor | New York |
| 64 | Dorothy Dodge | 25 | Wife | — | New York |
| 65 | Dorothy V. Dodge | 5 | Daughter | — | New York |
| 66 | Edward Rockafellow | 44 | Housekeeper | Housekeeper | New Jersey |
| 67 | Maria Rockafellow | 42 | Wife | Housekeeper | Pennsylvania |
| 68 | Cecil Barker | 29 | Head | Optician | England |
| 69 | Emma Barker | 26 | Wife | — | New Jersey |
| 70 | James Acquaviva | 26 | Head | Civil Engineer | New Jersey |
| 71 | Lillian Acquaviva | 31 | Wife | — | New Jersey |
| 72 | Geraldine Acquaviva | 4 | Daughter | — | New Jersey |
| 73 | Mary Nagy | 63 | Mother in law | — | Hungary |
| 74 | Margaret Nagy | 30 | Sister in law | Stenographer | New Jersey |
| 75 | Hannah Warren | 72 | Head | — | England |
| 76 | William Warren THIS PERSON | 32 | Son | Electrician | New Jersey |
| 77 | Mary E. Warren | 38 | Daughter | — | New Jersey |
| 78 | Ethel Warren | 37 | Daughter | — | New Jersey |
| 79 | Rose Dunn | 43 | Head | Janitor | New Jersey |
| 80 | Helen Dunn | 24 | Daughter | Senior Clerk | New Jersey |
Pedigree Summary
William + 2 siblings
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)