WS
William Shea — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this William Shea across the 1910, 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed), with identified parents Stephen & Margaret — first a son (b.~1900), then head of a 3-person household.
Age 40
b. ~1900
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | Shea |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Trenton City |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Occupation | Laborer |
| Industry | Repair Dept City |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1025 |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Laborer |
| Township / Ward | Trenton City |
| Est. Birth Year | ~1900 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Anna Shea | Daughter | — | 33 | ~1907 |
| Margaret Shea | Head | — | 75 | ~1865 |
| William Shea | Son | — | 40 | ~1900 |
Census Appearances
1910
Mercer, New …
Son, age 10
Mercer, New Jersey · implied b. ~1900 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shea |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Pennsylvania |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1920
Mercer, New …
Son, age 19
Mercer, New Jersey · implied b. ~1901 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shea |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Pennsylvania |
| Occupation | Laborer |
| Industry | Motor Co |
| Class of Worker | W |
| Can Read | No |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Mercer, New …
Son, age 29
Mercer, New Jersey · implied b. ~1901 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shea |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Pennsylvania |
| Occupation | mechanic |
| Industry | Automobile |
| 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 40
Mercer-County, New Jersey · implied b. ~1900 — 3 household members
| Surname | Shea |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Trenton City |
| 1935 Residence (County) | Mercer |
| Occupation | Laborer |
| Industry | Repair Dept City |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1025 |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| 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 Shea across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Stephen Shea (~0.92 confidence) and mother Margaret Shea (~0.92 confidence) and father Stephen Shea (~0.92 confidence) and mother Margaret Shea (~0.92 confidence) and mother Margaret Shea (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Stephen Shea
b. ~1863
Source father
● Household
· direct · ~0.92
Mother
Margaret Shea
b. ~1865
Source mother
● Household
· direct · ~0.92
Father
Stephen Shea
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Margaret Shea
b. ~1869
Source mother
● Household
· direct · ~0.92
Mother
Margaret Shea
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Shea
Son · 1940 · age 40 · b. ~1900 · New Jersey
★ You are viewing this record
Sibling
Anna Shea
Sibling · 1940 · age 33
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-t0627-02356-00626)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William E Cummins | 70 | Head | Machinist | Pennsylvania |
| 42 | Julia A Cummins | 66 | Wife | — | New Jersey |
| 43 | Sarah Roessler | 55 | In Law | Assembler | New Jersey |
| 44 | Mary E Higgins | 76 | Sister | — | Pennsylvania |
| 45 | Margaret Shea | 75 | Head | — | Pennsylvania |
| 46 | William Shea THIS PERSON | 40 | Son | Laborer | New Jersey |
| 47 | Anna Shea | 33 | Daughter | Stenographer | New Jersey |
| 48 | Lawton Wolf | 26 | Head | Clerk | New Jersey |
| 49 | Margaret Wolf | 25 | Wife | Finisher | Maryland |
| 50 | Charles Kenny | 26 | Head | Clerk | New Jersey |
| 51 | Evelyn Kenny | 26 | Wife | — | New Jersey |
| 52 | William Kenny | 2 | Son | — | New Jersey |
| 53 | Margaret Hagan | 53 | Head | — | New York |
| 54 | William Hagan | 23 | Brother | — | New York |
| 55 | J. Harrolo Jefferson | 24 | Head | Clerk | New Jersey |
| 56 | Dorothy Jefferson | 23 | Wife | — | New Jersey |
| 57 | John C. Stiefbold | 56 | Head | Pattern And Foundry Dept | New Jersey |
| 58 | Theresa Stiefbold | 48 | Wife | — | New York |
| 59 | James J. Bailey | 53 | Head | Machinist | Pennsylvania |
| 60 | Madge Bailey | 52 | Wife | — | Pennsylvania |
| 61 | John H Karl | 47 | Head | Packer | Yugoslavia |
| 62 | Marianna Karl | 49 | Wife | — | Yugoslavia |
| 63 | Morris Hirschfield | 52 | Head | Tailor | Russia |
| 64 | Yette Hirschfield | 55 | Wife | — | Russia |
| 65 | Betty Hirschfield | 32 | Daughter | Bookkeeper | New Jersey |
| 66 | Joseph Hirschfield | 23 | Son | Grocery Clerk | New Jersey |
| 67 | Samuel Hirschfield | 21 | Son | Clerk | New Jersey |
| 68 | Lewis Hirschfield | 19 | Son | Messenger | New Jersey |
| 69 | Rebecca Slaver | 65 | Head | — | New Jersey |
| 70 | Sadie Barlow | 44 | Daughter | — | New Jersey |
| 71 | E. Lawrence Barlow | 24 | Son | Hairdresser | New Jersey |
| 72 | Lucy Taylor | 42 | Head | Saleslady | New Jersey |
| 73 | Norma Taylor | 21 | Daughter | Nursing | New Jersey |
| 74 | Erma Taylor | 18 | Daughter | Stenographer | Pennsylvania |
| 75 | Esther Taylor | 15 | Daughter | — | New Jersey |
| 76 | John Quigley | 49 | Head | Painter | Pennsylvania |
| 77 | Rose Quigley | 48 | Wife | Bookkeeper | New Jersey |
| 78 | Rose Quigley | 22 | Daughter | Stenographer | New Jersey |
| 79 | Gallus Quigley | 16 | Son | — | Panama |
| 80 | John J. Quigley | 4 | Son | — | New Jersey |
Pedigree Summary
William + 1 sibling
Gen 1 · 5 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)