RH
Robert Hayes — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this Robert Hayes across the 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed), with identified parents Robert & Florence — first a son (b.~1918), then head of a 5-person household.
Age 22
b. ~1918
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | Hayes |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Hamilton Twp |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Hours Worked | 84 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Hamilton Twp |
| Est. Birth Year | ~1918 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Lorain Hayes | Daughter | — | 13 | ~1927 |
| Kathleen Hayes | Daughter | — | 10 | ~1930 |
| Robert Hayes | Head | — | 46 | ~1894 |
| Robert Hayes | Son | — | 22 | ~1918 |
| Florence Hayes | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Mercer, New …
Other, age 1
Mercer, New Jersey · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hayes |
| Given Name | Robert J |
| Relationship to Head | Grandson |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Mercer, New …
Son, age 11
Mercer, New Jersey · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hayes |
| Given Name | Robert |
| 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 | New Jersey |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Mercer-County, New …
Son, age 22
Mercer-County, New Jersey · implied b. ~1918 — 5 household members
| Surname | Hayes |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Hamilton Twp |
| 1935 Residence (County) | Mercer |
| Hours Worked | 84 |
| Highest Grade | H 4 |
| 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 Robert Hayes across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Hayes (~0.92 confidence) and mother Florence Hayes (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Hayes
b. ~1894
Source father
● Household
· direct · ~0.92
Mother
Florence Hayes
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Hayes
Son · 1940 · age 22 · b. ~1918 · New Jersey
★ You are viewing this record
Sibling
Kathleen Hayes
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lorain Hayes
Sibling · 1940 · age 13
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-t0627-02356-01042)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Alice Fwick | 37 | Wife | — | New Jersey |
| 42 | Elizabeth Fwick | 15 | Daughter | — | New Jersey |
| 43 | J. William Fwick | 8 | Son | — | New Jersey |
| 44 | Fred R. Lindley | 33 | Head | Electrician | New Jersey |
| 45 | Mary M. Lindley | 34 | Wife | Deputy Clerk | Penna |
| 46 | William Markhoff | 41 | Head | Printer | Russia |
| 47 | Louise Markhoff | 37 | Wife | — | Penna |
| 48 | Marie Markhoff | 11 | Daughter | — | Penna |
| 49 | William Markhoff | 9 | Son | — | New Jersey |
| 50 | Lambert Kubisz | 66 | Head | — | Poland |
| 51 | Mary Kubisz | 58 | Wife | — | Penna |
| 52 | Marion Kubisz | 38 | Son | Clerk Ledger | New Jersey |
| 53 | Clara Kubisz | 29 | Daughter-in-law | — | New Jersey |
| 54 | George The Constantine | 60 | Head | — | New York |
| 55 | Eunice The Constantine | 54 | Wife | — | Mass |
| 56 | Robert Hayes | 46 | Head | Maintenance | New Jersey |
| 57 | Florence Hayes | 45 | Wife | Packer | New Jersey |
| 58 | Robert Hayes THIS PERSON | 22 | Son | — | New Jersey |
| 59 | Lorain Hayes | 13 | Daughter | — | New Jersey |
| 60 | Kathleen Hayes | 10 | Daughter | — | New Jersey |
| 61 | Frank Brady | 39 | Head | L. Engineer | New Jersey |
| 62 | Margerie Brady | 37 | Wife | Sales | New Jersey |
| 63 | Kenneth Brady | 10 | Son | — | New Jersey |
| 64 | Beverly Brady | 5 | Daughter | — | New Jersey |
| 65 | Earl Wagner | 41 | Head | Air Conditioning | New Jersey |
| 66 | Alice Wagner | 40 | Wife | — | New Jersey |
| 67 | Mary Ann Wagner | 10 | Daughter | — | New Jersey |
| 68 | Caryn Wagner | 8 | Daughter | — | New Jersey |
| 69 | Albert Hertz | 43 | Head | Dairy | New Jersey |
| 70 | Mabel Hertz | 43 | Wife | — | New Jersey |
| 71 | Thelma Hertz | 18 | Daughter | — | New Jersey |
| 72 | Charles R. Upton | 50 | Head | Accountant | California |
| 73 | Ruth V. Upton | 48 | Wife | Clerk | New Jersey |
| 74 | John Fletcher | 58 | Head | Foreman | England |
| 75 | Ada Fletcher | 58 | Wife | — | England |
| 76 | Bella Wilkinson | 60 | Head | Cleaning | New Jersey |
| 77 | James Wilkinson | 15 | Son | — | New Jersey |
| 78 | Henry Hertz | 60 | Head | Plate Worker | Germany |
| 79 | Alice Hertz | 59 | Wife | — | England |
| 80 | Paul Hertz | 35 | Son | Butler | New Jersey |
Pedigree Summary
Robert + 2 siblings
Gen 1 · 2 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)