RB
Robert Ball — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this Robert Ball across the 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed) — first a head (b.~1888), then head of a 6-person household.
Age 52
b. ~1888
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | Ball |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Princeton Borough |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same House |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Princeton Borough |
| Est. Birth Year | ~1888 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Levi Francis | Other | — | 43 | ~1897 |
| Alexander Hoagland | Other | — | 24 | ~1916 |
| Marie Ball | Spouse | — | 48 | ~1892 |
| Theodosia Francis | Other | — | 34 | ~1906 |
| Robert Ball | Head | — | 52 | ~1888 |
| Helen Hoagland | Daughter | — | 20 | ~1920 |
Census Appearances
1920
Mercer, New …
Head, age 32
Mercer, New Jersey · implied b. ~1888 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Ball |
| Given Name | Robert H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Maryland |
| Occupation | Porter |
| Industry | Club house |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Mercer, New …
Head, age 42
Mercer, New Jersey · implied b. ~1888 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Ball |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 20 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Truck driver |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 3,500 |
| Radio Set | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Mercer-County, New …
Head, age 52
Mercer-County, New Jersey · implied b. ~1888 — 6 household members
| Surname | Ball |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Princeton Borough |
| 1935 Residence (County) | Mercer |
| Hours Worked | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same House |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Ball across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Robert Ball
Head · 1940 · age 52 · b. ~1888 · New Jersey
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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-t0627-02357-00606)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Wilmina Johnson | 53 | Wife | Housekeeper | Virginia |
| 2 | William Foster | 66 | Lodger | — | Virginia |
| 3 | Clayton Rhodes | 38 | Head | Janitor | North Carolina |
| 4 | Pauline Rhodes | 40 | Wife | — | North Carolina |
| 5 | Emanuel Rhodes | 19 | Son | Janitor Asst | North Carolina |
| 6 | Oscar Rhodes | 18 | Son | Asst Janitor | North Carolina |
| 7 | Elijah Imes | 26 | Nephew | Scullion | North Carolina |
| 8 | Edith B. Staten | 24 | Niece | — | North Carolina |
| 9 | Thomas Harris | 44 | Head | First Cook | Alabama |
| 10 | Mattie Harris | 44 | Wife | Cook | North Carolina |
| 11 | Carrie Redding | 10 | Lodger | — | New Jersey |
| 12 | William Fuller | 15 | Lodger | — | New Jersey |
| 13 | William H. Fuller | 7 | Lodger | — | New Jersey |
| 14 | Belle Yancy | 56 | Head | Cook | Virginia |
| 15 | Edward Oliver | 32 | Son | Waiter | New Jersey |
| 16 | Ray Oliver | 27 | Daughter | Pantry Maid | New Jersey |
| 17 | Florence Smith | 24 | Lodger | Cook | Virginia |
| 18 | Andrew Melchor | 60 | Head | Laborer | North Carolina |
| 19 | Ethel Melchor | 40 | Wife | Laundress | North Carolina |
| 20 | Sarah White | 18 | Step-daughter | — | North Carolina |
| 21 | Seraphine White | 17 | Step-daughter | — | New Jersey |
| 22 | Sillie Melchor | 14 | Daughter | — | New York |
| 23 | Celia Melchor | 12 | Daughter | — | New Jersey |
| 24 | John Melchor | 10 | Son | — | New Jersey |
| 25 | Barbara J. Melchor | 6 | Daughter | — | New Jersey |
| 26 | Ethel Melchor | 4 | Daughter | — | New Jersey |
| 27 | Robert Ball THIS PERSON | 52 | Head | — | Maryland |
| 28 | Marie Ball | 48 | Wife | Candy Store Clerk | Virginia |
| 29 | Alexander Hoagland | 24 | Son-in-law | Grocery Store Clerk | New Jersey |
| 30 | Helen R. Hoagland | 20 | Daughter | — | New Jersey |
| 31 | Levi Francis | 43 | Lodger | Bartender | Maryland |
| 32 | Theodosia Francis | 34 | Lodger | Housekeeper | Maryland |
| 33 | James M. English | 51 | Head | Butler | West Virginia |
| 34 | Mary A. English | 46 | Wife | — | Virginia |
| 35 | Fanny Burgess | 71 | Mother-in-law | — | Virginia |
| 36 | Marshall Williams | 55 | Head | Cook | Virginia |
| 37 | Lucy Williams | 42 | Wife | Dressmaker | New Jersey |
| 38 | Lucy Downs | 72 | Mother-in-law | — | New Jersey |
| 39 | Alberta Young | 32 | Sister | — | New Jersey |
| 40 | William W. Nixon | 81 | Head | — | New Jersey |
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)