RM
Robert Mccarthy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this Robert Mccarthy across the 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed), with identified parents Florence & Florence — first a son (b.~1919), then head of a 5-person household.
Age 21
b. ~1919
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | McCarthy |
| Given Name | Robert D |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Princeton Borough |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Industry | 700 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Princeton Borough |
| Est. Birth Year | ~1919 |
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 |
|---|---|---|---|---|
| Ruth Mccarthy | Daughter | — | 15 | ~1925 |
| Regina Mccarthy | Spouse | — | 48 | ~1892 |
| Eleanor Mccarthy | Daughter | — | 22 | ~1918 |
| Florence Mccarthy | Head | — | 48 | ~1892 |
| Robert Mccarthy | Son | — | 21 | ~1919 |
Census Appearances
1920
Mercer, New …
Son, age 1
Mercer, New Jersey · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | Robert J. |
| Relationship to Head | Son |
| 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 | McCarthy |
| 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 |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Mercer-County, New …
Son, age 21
Mercer-County, New Jersey · implied b. ~1919 — 5 household members
| Surname | McCarthy |
| Given Name | Robert D |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Princeton Borough |
| 1935 Residence (County) | Mercer |
| Industry | 700 |
| 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 Robert Mccarthy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Florence Mccarthy (~0.92 confidence) and father Florence Mccarthy (~0.92 confidence) and mother Regina Mccarthy (~0.92 confidence) and mother Regina Mccarthy (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Florence Mccarthy
b. ~1892
Source father
● Household
· direct · ~0.92
Father
Florence Mccarthy
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Regina Mccarthy
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Regina Mccarthy
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Mccarthy
Son · 1940 · age 21 · b. ~1919 · New Jersey
★ You are viewing this record
Sibling
Eleanor Mccarthy
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Mccarthy
Sibling · 1940 · age 15
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
21 people indexed on this census page (nara:1940:m-t0627-02357-00587)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Franklin Willey | 29 | Lodger | Pantry Man | New Jersey |
| 42 | Eugene Vasiliappa | 35 | Lodger | Pantry Man | Greece |
| 43 | John Conover | 27 | Lodger | Pantry Man | New Jersey |
| 44 | Russell Conover | 25 | Lodger | Pantry Man | New Jersey |
| 45 | Paul Kocsis | 30 | Lodger | Porter | Poland |
| 46 | George Cox | 27 | Lodger | Cleaner | New Jersey |
| 47 | Anton Borsa | 61 | Lodger | Cleaner | Italy |
| 48 | Frank Birch | 37 | Head | Teacher | New Jersey |
| 49 | Eunice Birch | 32 | Wife | — | New Jersey |
| 50 | George Birch | 8 | Son | — | New Jersey |
| 51 | Frank Jr Birch | 2 | Son | — | New Jersey |
| 52 | Hans Waldemar Jaeger | 41 | Lodger | Gymn. Professor | Poland |
| 53 | Norman W. Mccuen | 22 | Lodger | Research Worker | Iowa |
| 54 | Florence J. Mccarthy | 48 | Head | Proprietor | New Jersey |
| 55 | Regina Mccarthy | 48 | Wife | — | New Jersey |
| 56 | Eleanor A Mccarthy | 22 | Daughter | Stenographer | New Jersey |
| 57 | Robert D Mccarthy THIS PERSON | 21 | Son | — | New Jersey |
| 58 | Ruth M Mccarthy | 15 | Daughter | — | New Jersey |
| 59 | Herbert E Warren | 53 | Head | — | Vermont |
| 60 | Genevieve Warren | 52 | Wife | — | Connecticut |
| 61 | Chas. H. Jr Van Sciver | 27 | Son | Manager | Pennsylvania |
Pedigree Summary
Robert + 2 siblings
Gen 1 · 4 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)