JP
John Pierson — 1940 US Census Record
Model Tree available1940 United States Federal Census · New-Castle-County, Delaware
Our Model Tree links this John Pierson across the 1920, 1930 and 1940 US Censuses in New-Castle-County, Delaware (XGBoost, ~Confirmed), with identified parents Frank & Ida — first a head (b.~1900), then head of a 3-person household.
Age 40
b. ~1900
Male
Head
Born: Delaware
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | New-Castle-County, Delaware |
| Surname | Pierson |
| Given Name | John C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Delaware |
| 1935 Residence (City) | Representative District 6 |
| 1935 Residence (County) | New Castle |
| Additional Details | |
| Occupation | Surgeon |
| Class of Worker | OA |
| Income (1939) | 5000 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
| Occupation | Surgeon |
| Township / Ward | Representative District 6 |
| 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 John | Age | Birth yr |
|---|---|---|---|---|
| John Pierson | Head | — | 40 | ~1900 |
| Doris Pierson | Spouse | — | 31 | ~1909 |
| Joyce Pierson | Daughter | — | 5 | ~1935 |
Census Appearances
1920
New Castle, …
Son, age 20
New Castle, Delaware · implied b. ~1900 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierson |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Delaware |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1930
New Castle, …
Head, age 30
New Castle, Delaware · implied b. ~1900 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pearson |
| Given Name | John L |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Delaware |
| Age at First Marriage | 25 |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Occupation | Doctor |
| Industry | General Practice |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | $7,000 |
| Radio Set | R |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1940
New-Castle-County, Delaware
Head, age 40
New-Castle-County, Delaware · implied b. ~1900 — 3 household members
| Surname | Pierson |
| Given Name | John C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Delaware |
| 1935 Residence (City) | Representative District 6 |
| 1935 Residence (County) | New Castle |
| Occupation | Surgeon |
| Class of Worker | OA |
| Income (1939) | 5000 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
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 John Pierson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Pierson (~0.92 confidence) and mother Ida Pierson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Pierson
b. ~1863
Source father
● Household
· direct · ~0.92
Mother
Ida Pierson
b. ~1871
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Pierson
Head · 1940 · age 40 · b. ~1900 · Delaware
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — New-Castle-County, Delaware
Open full size
1940 US Federal Census — New-Castle-County, Delaware
Page Contents
32 people indexed on this census page (nara:1940:m-t0627-00545-00341)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Raymond Jr Lynch | 10 | Son | — | Delaware |
| 2 | Richard Lynch | 6 | Son | — | Delaware |
| 3 | Arthur H Hill | 39 | Head | Credit Manager | New York |
| 4 | Winifred S Hill | 37 | Wife | — | New York |
| 5 | Hill | None | — | — | — |
| 6 | Hill | None | — | — | — |
| 7 | Hill | None | — | — | — |
| 8 | William H Keller | 46 | Head | Legal Dept | Maryland |
| 9 | Jeannette Keller | 35 | Wife | — | Ohio |
| 10 | Moreland Keller | 10 | Daughter | — | Delaware |
| 11 | Wayne Keller | 8 | Son | — | Delaware |
| 12 | Helmot James | 37 | Head | School Teacher | Conn |
| 13 | Barbar James | 34 | Wife | — | New York |
| 14 | Mary Lee James | 5 | Daughter | — | New York |
| 15 | H Rufus James | 5 | Son | — | New York |
| 16 | Jeannette Goodly | 19 | Maid | Maid | Delaware |
| 17 | John C Pierson THIS PERSON | 40 | Head | Surgeon | Delaware |
| 18 | Doris S Pierson | 31 | Wife | — | Iowa |
| 19 | Joyce A Pierson | 5 | Daughter | — | Delaware |
| 20 | John H Mccauley | 31 | Head | Accountant | Maryland |
| 21 | Helen R Mccauley | 31 | Wife | Secretary | Maryland |
| 22 | Mccauley | None | — | — | — |
| 23 | Mccauley | None | — | — | — |
| 24 | Mccauley | None | — | — | — |
| 25 | Lewis L Becker | 37 | Head | — | New York |
| 26 | Ethel N Becker | 37 | Wife | — | Delaware |
| 27 | Phylis Becker | 10 | Daughter | — | Delaware |
| 28 | E H Highsmith | 33 | Head | Attorney | Georgia |
| 29 | Teresa Highsmith | 37 | Wife | — | Kentucky |
| 30 | Layman Highsmith | 7 | Daughter | — | Georgia |
| 31 | Frances Highsmith | 3 | Daughter | — | Georgia |
| 32 | Irene Scott | 22 | Maid | Maid | Georgia |
Pedigree Summary
John
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)