JP
John Pierce — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Pierce across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Sarah & Hazel — first a son (b.~1918), then head of a 6-person household.
Age 22
b. ~1918
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Pierce |
| Given Name | John A. D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden city |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | C 2 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Malden City |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Jane Pierce | Daughter | — | 15 | ~1925 |
| Hazel Pierce | Head | — | 52 | ~1888 |
| Helen Hadley | Other | — | 70 | ~1870 |
| Andrew Pierce | Son | — | 20 | ~1920 |
| Robert Pierce | Son | — | 18 | ~1922 |
| John Pierce | Son | — | 22 | ~1918 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 2
Middlesex, Massachusetts · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierce |
| Given Name | John H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 12
Middlesex, Massachusetts · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierce |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 22
Middlesex-County, Massachusetts · implied b. ~1918 — 6 household members
| Surname | Pierce |
| Given Name | John A. D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden city |
| 1935 Residence (County) | Middlesex |
| Highest Grade | C 2 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Pierce across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Sarah Pierce (~0.92 confidence) and mother Hazel Pierce (~0.92 confidence) and father Andrew Pierce (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Sarah Pierce
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Hazel Pierce
b. ~1888
Source mother
● Household
· direct · ~0.92
Father
Andrew Pierce
b. ~1889
Source father
● Household
· direct · ~0.92
This person
Anchor record
John Pierce
Son · 1940 · age 22 · b. ~1918 · Massachusetts
★ You are viewing this record
Sibling
Jane Pierce
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Pierce
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Andrew Pierce
Sibling · 1940 · age 20
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01608-00472)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Kenneth W. Bissett | 42 | Son | Salesman | Massachusetts |
| 42 | Sanford Kay | 53 | Head | Proprietor | Canada English |
| 43 | Winnifred Kay | 56 | Wife | — | Canada English |
| 44 | Dorothy F. Kay | 22 | Daughter | School Teacher | New Hampshire |
| 45 | Virginia Kay | 20 | Daughter | — | Massachusetts |
| 46 | Annie E. Jones | 85 | Head | — | Pennsylvania |
| 47 | Wesley H. Ertz | 49 | Head | Treasurer | Canada English |
| 48 | Lorena B. Ertz | 47 | Wife | — | Canada English |
| 49 | Virginia Ertz | 12 | Daughter | — | Massachusetts |
| 50 | David Wisotzki | 67 | Head | Proprietor | Poland |
| 51 | Margaret X. Wisotzki | 65 | Wife | — | Canada English |
| 52 | Flora B. Wisotzki | 37 | Daughter | Stenographer | Massachusetts |
| 53 | Muriel Wisotzki | 27 | Daughter | Clerk | Massachusetts |
| 54 | William Crawford | 34 | Son-in-law | Upholsterer | Massachusetts |
| 55 | Beatrice Crawford | 22 | Daughter | — | Massachusetts |
| 56 | Alice X. Bascom | 79 | Head | — | Massachusetts |
| 57 | Walter H. Carpenter | 66 | Son-in-law | Proprietor | New York |
| 58 | Marion Carpenter | 50 | Daughter | Partner | Massachusetts |
| 59 | Edward Ab Carpenter | 3 | Grandson | — | New York |
| 60 | Walter Ab Carpenter | 20 | Grandson | — | New York |
| 61 | Josephine Serron | 34 | Maid | Maid | Canada English |
| 62 | Hazel H. Pierce | 52 | Head | — | Massachusetts |
| 63 | John A. D. Pierce THIS PERSON | 22 | Son | — | Massachusetts |
| 64 | Andrew Pierce | 20 | Son | — | Massachusetts |
| 65 | Robert Pierce | 18 | Son | — | Massachusetts |
| 66 | Jane Pierce | 15 | Daughter | — | Massachusetts |
| 67 | Helen Hadley | 70 | Sister | — | Massachusetts |
| 68 | Clarence M. Stables | 59 | Head | — | Massachusetts |
| 69 | Lillian Dexter | 54 | Sister | Nurse | Maine |
| 70 | Peter R. Vander Sloot | 26 | Lodger | Draftsman | Rhode Island |
| 71 | Georgia R. Vander Sloot | 24 | Lodger | Nurse | New Jersey |
| 72 | Marion Flagg | 45 | Lodger | School Teacher | Massachusetts |
| 73 | George Dr. Parker | 27 | Lodger | Dentist | Washington |
| 74 | Harry J. Walton | 54 | Head | Assistant Manager | Massachusetts |
| 75 | Marguerite Walton | 54 | Wife | — | New Hampshire |
| 76 | Arline J. Walton | 28 | Daughter | School Teacher | Massachusetts |
| 77 | Joan L. Walton | 17 | Daughter | — | Massachusetts |
| 78 | Dorothy X. Hallin | 41 | Head | — | England |
| 79 | Edward Hallin | 40 | Husband | Pressman | Massachusetts |
| 80 | Francis J. Smith | 78 | Head | — | Massachusetts |
Pedigree Summary
John + 3 siblings
Gen 1 · 3 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)