MP
Mary Pierce — 1940 US Census Record
Model Tree available1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this Mary Pierce across the 1920, 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Edward & Edward — first a daughter (b.~1893), then head of a 3-person household.
Age 47
b. ~1893
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Pierce |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Beverly City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Occupation | Reg. Nurse |
| Industry | Priv. Pract. |
| Class of Worker | OA |
| Hours Worked | 4 |
| Income (1939) | 924 |
| Highest Grade | H-8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Reg. Nurse |
| Township / Ward | Beverly City |
| Est. Birth Year | ~1893 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Helen Pierce | Daughter | — | 39 | ~1901 |
| Mary Pierce | Daughter | — | 47 | ~1893 |
| Edward Pierce | Head | — | 77 | ~1863 |
Census Appearances
1920
Essex, Massachusetts
Daughter, age 26
Essex, Massachusetts · implied b. ~1894 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierce |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Pennsylvania |
| Occupation | Nurse |
| Industry | Hospital |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Essex, Massachusetts
Daughter, age 36
Essex, Massachusetts · implied b. ~1894 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierce |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | England |
| Occupation | Registered Nurse |
| Industry | General Practice |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Daughter, age 47
Essex-County, Massachusetts · implied b. ~1893 — 3 household members
| Surname | Pierce |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Beverly City |
| 1935 Residence (County) | Essex |
| Occupation | Reg. Nurse |
| Industry | Priv. Pract. |
| Class of Worker | OA |
| Hours Worked | 4 |
| Income (1939) | 924 |
| Highest Grade | H-8 |
| 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 Mary Pierce across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Edward Pierce (~0.92 confidence) and father Edward Pierce (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Edward Pierce
b. ~1863
Source father
● Household
· direct · ~0.92
Father
Edward Pierce
b. ~1870
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Pierce
Daughter · 1940 · age 47 · b. ~1893 · Massachusetts
★ You are viewing this record
Sibling
Helen Pierce
Sibling · 1940 · age 39
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 — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01578-00512)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jeannet P Cole | 60 | Head | — | Massachusetts |
| 42 | Elsie E Cole | 34 | Daughter | Bookkeeper | Massachusetts |
| 43 | John Cole | 26 | Son | Pressman | Massachusetts |
| 44 | Edward P White | 27 | Head | Gas Stat. Clerk | Massachusetts |
| 45 | Olive L White | 23 | Wife | — | Massachusetts |
| 46 | Edward G White | 0 | Son | — | Massachusetts |
| 47 | Edward W Pierce | 77 | Head | — | Massachusetts |
| 48 | Mary L Pierce THIS PERSON | 47 | Daughter | Reg. Nurse | Massachusetts |
| 49 | Helen W Pierce | 39 | Daughter | Cashier | Massachusetts |
| 50 | Emma A Willette | 70 | Head | — | Massachusetts |
| 51 | Frank E Wildes | 52 | Son | Clerk | Massachusetts |
| 52 | John A Trowt | 52 | Head | Garageowner | Massachusetts |
| 53 | Belinda S Trowt | 53 | Wife | — | Massachusetts |
| 54 | Frances E Trowt | 22 | Daughter | — | Massachusetts |
| 55 | Sylvia Trowt | 20 | Daughter | Sect. Office | Massachusetts |
| 56 | Mary E Trowt | 18 | Daughter | — | Massachusetts |
| 57 | Vincent Vardella | 47 | Head | Gardener | Italy |
| 58 | Pierina B Vardella | 31 | Wife | — | Italy |
| 59 | Anita Vardella | 5 | Daughter | — | Massachusetts |
| 60 | Geraldine Vardella | 4 | Daughter | — | Massachusetts |
| 61 | Janet Vardella | 2 | Daughter | — | Massachusetts |
| 62 | Tina Vardella | 0 | Daughter | — | Massachusetts |
| 63 | Margaret L Barr | 54 | Head | — | Pennsylvania |
| 64 | Mary B Barr | 88 | Mother | — | Pennsylvania |
| 65 | Madeline Barr | 45 | Sister | — | Pennsylvania |
| 66 | Samuel J Cinnamond | 58 | Head | Chauffeur | Scotland |
| 67 | Elizabeth J Cinnamond | 58 | Wife | — | Canada English |
| 68 | Elizabeth J Cinnamond | 23 | Daughter | Sect. | Massachusetts |
| 69 | Edmund J Chisholm | 58 | Head | Gardener | Canada English |
| 70 | Lena V Chisholm | 54 | Wife | — | Canada English |
| 71 | Marion Chisholm | 24 | Daughter | — | Massachusetts |
| 72 | Josephine A Chisholm | 20 | Daughter | Sect. | Massachusetts |
| 73 | Theresa F Chisholm | 13 | Daughter | — | Massachusetts |
| 74 | Edmund J Chisholm | 10 | Son | — | Massachusetts |
| 75 | Samuel Vaughan | 53 | Head | Lawyer | Massachusetts |
| 76 | Louise B Vaughan | 26 | Daughter | Architect | Massachusetts |
| 77 | Samuel Vaughan | 24 | Son | Agent | Massachusetts |
| 78 | William Vaughan | 22 | Son | — | Massachusetts |
| 79 | Ellen Vaughan | 17 | Daughter | — | Massachusetts |
| 80 | Julia Walsh | 55 | Servant | Maid | Eire |
Pedigree Summary
Mary + 1 sibling
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)