MP
Mary Pierce — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this Mary Pierce across the 1920, 1930 and 1940 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1896), then head of a 4-person household.
Age 34
b. ~1896
Female
Spouse
Born: Delaware
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Philadelphia, Pennsylvania |
| Surname | Pierce |
| Given Name | Mary B |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Delaware |
| Age at First Marriage | 23 |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
| Township / Ward | Philadelphia City |
| Est. Birth Year | ~1896 |
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.
4 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Jessie Pierce | Daughter | — | 3 | ~1927 |
| Betty Pierce | Daughter | — | 11 | ~1919 |
| George Pierce | Head | — | 41 | ~1889 |
| Mary Pierce | Spouse | — | 34 | ~1896 |
Census Appearances
1920
Delaware, Pennsylvania
Spouse, age 24
Delaware, Pennsylvania · implied b. ~1896 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierce |
| Given Name | May |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Delaware |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1930
Philadelphia, Pennsylvania
Spouse, age 34
Philadelphia, Pennsylvania · implied b. ~1896 — 4 household members
| Surname | Pierce |
| Given Name | Mary B |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Delaware |
| Age at First Marriage | 23 |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Can Read/Write | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1940
Delaware-County, Pennsylvania
Spouse, age 44
Delaware-County, Pennsylvania · implied b. ~1896 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierce |
| Given Name | May |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Delaware |
| 1935 Residence (City) | Middletown Twp. |
| 1935 Residence (County) | Delaware |
| Occupation | Drawer In |
| Industry | Textile Mill |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 900 |
| Highest Grade | No 8 |
| 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 Mary Pierce across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Pierce
Spouse · 1930 · age 34 · b. ~1896 · Pennsylvania
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Philadelphia, Pennsylvania
Open full size
1930 US Federal Census — Philadelphia, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel2140:0050)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert E Amaley | 70 | Head | — | Pennsylvania |
| 2 | Mary Jane Amaley | 70 | Wife | — | Northern Ireland |
| 3 | Charles B Perrine | 45 | Head | Broadcaster | Pennsylvania |
| 4 | Grace Perrine | 55 | Wife | — | Pennsylvania |
| 5 | Caroline Santon | 67 | Roomer | — | Indiana |
| 6 | George C Pierce | 41 | Head | Pilot | Maryland |
| 7 | Mary B Pierce THIS PERSON | 34 | Wife | — | Delaware |
| 8 | Betty Pierce | 11 | Daughter | — | Delaware |
| 9 | Jessie L Pierce | 3 | Daughter | — | Pennsylvania |
| 10 | Charles H Sterner | 63 | Head | Policeman | New York |
| 11 | Laura B Sterner | 58 | Wife | — | Pennsylvania |
| 12 | Anne E Conley | 62 | Head | Bookkeeper | Pennsylvania |
| 13 | Joseph W East | 50 | Head | Distributor Clerk | Maryland |
| 14 | Isabelle East | 40 | Wife | — | Scotland |
| 15 | Robert J East | 9 | Son | — | Maryland |
| 16 | Isabelle East | 7 | Daughter | — | Maryland |
| 17 | William Donnelly | 51 | Head | Printer | Pennsylvania |
| 18 | Margaret Donnelly | 48 | Wife | — | Pennsylvania |
| 19 | Henry Maier | 44 | Head | Oiler | Germany |
| 20 | Violet Maier | 35 | Wife | — | Utah |
| 21 | Florence Maier | 12 | Daughter | — | Pennsylvania |
| 22 | Violet Maier | 8 | Daughter | — | Pennsylvania |
| 23 | William J Dunlap | 56 | Head | Circulation Manager | Pennsylvania |
| 24 | Eva M Dunlap | 56 | Wife | — | Pennsylvania |
| 25 | Virginia S Dunlap | 27 | Daughter | Stenographer | Pennsylvania |
| 26 | Evelyn B Dunlap | 23 | Daughter | Bookkeeper | Pennsylvania |
| 27 | Doris Dunlap | 19 | Daughter | Bank Clerk | Pennsylvania |
| 28 | Edward Kelley | 46 | Head | Druggist | Pennsylvania |
| 29 | May Kelley | 46 | Wife | — | New Jersey |
| 30 | James J Henry | 39 | Head | Machinist | Pennsylvania |
| 31 | Irene Henry | 38 | Wife | — | Pennsylvania |
| 32 | Frances Henry | 19 | Daughter | Candy Packer | Pennsylvania |
| 33 | Marie Henry | 12 | Daughter | — | Pennsylvania |
| 34 | Anna May Henry | 10 | Daughter | — | Pennsylvania |
| 35 | James Jr Henry | 2 | Son | — | New Jersey |
| 36 | Mary Robinson | 65 | Mother | — | Northern Ireland |
| 37 | Howard E Morris | 57 | Head | Highway Dept | Pennsylvania |
| 38 | Elizabeth Morris | 50 | Wife | — | Illinois |
| 39 | Alice Morris | 60 | Sister | Telephone Dept | Pennsylvania |
| 40 | John Knert | 68 | Head | — | Pennsylvania |
| 41 | William Knert | 30 | Son | Stock Clerk | Pennsylvania |
| 42 | Henrietta Knert | 28 | Daughter | — | Pennsylvania |
| 43 | Cecelia Knert | 26 | Daughter | Bookkeeper | Pennsylvania |
| 44 | Elizabeth Collins | 50 | Head | Linotyper | Kansas |
| 45 | Frances E Collins | 21 | Daughter | Teacher | Pennsylvania |
| 46 | Joseph Collins | 14 | Son | Helper | Pennsylvania |
| 47 | Elizabeth Collins | 12 | Daughter | — | Pennsylvania |
| 48 | Milton Morris | 25 | Head | Machinist | Illinois |
| 49 | Helen Morris | 25 | Wife | City Nurse | New Jersey |
| 50 | Robert Morris | 0 | Son | — | Illinois |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)