WP
William Pierce — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this William Pierce across the 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 8-person household.
Age 13
b. ~1927
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Pierce |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Highest Grade | Yes 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1927 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Margie Pierce | Daughter | — | 12 | ~1928 |
| Mary Pierce | Daughter | — | 10 | ~1930 |
| Mildred Pierce | Daughter | — | 5 | ~1935 |
| Richard Pierce | Head | — | 47 | ~1893 |
| William Pierce | Son | — | 13 | ~1927 |
| Richard Pierce | Son | — | 7 | ~1933 |
| Robert Pierce | Son | — | 1 | ~1939 |
| Rose Pierce | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Baltimore, Maryland
Son, age 1
Baltimore, Maryland · implied b. ~1929 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierce |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Son, age 13
Baltimore-City-County, Maryland · implied b. ~1927 — 8 household members
| Surname | Pierce |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Highest Grade | Yes 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 William Pierce across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Pierce
Son · 1940 · age 13 · b. ~1927 · Maryland
★ You are viewing this record
Sibling
Mary Pierce
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Pierce
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Pierce
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Pierce
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margie Pierce
Sibling · 1940 · age 12
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 — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01509-00648)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Jenkins | 19 | Partner | Housework | Maryland |
| 2 | Mildred Miller | 28 | Head | — | Maryland |
| 3 | Idris Miller | 8 | Daughter | — | Maryland |
| 4 | Elaine Miller | 4 | Daughter | — | Maryland |
| 5 | Raymond Dean | 43 | Head | Laborer | Maryland |
| 6 | Sheila Dean | 29 | Wife | — | Virginia |
| 7 | Julia Cadney | 20 | Lodger | Dishwasher | Maryland |
| 8 | Eleanor Cadney | 20 | Lodger's Wife | — | Maryland |
| 9 | David Cadney | 1 | Lodger's Son | — | Maryland |
| 10 | George Broughton | 44 | Head | — | Maryland |
| 11 | Elmer William | 38 | Lodger | Laborer | N. Carolina |
| 12 | George Smiken | 40 | Lodger | Laborer | Virginia |
| 13 | George Trusty | 60 | Head | Laborer | Maryland |
| 14 | Cora Trusty | 55 | Wife | — | Maryland |
| 15 | Clifford Caroline | 31 | Son | Packer | Maryland |
| 16 | Lawrence Caroline | 11 | Step Son | — | Maryland |
| 17 | Elmer Caroline | 8 | Step Son | — | Maryland |
| 18 | Bernard Caroline | 6 | Step Son | — | Maryland |
| 19 | Bernadine Caroline | 6 | Step Daughter | — | Maryland |
| 20 | Veyney Caroline | 4 | Step Son | — | Maryland |
| 21 | Charles Daniels | 38 | Head | — | Maryland |
| 22 | Mary Daniels | 25 | Wife | — | Virginia |
| 23 | Albert Daniels | 9 | Son | — | Maryland |
| 24 | Morris Daniels | 8 | Son | — | Maryland |
| 25 | Dorothy Daniels | 6 | Daughter | — | Maryland |
| 26 | Linwood Daniels | 5 | Son | — | Maryland |
| 27 | Robert Daniels | 3 | Son | — | Maryland |
| 28 | James Haimes | 20 | Head | Laborer | Maryland |
| 29 | Cheffa Haimes | 19 | Wife | — | Pennsylvania |
| 30 | Shirley Haimes | 1 | Daughter | — | Maryland |
| 31 | Richard Pierce | 47 | Head | Painter | Maryland |
| 32 | Rose Pierce | 40 | Wife | — | Maryland |
| 33 | William Pierce THIS PERSON | 13 | Son | — | Maryland |
| 34 | Margie Pierce | 12 | Daughter | — | Maryland |
| 35 | Mary Pierce | 10 | Daughter | — | Maryland |
| 36 | Richard Pierce | 7 | Son | — | Maryland |
| 37 | Mildred Pierce | 5 | Daughter | — | Maryland |
| 38 | Robert Pierce | 1 | Son | — | Maryland |
| 39 | Stanley Mlynski | 47 | Head | Stewardne | Poland |
| 40 | Alicia Mlynski | 40 | Wife | — | Maryland |
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)