WS
William Schaefer — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this William Schaefer across the 1930 and 1940 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed) — first a son (b.~1907), then head of a 8-person household.
Age 23
b. ~1907
Male
Son
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Schaefer |
| Given Name | William P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1907 |
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 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Caroline Schaefer | Spouse | — | 45 | ~1885 |
| Margaret Schaefer | Daughter | — | 13 | ~1917 |
| Calvin Schaefer | Son | — | 15 | ~1915 |
| Jacob Schaefer | Head | — | 43 | ~1887 |
| George Schaefer | Son | — | 10 | ~1920 |
| William Schaefer | Son | — | 23 | ~1907 |
| Robert Schaefer | Son | — | 8 | ~1922 |
| John Schaefer | Son | — | 17 | ~1913 |
Census Appearances
1930
Baltimore, Maryland
Son, age 23
Baltimore, Maryland · implied b. ~1907 — 8 household members
| Surname | Schaefer |
| Given Name | William P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Head, age 33
Baltimore-City-County, Maryland · implied b. ~1907 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Schaffer |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | BALTIMORE CITY |
| 1935 Residence (County) | Baltimore City |
| Occupation | Machine Operator |
| Industry | Steel Works |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | No 6 |
| 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 Schaefer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Schaefer
Son · 1930 · age 23 · b. ~1907 · Maryland
★ You are viewing this record
Sibling
John Schaefer
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Schaefer
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Schaefer
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Schaefer
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Calvin Schaefer
Sibling · 1930 · age 15
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
1930 US Federal Census — Baltimore, Maryland
Open full size
1930 US Federal Census — Baltimore, Maryland
Page Contents
50 people indexed on this census page (ia:1930:15thcensus848unit:0282)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anna Schubert | 15 | daughter | — | Maryland |
| 2 | Adolph Schubert | 11 | son | — | Maryland |
| 3 | Henry Wolf | 48 | Roomer | — | Maryland |
| 4 | George R. Hogg | 44 | Head | Presser | Maryland |
| 5 | Mary Hogg | 41 | Wife | Laborer | Maryland |
| 6 | Lillian Hogg | 16 | Daughter | — | Maryland |
| 7 | William Hogg | 13 | Son | Floor Boy | Maryland |
| 8 | George Myer | 47 | Head | — | Maryland |
| 9 | Sophia Myer | 45 | Wife | Sergeant Police | Maryland |
| 10 | William H. Myer | 15 | Son | — | Maryland |
| 11 | William G. Schoff | 50 | Head | — | Maryland |
| 12 | Elizabeth M. Schoff | 48 | Wife | Charge Of House | Maryland |
| 13 | Howard W. Schoff | 18 | Son | — | Maryland |
| 14 | T. Clement Jr. Schoff | 16 | Son | Solicitor Clerk | Maryland |
| 15 | Tom R. Teasley | 54 | Head | Buyer | Maryland |
| 16 | Annie M. Teasley | 42 | Wife | Laborer | Maryland |
| 17 | Jerome Teasley | 8 | Son | — | Maryland |
| 18 | Calvin Teasley | 5 | Son | — | Maryland |
| 19 | Josephine Gottler | 33 | Roomer | — | Maryland |
| 20 | Obelia Gozianik | 29 | Roomer | Work | Maryland |
| 21 | Joseph H. Schmuck | 34 | Head | — | Maryland |
| 22 | Katharine Schmuck | 34 | Wife | Sales Woman | Maryland |
| 23 | Jacob J. Schaefer | 43 | Head | — | Maryland |
| 24 | Caroline Schaefer | 45 | Wife | Laborer | Maryland |
| 25 | William P. Schaefer THIS PERSON | 23 | Son | — | Maryland |
| 26 | John H. Schaefer | 17 | Son | Ice Man | Maryland |
| 27 | Calvin Schaefer | 15 | Son | Ice Man | Maryland |
| 28 | Margaret Schaefer | 13 | Daughter | Waitress | Maryland |
| 29 | George W. Schaefer | 10 | Son | — | Maryland |
| 30 | Robert Schaefer | 8 | Son | — | Maryland |
| 31 | Stanley Filipowicz | 40 | Head | Pipe Fitter | Poland |
| 32 | Sophia Filipowicz | 39 | Wife | — | Poland |
| 33 | Joseph Filipowicz | 19 | Son | Usher | Maryland |
| 34 | Mamie Reir | 42 | Head-H | — | Maryland |
| 35 | Germaine Reir | 20 | Daughter | — | Maryland |
| 36 | Antoinette Reir | 10 | Daughter | — | Maryland |
| 37 | John Walasunas | 26 | Head | — | Texas |
| 38 | Mary Walasunas | 23 | Wife | Chauffeur | Maryland |
| 39 | Loraine Walasunas | 3 | Daughter | — | Pennsylvania |
| 40 | Benjamin Metzger | 36 | Head | Boiler Maker | Maryland |
| 41 | Edna E. Metzger | 34 | Wife | — | Maryland |
| 42 | Estel M. Metzger | 16 | Daughter | — | Maryland |
| 43 | Myron Metzger | 17 | Brother | Laborer | Maryland |
| 44 | Joseph E. Wendt | 35 | Head | Auto Repair | Maryland |
| 45 | Margaret Wendt | 30 | Wife | Tailor | Maryland |
| 46 | Thelma Wendt | 14 | Daughter | Laborer | Maryland |
| 47 | Leona Wendt | 12 | Daughter | — | Maryland |
| 48 | Margaret Wendt | 9 | Daughter | — | Maryland |
| 49 | Joseph Jr. Wendt | 2 | Son | — | Maryland |
| 50 | John H. Brauer | 60 | Head | Laborer | Maryland |
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)