WF
William Frederick — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this William Frederick across the 1920 and 1930 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed) — first a head (b.~1888), then head of a 7-person household.
Age 42
b. ~1888
Male
Head
Born: Maryland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Frederick |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 21 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Occupation | Special |
| Industry | Post Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 2000 |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Special |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1888 |
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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Grace Frederick | Spouse | — | 27 | ~1903 |
| Violetta Frederick | Daughter | — | 16 | ~1914 |
| William Frederick | Son | — | 15 | ~1915 |
| William Frederick | Head | — | 42 | ~1888 |
| Bernard Frederick | Son | — | 3 | ~1927 |
| Paul Frederick | Son | — | 4 | ~1926 |
| Anita Frederick | Daughter | — | ~1930 |
Census Appearances
1920
Baltimore, Maryland
Head, age 33
Baltimore, Maryland · implied b. ~1887 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Chauffeur |
| Industry | Grocer Truck |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Head, age 42
Baltimore, Maryland · implied b. ~1888 — 7 household members
| Surname | Frederick |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 21 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Special |
| Industry | Post Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 2000 |
| 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 Frederick across 2 US Census years (1920 and 1930) in Baltimore, Maryland, using XGBoost record linkage.
Show:
This person
Anchor record
William Frederick
Head · 1930 · age 42 · b. ~1888 · Maryland
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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:1930:15thcensus857unit:0947)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lonnie Smith | 54 | Head | Laborer | North Carolina |
| 2 | Henrietta Smith | 49 | Wife | — | Virginia |
| 3 | Lucille Smith | 12 | Daughter | — | Virginia |
| 4 | William Pickett | 47 | Roomer | — | North Carolina |
| 5 | Joseph Alston | 71 | Head | Janitor | North Carolina |
| 6 | Carrie J. Alston | 56 | Wife | — | North Carolina |
| 7 | Ernest T. Alston | 22 | Son | Laborer | Maryland |
| 8 | Walter C. Alston | 20 | Son | Special | North Carolina |
| 9 | Harris William E. Alston | 21 | Nephew | Agent | North Carolina |
| 10 | John H. Alston | 4 | Gr. Child | — | Georgia |
| 11 | Thomas O. Randall | 46 | Head | Porter | Maryland |
| 12 | Iva G. Randall | 36 | Wife | — | Maryland |
| 13 | Lillian J. Randall | 17 | Daughter | — | Maryland |
| 14 | Carter O. Randall | 15 | Son | — | Maryland |
| 15 | Thomas O. Jr. Randall | 12 | Son | — | Maryland |
| 16 | Bernice I. Randall | 10 | Daughter | — | Maryland |
| 17 | Alford W. Randall | 9 | Son | — | Maryland |
| 18 | Edward A. Randall | 4 | Son | — | Maryland |
| 19 | Ruth Randall | 1 | Daughter | — | Maryland |
| 20 | William T. Carter | 21 | Brother in law | Porter | Maryland |
| 21 | Arling Dickerson | 31 | Roomer | House Maid | Maryland |
| 22 | Cornelius Dowell | 55 | Head | Clerk | Maryland |
| 23 | Mary Dowell | 40 | Wife | — | Virginia |
| 24 | James C. Dowell | 14 | Son | — | Maryland |
| 25 | Maxwell Dowell | 5 | Son | — | Maryland |
| 26 | Doris G. Dowell | 3 | Daughter | — | Maryland |
| 27 | Lydia R. Banks | 39 | Sister in law | House Maid | Virginia |
| 28 | Sylvester Banks | 18 | Nephew | — | Maryland |
| 29 | Nathaniel Banks | 15 | Nephew | — | Maryland |
| 30 | William Frederick THIS PERSON | 42 | Head | Special | Maryland |
| 31 | Grace M. Frederick | 27 | Wife | — | Washington D.C. |
| 32 | Violetta Frederick | 16 | Daughter | — | Maryland |
| 33 | William Jr. Frederick | 15 | Son | — | Maryland |
| 34 | Paul R. Frederick | 4 | Son | — | Maryland |
| 35 | Bernard S. Frederick | 3 | Son | — | Maryland |
| 36 | Anita L. Frederick | 0 | Daughter | — | Maryland |
| 37 | Sam Lee | 51 | Head | Proprietor | China |
| 38 | John Banks | 43 | Roomer | Labour | Maryland |
| 39 | John Blackwell | 48 | Head | Proprietor | Virginia |
| 40 | Annie L. Blackwell | 40 | Wife | — | Virginia |
| 41 | Percila Blackwell | 22 | Daughter | House Maid | Virginia |
| 42 | Charles C. Blackwell | 19 | Son | Helper | Virginia |
| 43 | Samuel T. Blackwell | 17 | Son | Butler | Virginia |
| 44 | Cora V. Blackwell | 11 | Daughter | House Maid | Virginia |
| 45 | Mamie Blackwell | 9 | Daughter | — | Virginia |
| 46 | Walter J. Blackwell | 16 | Son | Helper | Virginia |
| 47 | Wallace E. Blackwell | 13 | Son | — | Virginia |
| 48 | Luzilau M. Clark | 25 | Roomer | House Maid | Maryland |
| 49 | Ira J. Turner | 21 | Roomer | House Maid | Maryland |
| 50 | Frances Libbs | 20 | Roomer | House Maid | 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)