MW
Mary William — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this Mary William across the 1920 and 1930 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1909), then head of a 4-person household.
Age 21
b. ~1909
Female
Daughter
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | William |
| Given Name | Mary M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| 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 |
| Est. Birth Year | ~1909 |
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 |
|---|---|---|---|---|
| Harry William | Head | — | 51 | ~1879 |
| Charles William | Son | — | 24 | ~1906 |
| Mary William | Daughter | — | 21 | ~1909 |
| Ella William | Spouse | — | 51 | ~1879 |
Census Appearances
1920
Baltimore, Maryland
Daughter, age 10
Baltimore, Maryland · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Daughter, age 21
Baltimore, Maryland · implied b. ~1909 — 4 household members
| Surname | William |
| Given Name | Mary M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| 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 |
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 William across 2 US Census years (1920 and 1930) in Baltimore, Maryland, using XGBoost record linkage.
Show:
This person
Anchor record
Mary William
Daughter · 1930 · age 21 · b. ~1909 · Maryland
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Sibling
Charles William
Sibling · 1930 · age 24
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
27 people indexed on this census page (ia:1930:15thcensus863unit:0812)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Edgar P Buckler | 53 | Head | Plumber | Maryland |
| 52 | Frances A Buckler | 50 | Wife | — | Maryland |
| 53 | Francis E Buckler | 24 | Son | — | Maryland |
| 54 | Harriet M Buckler | 23 | Daughter | Clerk | Maryland |
| 55 | William J Buckler | 21 | Son | Typist | Maryland |
| 56 | Mary A Buckler | 15 | Daughter | Chauffeur | Maryland |
| 57 | Frances Buckler | 13 | Daughter | — | Maryland |
| 58 | Harriet S Molesley | 78 | Mother | — | Virginia |
| 59 | Charles Stigler | 57 | Head | — | Maryland |
| 60 | Annie L Stigler | 57 | Wife | — | Maryland |
| 61 | Effie Stigler | 25 | Daughter | Secretary | Maryland |
| 62 | Gladys Stigler | 23 | Daughter | Secretary | Maryland |
| 63 | Harry William | 51 | Head | Brakeman | Maryland |
| 64 | Ella M William | 51 | Wife | — | Maryland |
| 65 | Charles R William | 24 | Son | — | Maryland |
| 66 | Mary M William THIS PERSON | 21 | Daughter | — | Maryland |
| 67 | Le Roy Clark | 34 | Head | Typist | Maryland |
| 68 | Cora Clark | 33 | Wife | — | Maryland |
| 69 | Dorothy C Clark | 12 | Daughter | — | Maryland |
| 70 | Charles L Clark | 10 | Son | — | Maryland |
| 71 | Gordon R Clark | 5 | Son | — | Maryland |
| 72 | Mardell E Clark | 3 | Daughter | — | Maryland |
| 73 | John D Young | 31 | Head | — | Maryland |
| 74 | Cora B Young | 33 | Wife | — | Maryland |
| 75 | John D Jr Young | 14 | Son | — | Maryland |
| 76 | George W Young | 11 | Son | — | Maryland |
| 77 | Margaret Daugenberger | 19 | Boarder | — | 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)