MD
Mary Davidson — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Prince George, Maryland
Our Model Tree links this Mary Davidson across the 1920 and 1930 US Censuses in Prince George, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1910), then head of a 8-person household.
Age 20
b. ~1910
Female
Daughter
Born: Indiana
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Prince George, Maryland |
| Surname | Davidson |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Indiana |
| Additional Details | |
| Occupation | Auditor |
| Industry | Department store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Auditor |
| Township / Ward | Queen Anne District 7 |
| Est. Birth Year | ~1910 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Margaret Davidson | Daughter | — | 13 | ~1917 |
| Mary Davidson | Daughter | — | 20 | ~1910 |
| Helen Davidson | Daughter | — | 12 | ~1918 |
| Frances Davidson | Daughter | — | 18 | ~1912 |
| John Davidson | Head | — | 51 | ~1879 |
| George Davidson | Son | — | 22 | ~1908 |
| John Davidson | Son | — | 16 | ~1914 |
| Odella Davidson | Spouse | — | 42 | ~1888 |
Census Appearances
1920
Prince George, …
Daughter, age 10
Prince George, Maryland · implied b. ~1910 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Indiana |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Prince George, …
Daughter, age 20
Prince George, Maryland · implied b. ~1910 — 8 household members
| Surname | Davidson |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Indiana |
| Occupation | Auditor |
| Industry | Department store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Davidson across 2 US Census years (1920 and 1930) in Prince George, Maryland, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Davidson
Daughter · 1930 · age 20 · b. ~1910 · Maryland
★ You are viewing this record
Sibling
John Davidson
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Davidson
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Davidson
Sibling · 1930 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Davidson
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Davidson
Sibling · 1930 · age 18
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 — Prince George, Maryland
Open full size
1930 US Federal Census — Prince George, Maryland
Page Contents
50 people indexed on this census page (ia:1930:15thcensus877unit:0932)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | William Fitzgerald | 6 | Son | — | Maryland |
| 52 | Charles Fitzgerald | 4 | Son | — | Maryland |
| 53 | Katie Fitzgerald | 2 | Daughter | — | Maryland |
| 54 | William F. Mise | 38 | Head | Merchant | North Dakota |
| 55 | Rose Mise | 45 | Wife | — | Pennsylvania |
| 56 | Dr. John D. Kuhn | 57 | Brother-in-law | Physician | Pennsylvania |
| 57 | John D. Jr. Kuhn | 12 | Nephew | — | Maryland |
| 58 | Thomas Kerr | 70 | Head | — | Maryland |
| 59 | Frances L. Kerr | 66 | Wife | — | Maryland |
| 60 | Eugene Kerr | 43 | Head | Farmer | Maryland |
| 61 | Thomas Kerr | 45 | Brother | Laborer | Maryland |
| 62 | John M. Edelen | 66 | Head | Laborer | Maryland |
| 63 | Mary A. Edelen | 47 | Wife | — | Maryland |
| 64 | Mary A. Beall | 72 | Head | — | Maryland |
| 65 | Thomas H. Beall | 35 | Son | Farmer | Maryland |
| 66 | Charles G. Beall | 29 | Son | — | Maryland |
| 67 | Clara C. Beall | 39 | Daughter | Artist Helper | Maryland |
| 68 | Estelle Beall | 30 | Niece | — | Maryland |
| 69 | Benjamin H. Jones | 36 | Nephew | — | Maryland |
| 70 | Oscar L. Butler | 40 | Head | Farmer | Maryland |
| 71 | Catherine E. Butler | 38 | Wife | — | Maryland |
| 72 | Gail Harley | 4 | Nephew | — | District Columbia |
| 73 | Edward L. Harley | 2 | Nephew | — | District Columbia |
| 74 | Robert Butler | 13 | Nephew | — | Maryland |
| 75 | Lewis Proctor | 30 | Brother-in-law | — | Maryland |
| 76 | Mary R. Proctor | 76 | Aunt | — | Maryland |
| 77 | James Davidson | 59 | Head | Farm Manager | Scotland |
| 78 | Jessie M. Davidson | 50 | Wife | — | Scotland |
| 79 | James Jr. Davidson | 14 | Son | — | Maryland |
| 80 | William A. Davidson | 11 | Son | — | Maryland |
| 81 | Thomas Mcgarvie | 39 | Laborer | Laborer | Scotland |
| 82 | William R. Duncan | 27 | Head | Laborer | Scotland |
| 83 | Johanna B. Duncan | 25 | Wife | — | Scotland |
| 84 | John S. Davidson | 51 | Head | Foreman | Scotland |
| 85 | Odella Davidson | 42 | Wife | — | Indiana |
| 86 | George S. Davidson | 22 | Son | Salesman | Indiana |
| 87 | Mary J. Davidson THIS PERSON | 20 | Daughter | Auditor | Indiana |
| 88 | Frances O. Davidson | 18 | Daughter | Bundler | Illinois |
| 89 | John S. Davidson | 16 | Son | — | Maryland |
| 90 | Margaret M. Davidson | 13 | Daughter | — | Maryland |
| 91 | Helen M. Davidson | 12 | Daughter | — | Maryland |
| 92 | Ashley Butler | 32 | Head | Laborer | Virginia |
| 93 | Cora S. Butler | 35 | Wife | — | Virginia |
| 94 | Ashley L. Butler | 13 | Son | — | Virginia |
| 95 | Annie M. Butler | 10 | Daughter | — | District Columbia |
| 96 | Elizabeth A. Butler | 4 | Daughter | — | District Columbia |
| 97 | Cora A. Butler | 2 | Daughter | — | Maryland |
| 98 | Charles R. Butler | 37 | Brother | Laborer | Virginia |
| 99 | Richard S. Halley | 57 | Head | Foreman | Maryland |
| 100 | Agnes A. Halley | 42 | Wife | — | Maryland |
Related Census Records
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)