MC
Mary Cramer — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Washington, Maryland
Our Model Tree links this Mary Cramer across the 1930 and 1940 US Censuses in Washington, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 6-person household.
Age 4
b. ~1926
Female
Daughter
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Washington, Maryland |
| Surname | Cramer |
| Given Name | Mary B |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Occupation | none |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Hagerstown City |
| Est. Birth Year | ~1926 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Cramer | Daughter | — | 4 | ~1926 |
| Merle Cramer | Son | — | 12 | ~1918 |
| Irene Cramer | Daughter | — | 8 | ~1922 |
| Alice Cramer | Other | — | 39 | ~1891 |
| Carl Cramer | Son | — | 14 | ~1916 |
| John Cramer | Head | — | 38 | ~1892 |
Census Appearances
1930
Washington, Maryland
Daughter, age 4
Washington, Maryland · implied b. ~1926 — 6 household members
| Surname | Cramer |
| Given Name | Mary B |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Washington-County, Maryland
Daughter, age 14
Washington-County, Maryland · implied b. ~1926 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kramer |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Hagerstown |
| 1935 Residence (County) | Washington |
| Highest Grade | H-1 |
| 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 Mary Cramer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cramer
Daughter · 1930 · age 4 · b. ~1926 · Maryland
★ You are viewing this record
Sibling
Carl Cramer
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Merle Cramer
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Irene Cramer
Sibling · 1930 · age 8
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 — Washington, Maryland
Open full size
1930 US Federal Census — Washington, Maryland
Page Contents
50 people indexed on this census page (ia:1930:15thcensus881unit:0009)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Leonard E Miller | 29 | Son | None | Virginia |
| 2 | Emma Mary Miller | 45 | Sister | Marker | Virginia |
| 3 | Harry E Miller | 36 | Brother | Moulder | Virginia |
| 4 | David W Ridessner | 48 | Head | Carpenter | Maryland |
| 5 | Mary E Ridessner | 51 | Wife-H | None | Pennsylvania |
| 6 | Melva Ridessner | 21 | Daughter | Secretary | Maryland |
| 7 | Herman Ridessner | 19 | Son | None | Maryland |
| 8 | Arthur M Ridessner | 14 | Son | None | Maryland |
| 9 | David W Ridessner | 8 | Son | None | Maryland |
| 10 | Mabel Clark | 30 | Head-H | None | Maryland |
| 11 | Bettie Clark | 8 | Daughter | None | Maryland |
| 12 | Edward Clark | 6 | Son | None | Delaware |
| 13 | Annie Dodd | 49 | Mother | None | Maryland |
| 14 | Fillessa Dodd | 24 | Sister | Sales Lady | Pennsylvania |
| 15 | Elmer Dodd | 21 | Brother | None | Pennsylvania |
| 16 | Rudolph Hardy | 42 | Head | Flagman | Maryland |
| 17 | Annie Hardy | 45 | Wife-H | None | Maryland |
| 18 | George M Hardy | 14 | Son | Inspector | Maryland |
| 19 | Charles E Hardy | 12 | Son | None | Maryland |
| 20 | James W Hardy | 8 | Son | None | Maryland |
| 21 | Joseph Culbert | 58 | Brother | Labour | Maryland |
| 22 | John R Cramer | 38 | Head | Fireman | Maryland |
| 23 | Alice B Cramer | 39 | Wife-H | None | Maryland |
| 24 | Carl B Cramer | 14 | Son | None | Maryland |
| 25 | Merle B Cramer | 12 | Son | None | Maryland |
| 26 | Irene B Cramer | 8 | Daughter | None | Maryland |
| 27 | Mary B Cramer THIS PERSON | 4 | Daughter | None | Maryland |
| 28 | Harry Doarnberger | 54 | Head | Drill Presser | Maryland |
| 29 | Nannie Doarnberger | 44 | Wife-H | None | Virginia |
| 30 | Grayson G Doarnberger | 18 | Son | Machinist | Maryland |
| 31 | Jane E Doarnberger | 14 | Daughter | None | Maryland |
| 32 | John A Doarnberger | 11 | Son | None | Maryland |
| 33 | Jack R Doarnberger | 6 | Son | None | Maryland |
| 34 | Lewis E Doarnberger | 4 | Son | None | Maryland |
| 35 | Jacob B Musey | 53 | Head | Asst Inspector | Maryland |
| 36 | Clara B Musey | 48 | Wife-H | None | Maryland |
| 37 | Ethel M Sprecher | 27 | Daughter | None | Maryland |
| 38 | Herbert G Sprecher | 30 | Son Law | Truck Driver | Maryland |
| 39 | Clara L Sprecher | 24 | Daughter | Sales Lady | Maryland |
| 40 | Louise J Sprecher | 21 | Daughter | Sales Lady | Maryland |
| 41 | John L Sprecher | 20 | Son | Reeler | Pennsylvania |
| 42 | George E Sprecher | 18 | Son | None | Pennsylvania |
| 43 | Guy C Sprecher | 17 | Son | None | Pennsylvania |
| 44 | Reuben M Sprecher | 14 | Son | None | Maryland |
| 45 | Thomas E Rafter | 28 | Head-H | Janitor | Maryland |
| 46 | Arthur L Rafter | 7 | Son | None | Maryland |
| 47 | Roy Jr Rafter | 4 | Son | None | Maryland |
| 48 | Joseph L Rafter | 2 | Son | None | Maryland |
| 49 | Catherine Cook | 62 | Head-H | Matron | Maryland |
| 50 | Calvin L Shipley | 85 | Uncle | None | 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)