MK
Mary Kramer — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this Mary Kramer across the 1930 and 1940 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1912), then head of a 7-person household.
Age 18
b. ~1912
Female
Daughter
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Kramer |
| Given Name | Mary A. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Occupation | Cashier |
| Industry | Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Cashier |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1912 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Charles Kramer | Head | — | 47 | ~1883 |
| Mary Kramer | Other | — | 45 | ~1885 |
| Mary Kramer | Daughter | — | 18 | ~1912 |
| Carl Kramer | Son | — | 21 | ~1909 |
| Catherine Kramer | Daughter | — | 15 | ~1915 |
| Charles Kramer | Son | — | 5 | ~1925 |
| Howard Kramer | Son | — | 23 | ~1907 |
Census Appearances
1930
Baltimore, Maryland
Daughter, age 18
Baltimore, Maryland · implied b. ~1912 — 7 household members
| Surname | Kramer |
| Given Name | Mary A. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Cashier |
| Industry | Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Other, age 28
Baltimore-City-County, Maryland · implied b. ~1912 — 40 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cramer |
| Given Name | Margaret |
| Relationship to Head | Inmate |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Frederick |
| Highest Grade | Hs 4 |
| 1935 Residence | Maryland |
| 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 Kramer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kramer
Daughter · 1930 · age 18 · b. ~1912 · Maryland
★ You are viewing this record
Sibling
Carl Kramer
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Howard Kramer
Sibling · 1930 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Kramer
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Kramer
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:1930:15thcensus868unit:0291)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Earl Hudgins | 14 | Head | — | Maryland |
| 52 | Arnold Hudgins | 23 | Son | Teacher | Maryland |
| 53 | Verna Hudgins | 18 | daughter | — | Maryland |
| 54 | Clarence Francis | 49 | Head | School Teacher | Maryland |
| 55 | Emma Francis | 45 | wife-H | — | Maryland |
| 56 | Emil Maly | 28 | Head | Electrician | Maryland |
| 57 | Amelia Maly | 26 | wife-H | — | Maryland |
| 58 | Anna Keleh | 54 | Head | — | Maryland |
| 59 | Herbert Keleh | 22 | son | Electrician | Maryland |
| 60 | Frederick Keleh | 18 | son | Printer | Maryland |
| 61 | Mary Thomas | 58 | Head | Sorter | Maryland |
| 62 | Carl Thomas | 27 | son | Clerk | Maryland |
| 63 | Mary Thomas | 24 | daughter | — | Maryland |
| 64 | Anne Marie Thomas | 2 | daughter | — | Maryland |
| 65 | Frederick Wagner | 68 | Head | — | Maryland |
| 66 | Lena Crosby | 36 | daughter | Store | Maryland |
| 67 | Hugh Crosby | 16 | son | Messenger | Maryland |
| 68 | Leona Crosby | 15 | daughter | — | Maryland |
| 69 | James Crosby | 11 | son | — | Maryland |
| 70 | L. Smith | 40 | Head | Conductor | Maryland |
| 71 | Lillian J. Smith | 36 | wife-H | — | Maryland |
| 72 | Mary L. Smith | 13 | daughter | — | Maryland |
| 73 | Joseph Smith | 11 | son | — | Maryland |
| 74 | Regina Smith | 9 | daughter | — | Maryland |
| 75 | Lillian Smith | 7 | daughter | — | Maryland |
| 76 | George Hofsteder | 49 | Head | Packer | Maryland |
| 77 | Blanche Hofsteder | 47 | Wife-H | — | Maryland |
| 78 | George Hofsteder | 19 | son | Laborer | Maryland |
| 79 | George Hodges | 44 | Head | Fireman | Maryland |
| 80 | Mary Hodges | 46 | wife-H | — | Maryland |
| 81 | Frank Hodges | 22 | son | Packer | Maryland |
| 82 | Bernard Hodges | 14 | son | — | Maryland |
| 83 | Jerome Hodges | 13 | son | — | Maryland |
| 84 | Charles Smith | 55 | Head | Clerk | Maryland |
| 85 | Mary Smith | 57 | wife-H | — | Maryland |
| 86 | Will Smith | 23 | son | Laborer | Maryland |
| 87 | John Smith | 22 | son | Clerk | Maryland |
| 88 | Eugene Smith | 19 | son | Clerk | Maryland |
| 89 | Harry Smith | 15 | son | — | Maryland |
| 90 | Charles Kramer | 47 | Head | Collector | Maryland |
| 91 | Mary Kramer | 45 | wife-H | — | Maryland |
| 92 | Howard Kramer | 23 | son | Agent | Maryland |
| 93 | Carl Kramer | 21 | son | — | Maryland |
| 94 | Mary A. Kramer THIS PERSON | 18 | daughter | Cashier | Maryland |
| 95 | Catherine Kramer | 15 | daughter | — | Maryland |
| 96 | Charles Kramer | 5 | son | — | Maryland |
| 97 | Ernest Feedler | 52 | Head | — | Germany |
| 98 | Willie Feedler | 43 | wife-H | — | Virginia |
| 99 | Mildred Feedler | 18 | daughter | — | Maryland |
| 100 | H. C. Lumkehn | 53 | Head | Merchant | 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)