KM
Katherine Martin — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this Katherine Martin across the 1930 and 1940 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1912), then head of a 10-person household.
Age 18
b. ~1912
Female
Daughter
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Martin |
| Given Name | Katherine |
| 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 | Waitress |
| Industry | Lunch Room |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Waitress |
| Township / Ward | Raspeburg Colgate |
| 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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Katherine | Age | Birth yr |
|---|---|---|---|---|
| Anna Martin | Daughter | — | 16 | ~1914 |
| Charles Martin | Son | — | 8 | ~1922 |
| Emma Martin | Daughter | — | 14 | ~1916 |
| Katherine Martin | Daughter | — | 18 | ~1912 |
| Mary Martin | Daughter | — | 1 | ~1929 |
| Stephen Martin | Other | — | 30 | ~1900 |
| Frank Martin | Son | — | 12 | ~1918 |
| Mary Martin | Spouse | — | 40 | ~1890 |
| Edward Martin | Head | — | 41 | ~1889 |
| Stephen Martin | Son | — | 10 | ~1920 |
Census Appearances
1930
Baltimore, Maryland
Daughter, age 18
Baltimore, Maryland · implied b. ~1912 — 10 household members
| Surname | Martin |
| Given Name | Katherine |
| 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 | Waitress |
| Industry | Lunch Room |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Spouse, age 29
Baltimore-County, Maryland · implied b. ~1911 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Kathryn E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore |
| Occupation | secretary |
| Industry | oil company |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| 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 Katherine Martin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Katherine Martin
Daughter · 1930 · age 18 · b. ~1912 · Maryland
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Sibling
Emma Martin
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Martin
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Martin
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Martin
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Martin
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stephen Martin
Sibling · 1930 · age 10
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:1930:15thcensus847unit:0588)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Carl Hajek | 45 | Head | Machinist | Rumania |
| 2 | Anna Hajek | 43 | Wife | — | Austria |
| 3 | Mary Hajek | 17 | Daughter | Maid | Maryland |
| 4 | Joseph Hajek | 15 | Son | — | Maryland |
| 5 | Eva Hajek | 7 | Daughter | — | Maryland |
| 6 | Herman Gertel | 26 | Head | Operator | Maryland |
| 7 | Eva Gertel | 21 | Wife | Operator | Maryland |
| 8 | James V. Stiner | 47 | Head | Metal Polisher | Czechoslovakia |
| 9 | Emma T. Stiner | 45 | Wife | — | Maryland |
| 10 | Vera E. Colburn | 11 | Boarder | — | Maryland |
| 11 | William H. Cook | 41 | Head | Asst Houseworker | Maryland |
| 12 | Martha V. Cook | 36 | Wife | — | Maryland |
| 13 | Muriel V. Cook | 14 | Daughter | — | Maryland |
| 14 | William Jr. Cook | 7 | Son | — | Maryland |
| 15 | Harry H. Moreland | 54 | Head | Inspector | Switzerland |
| 16 | Cora M. Moreland | 50 | Wife | Hostess | Maryland |
| 17 | Joseph Steiner | 34 | Head | Watchman | Maryland |
| 18 | Edward J. Martin | 41 | Head | Baby Maker | Maryland |
| 19 | Mary A. Martin | 40 | Wife | — | Maryland |
| 20 | Katherine Martin THIS PERSON | 18 | Daughter | Waitress | Maryland |
| 21 | Anna B. Martin | 16 | Daughter | Presser | Maryland |
| 22 | Emma E. Martin | 14 | Daughter | — | Maryland |
| 23 | Frank J. Martin | 12 | Son | — | Maryland |
| 24 | Stephen J. Martin | 10 | Son | — | Maryland |
| 25 | Charles Martin | 8 | Son | — | Maryland |
| 26 | Mary Martin | 1 | Daughter | — | Maryland |
| 27 | Stephen Martin | 30 | Brother | Helper | Maryland |
| 28 | Alfred G. Hughes | 26 | Head | Salesman | Maryland |
| 29 | Mary Hughes | 27 | Wife | — | Maryland |
| 30 | Alberta Hughes | 7 | Daughter | — | Maryland |
| 31 | Alfred Jr. Hughes | 5 | Son | — | Maryland |
| 32 | Annie M. Hughes | 3 | Daughter | — | Maryland |
| 33 | Earl Hughes | 1 | Son | — | Maryland |
| 34 | George Pullum | 49 | Boarder | Laborer | Maryland |
| 35 | Peyton Lewis | 55 | Boarder | Laborer | Virginia |
| 36 | August H. Horde | 49 | Head | Clerk | Germany |
| 37 | Lillian K. Horde | 43 | Wife | — | Maryland |
| 38 | Christian Gutermuth | 55 | Head | Merchant | Maryland |
| 39 | Ernestine Gutermuth | 45 | Wife | — | Maryland |
| 40 | Christian Jr. Gutermuth | 23 | Son | Packer | Maryland |
| 41 | Mary E. Gutermuth | 15 | Daughter | Tile Clerk | Maryland |
| 42 | Florence Gutermuth | 14 | Daughter | — | Maryland |
| 43 | Franklin W. Gutermuth | 13 | Son | — | Maryland |
| 44 | Thomas M. Gutermuth | 12 | Daughter | — | Maryland |
| 45 | Edward E. Gutermuth | 8 | Son | — | Maryland |
| 46 | Howard A. Moffett | 60 | Head | Boat Livery | Maryland |
| 47 | Sophia E. Moffett | 56 | Wife | — | Maryland |
| 48 | William H. Kemp | 25 | Son-in-law | Ruffer | Pennsylvania |
| 49 | Mary W. Kemp | 25 | Daughter | — | Maryland |
| 50 | Martina V. Kemp | 3 | Granddaughter | — | 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)