JK
John Kramer — 1930 US Census Record
Linked across censuses1930 United States Federal Census · St Louis, Missouri
Our Model Tree links this John Kramer across the 1930 and 1940 US Censuses in St Louis, Missouri (XGBoost, ~Confirmed) — first a son (b.~1915), then head of a 13-person household.
Age 15
b. ~1915
Male
Son
Born: Missouri
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | St Louis, Missouri |
| Surname | Kramer |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Germany |
| Mother's Birthplace | Missouri |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | University City |
| Est. Birth Year | ~1915 |
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.
13 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Gertrude Kramer | Daughter | — | 10 | ~1920 |
| Marie Kramer | Daughter | — | 23 | ~1907 |
| Anna Kramer | Daughter | — | 17 | ~1913 |
| Agnes Kramer | Daughter | — | 21 | ~1909 |
| Jacob Kramer | Head | — | 60 | ~1870 |
| Mary Kramer | Other | — | 52 | ~1878 |
| Edmond Rupfer | Other | — | 25 | ~1905 |
| Dorothy Kramer | Other | — | 1 | ~1929 |
| Marie Kramer | Other | — | 22 | ~1908 |
| William Kramer | Other | — | 2 | ~1928 |
| Joseph Kramer | Son | — | 26 | ~1904 |
| John Kramer | Son | — | 15 | ~1915 |
| William Kramer | Son | — | 25 | ~1905 |
Census Appearances
1930
St Louis, …
Son, age 15
St Louis, Missouri · implied b. ~1915 — 13 household members
| Surname | Kramer |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Germany |
| Mother's Birthplace | Missouri |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Louis-County, Missouri
Son, age 25
St.-Louis-County, Missouri · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kremer |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | University City |
| 1935 Residence (County) | St. Louis |
| Occupation | Laborer |
| Industry | Landscape gardener |
| Class of Worker | PW |
| Hours Worked | 39 |
| Income (1939) | 540 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 John Kramer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Kramer
Son · 1930 · age 15 · b. ~1915 · Missouri
★ You are viewing this record
Sibling
Agnes Kramer
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Kramer
Sibling · 1930 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Kramer
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Kramer
Sibling · 1930 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Kramer
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Kramer
Sibling · 1930 · age 25
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 — St Louis, Missouri
Open full size
1930 US Federal Census — St Louis, Missouri
Page Contents
50 people indexed on this census page (ia:1930:missouricensus00reel1224:1141)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Jacob Kramer | 60 | Head | Laborer | Germany |
| 52 | Mary Kramer | 52 | Wife-H | — | Missouri |
| 53 | Joseph Kramer | 26 | Son | Laborer | Missouri |
| 54 | Marie Kramer | 23 | Daughter | Maid | Missouri |
| 55 | Agnes Kramer | 21 | Daughter | Laundress | Missouri |
| 56 | Anna Kramer | 17 | Daughter | Laundress | Missouri |
| 57 | John Kramer THIS PERSON | 15 | Son | — | Missouri |
| 58 | Gertrude Kramer | 10 | Daughter | — | Missouri |
| 59 | William Kramer | 25 | Son | Chauffeur | Missouri |
| 60 | Marie Kramer | 22 | Daughter-in-law | — | Missouri |
| 61 | William Jr. Kramer | 2 | Grandson | — | Missouri |
| 62 | Dorothy Kramer | 1 | Granddaughter | — | Missouri |
| 63 | Edmond Rupfer | 25 | Lodger | Laborer | Germany |
| 64 | John G. Todre | 52 | Head | Patrolman | Denmark |
| 65 | Mary Todre | 42 | Wife-H | — | Missouri |
| 66 | Grace Todre | 21 | Daughter | Clerk | Missouri |
| 67 | Ruth Todre | 19 | Daughter | Maid | Missouri |
| 68 | Helen Todre | 18 | Daughter | — | Missouri |
| 69 | Francis Todre | 16 | Son | — | Missouri |
| 70 | Dale Todre | 13 | Son | — | Missouri |
| 71 | Theodore Darkling | 20 | Lodger | Laborer | Missouri |
| 72 | William Homeyer | 60 | Head | Laborer | Germany |
| 73 | Tillie Homeyer | 55 | Wife-H | — | Missouri |
| 74 | Lillian Homeyer | 30 | Daughter | Stenographer | Missouri |
| 75 | John A. Castulik | 42 | Head | Caretaker | Czechoslovakia |
| 76 | Josephine Castulik | 39 | Wife-H | — | Czechoslovakia |
| 77 | Joseph Castulik | 18 | Son | — | Missouri |
| 78 | Francis Castulik | 17 | Daughter | — | Missouri |
| 79 | Mary Castulik | 15 | Daughter | — | Missouri |
| 80 | Agnes Castulik | 13 | Daughter | — | Missouri |
| 81 | Martha Castulik | 11 | Daughter | — | Missouri |
| 82 | Rita Castulik | 10 | Daughter | — | Missouri |
| 83 | John J. Castulik | 6 | Son | — | Missouri |
| 84 | Helen Castulik | 4 | Daughter | — | Missouri |
| 85 | Dolores Castulik | 1 | Daughter | — | Missouri |
| 86 | John C. Dolan | 46 | Head | Manager | Ohio |
| 87 | Winifred Dolan | 38 | Wife-H | — | Illinois |
| 88 | Frances Dolan | 14 | Daughter | — | Missouri |
| 89 | Patricia Dolan | 12 | Daughter | — | Missouri |
| 90 | Thomas Dolan | 9 | Son | — | Missouri |
| 91 | Charles Dolan | 6 | Son | — | Missouri |
| 92 | Robert Dolan | 3 | Son | — | Missouri |
| 93 | Daniel Dolan | 1 | Son | — | Missouri |
| 94 | C. A. Trutenburg | 63 | Head | — | Missouri |
| 95 | Emma Trutenburg | 67 | Wife-H | — | Missouri |
| 96 | C. A. Jr. Trutenburg | 44 | Son | Machinist | Missouri |
| 97 | Robert P. Gaertner | 34 | Head | Mechanic | California |
| 98 | Sidonie Gaertner | 21 | Wife-H | — | Missouri |
| 99 | Harold Holiday | 30 | Head | Carpenter | Illinois |
| 100 | Frances Holiday | 25 | Wife-H | — | Missouri |
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)