JL
John Leach — 1930 US Census Record
Linked across censuses1930 United States Federal Census · St Louis, Missouri
Our Model Tree links this John Leach across the 1930 and 1940 US Censuses in St Louis, Missouri (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 6-person household.
Age 1
b. ~1929
Male
Son
Born: Missouri
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | St Louis, Missouri |
| Surname | Leach |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Additional Details | |
| Occupation | none |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | Saint Louis City |
| Est. Birth Year | ~1929 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Leach | Son | — | 1 | ~1929 |
| Robert Leach | Head | — | 32 | ~1898 |
| Elizabeth Leach | Daughter | — | 5 | ~1925 |
| Joyce Leach | Daughter | — | ~1930 | |
| Emma Leach | Spouse | — | 24 | ~1906 |
| Robert Leach | Son | — | 3 | ~1927 |
Census Appearances
1930
St Louis, …
Son, age 1
St Louis, Missouri · implied b. ~1929 — 6 household members
| Surname | Leach |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Louis-City-County, Missouri
Other, age 11
St.-Louis-City-County, Missouri · implied b. ~1929 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leech |
| Given Name | John |
| Relationship to Head | Step-son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | St. Louis (City) |
| 1935 Residence (County) | St. Louis City |
| Occupation | 0 |
| Class of Worker | 0 |
| Highest Grade | No 5 |
| 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 Leach across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Leach
Son · 1930 · age 1 · b. ~1929 · Missouri
★ You are viewing this record
Sibling
Joyce Leach
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Leach
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Leach
Sibling · 1930 · age 3
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:missouricensus00reel1229:1132)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Harvey Dale | 5 | Son | — | Illinois |
| 52 | Roscoe Dale | 3 | Son | — | Illinois |
| 53 | Robert Leach | 32 | Head | Laborer | Missouri |
| 54 | Emma Leach | 24 | Wife | None | Oklahoma |
| 55 | Elizabeth Leach | 5 | Daughter | None | Missouri |
| 56 | Robert Jr. Leach | 3 | Son | None | Missouri |
| 57 | John Leach THIS PERSON | 1 | Son | None | Missouri |
| 58 | Joyce Leach | 0 | Daughter | None | Missouri |
| 59 | Henry J. Semper | 29 | Head | Laborer | Missouri |
| 60 | Norma Semper | 22 | Wife | None | Missouri |
| 61 | Hazel Semper | 4 | Daughter | None | Missouri |
| 62 | George Semper | 2 | Son | None | Missouri |
| 63 | Gerald Semper | 1 | Son | None | Missouri |
| 64 | Henrietta Semper | 0 | Daughter | None | Missouri |
| 65 | Helen Besunick | 44 | Head | Housekeeper | Missouri |
| 66 | Stillwell Besunick | 26 | Daughter | Milliner | Missouri |
| 67 | Wilson Besunick | 11 | Gr. Son | None | Missouri |
| 68 | Ramsey Besunick | 30 | Lodger | Truckdriver | Missouri |
| 69 | Douglas Turner | 31 | Head | Truckdriver | Missouri |
| 70 | Minnie Turner | 26 | Wife | None | Missouri |
| 71 | Leo Turner | 11 | Son | None | Missouri |
| 72 | Louis Turner | 7 | Son | None | Missouri |
| 73 | William Campbell | 47 | Head | Freight Handler | Missouri |
| 74 | Fanny Campbell | 36 | Wife | None | Missouri |
| 75 | Walter Campbell | 25 | Son | Laborer | Missouri |
| 76 | James Campbell | 22 | Son | Freight Handler | Missouri |
| 77 | Le Roy Campbell | 21 | Son | Helper | Missouri |
| 78 | Rose Campbell | 12 | Daughter | None | Missouri |
| 79 | Ray Campbell | 3 | Gr. Son | None | Missouri |
| 80 | John Kennedy | 40 | Head | Engineer | Illinois |
| 81 | Bertha Kennedy | 37 | Wife | None | Illinois |
| 82 | Frank Kajchala | 55 | Head | Engineer | Czechoslovakia |
| 83 | Mary Kajchala | 55 | Wife | None | Czechoslovakia |
| 84 | Michael Kajchala | 29 | Son | Bookpressman | Missouri |
| 85 | Andrew Kajchala | 27 | Son | Cabinetmaker | Missouri |
| 86 | Josef Kajchala | 19 | Son | Valve Turner | Missouri |
| 87 | Frank Kajchala | 16 | Son | None | Missouri |
| 88 | Thomas Mcdermott | 27 | Head | Chauffeur | Missouri |
| 89 | Anna Mcdermott | 22 | Wife | None | Missouri |
| 90 | Thomas Jr. Mcdermott | 1 | Son | None | Missouri |
| 91 | John Lauterbach | 67 | Head | Carpenter | Bavaria Germany |
| 92 | Katie Lauterbach | 65 | Wife | None | Germany |
| 93 | William Robertson | 56 | Head | Nightwatchman | Missouri |
| 94 | Cisey Robertson | 66 | Wife | None | Germany |
| 95 | Edward Davis | 21 | Head | Laborer | Missouri |
| 96 | Andrew Davis | 19 | Housekeeper | Housekeeper | Missouri |
| 97 | William Weger | 28 | Head | Laborer | Missouri |
| 98 | Birdie Weger | 26 | Wife | None | Missouri |
| 99 | Rose Weger | 2 | Daughter | None | Missouri |
| 100 | Carlo Longobardi | 46 | Head | Cigarmaker | Italy |
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)