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John Mckenna — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Clair-County, Illinois
Our Model Tree links this John Mckenna across the 1930 and 1940 US Censuses in St.-Clair-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1918), then head of a 9-person household.
Age 22
b. ~1918
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Illinois |
| Surname | McKenna |
| Given Name | John H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St. Clair |
| Additional Details | |
| Occupation | Laborer |
| Industry | Railroad Equip |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 960 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Laborer |
| Township / Ward | East St Louis |
| Est. Birth Year | ~1918 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Alice Walsh | Daughter | — | 58 | ~1882 |
| Bridget Walsh | Head | — | 83 | ~1857 |
| George Mckenna | Other | — | 57 | ~1883 |
| Robert Mckenna | Son | — | 20 | ~1920 |
| John Mckenna | Son | — | 22 | ~1918 |
| James Mckenna | Son | — | 13 | ~1927 |
| Thomas Walsh | Son | — | 47 | ~1893 |
| Richard Mckenna | Son | — | 17 | ~1923 |
| Stasia Mckenna | Spouse | — | 45 | ~1895 |
Census Appearances
1930
St Clair, …
Son, age 12
St Clair, Illinois · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McKenna |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
St.-Clair-County, Illinois
Son, age 22
St.-Clair-County, Illinois · implied b. ~1918 — 9 household members
| Surname | McKenna |
| Given Name | John H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St. Clair |
| Occupation | Laborer |
| Industry | Railroad Equip |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 960 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Mckenna across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mckenna
Son · 1940 · age 22 · b. ~1918 · Illinois
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Sibling
James Mckenna
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mckenna
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Mckenna
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Walsh
Sibling · 1940 · age 58
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Walsh
Sibling · 1940 · age 47
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
1940 US Federal Census — St.-Clair-County, Illinois
Open full size
1940 US Federal Census — St.-Clair-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00880-00435)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | George Scott | 23 | Head | Laborer | Alabama |
| 42 | Ruby C Scott | 18 | Wife | — | Illinois |
| 43 | Joyce Jean Scott | 0 | Daughter | — | Illinois |
| 44 | Fred Kissing | 76 | Head | President | Missouri |
| 45 | Anna K Kissing | 69 | Wife | — | Illinois |
| 46 | Harry J Clanahan | 46 | Head | Broker | Missouri |
| 47 | Molly Clanahan | 33 | Wife | — | Bosnia |
| 48 | George H Davis | 35 | Head | Contractor | Tennessee |
| 49 | Marjorie E Davis | 38 | Wife | — | Arkansas |
| 50 | George E Davis | 4 | Son | — | Illinois |
| 51 | Richard A Davis | 3 | Son | — | Illinois |
| 52 | George C Miller | 79 | Father-in-law | Laborer | Arkansas |
| 53 | Clarence C Riggs | 42 | Head | Printer | Missouri |
| 54 | Eugenia M Riggs | 26 | Wife | — | Arkansas |
| 55 | Dudley P Riggs | 20 | Son | Carrier Helper | Missouri |
| 56 | Leeman R Riggs | 19 | Son | — | Missouri |
| 57 | Vernon R Riggs | 15 | Son | — | Missouri |
| 58 | George R Riggs | 7 | Son | — | Illinois |
| 59 | Harrison L Kollme | 51 | Head | Druggist | Illinois |
| 60 | Bessie C Kollme | 47 | Wife | Clerk | Illinois |
| 61 | Ruth L Kollme | 22 | Daughter | Sales Clerk | Illinois |
| 62 | Raymond R Scoggins | 44 | Head | Salesman | Illinois |
| 63 | Winnie C Scoggins | 45 | Wife | — | Illinois |
| 64 | Glady J Scoggins | 23 | Daughter | Cook | Illinois |
| 65 | Paul R Scoggins | 13 | Son | — | Illinois |
| 66 | Billie M Scoggins | 11 | Son | — | Illinois |
| 67 | Adam F Baron | 71 | Head | Salesman | Illinois |
| 68 | Margaret C Baron | 27 | Wife | — | Illinois |
| 69 | Bridget Walsh | 83 | Head | — | Irish Free State |
| 70 | Alice C Walsh | 58 | Daughter | — | Illinois |
| 71 | Thomas L Walsh | 47 | Son | Steam Fitter Helper | Illinois |
| 72 | George H Mckenna | 57 | Son-in-law | Blacksmith | Missouri |
| 73 | Stasia Mckenna | 45 | Wife | — | Illinois |
| 74 | John H Mckenna THIS PERSON | 22 | Son | Laborer | Illinois |
| 75 | Robert E Mckenna | 20 | Son | Private | Illinois |
| 76 | Richard F Mckenna | 17 | Son | — | Illinois |
| 77 | James M Mckenna | 13 | Son | — | Illinois |
| 78 | Leslie J Egbert | 43 | Head | Painter + Decorator | Illinois |
| 79 | Glena O Egbert | 39 | Wife | — | Illinois |
| 80 | James W Egbert | 19 | Son | File Clerk | Illinois |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)