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William Flynn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Louis-County, Missouri
Our Model Tree links this William Flynn across the 1930 and 1940 US Censuses in St.-Louis-County, Missouri (XGBoost, ~Confirmed) — first a son (b.~1917), then head of a 9-person household.
Age 23
b. ~1917
Male
Son
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-County, Missouri |
| Surname | Flynn |
| Given Name | William T. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | St Louis |
| 1935 Residence (County) | City |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | C-4 |
| 1935 Residence | Missouri |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | Ladue City |
| Est. Birth Year | ~1917 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Catherine Flynn | Daughter | — | 21 | ~1919 |
| William Flynn | Head | — | 63 | ~1877 |
| William Flynn | Son | — | 23 | ~1917 |
| Edmund Flynn | Son | — | 30 | ~1910 |
| Robert Flynn | Son | — | 19 | ~1921 |
| John Flynn | Son | — | 15 | ~1925 |
| James Flynn | Son | — | 21 | ~1919 |
| Joseph Flynn | Son | — | 17 | ~1923 |
| Olympia Flynn | Spouse | — | 58 | ~1882 |
Census Appearances
1930
St Louis, …
Son, age 12
St Louis, Missouri · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Flynn |
| Given Name | William J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| 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 23
St.-Louis-County, Missouri · implied b. ~1917 — 9 household members
| Surname | Flynn |
| Given Name | William T. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | St Louis |
| 1935 Residence (County) | City |
| Income (1939) | 0 |
| Highest Grade | C-4 |
| 1935 Residence | Missouri |
| 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 William Flynn across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Flynn
Son · 1940 · age 23 · b. ~1917 · Missouri
★ You are viewing this record
Sibling
Catherine Flynn
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Flynn
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Flynn
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Flynn
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Flynn
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edmund Flynn
Sibling · 1940 · age 30
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.-Louis-County, Missouri
Open full size
1940 US Federal Census — St.-Louis-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02148-00318)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary K. Gibson | 56 | Head | Sales Woman | Pennsylvania |
| 42 | Elizabeth Gibson | 53 | Sister | — | Pennsylvania |
| 43 | Katherine Baber | 47 | Sister | — | Missouri |
| 44 | Richard Gibson | 35 | Brother | Salesman | Missouri |
| 45 | Betty Baber | 17 | Niece | — | Missouri |
| 46 | William T. Flynn | 63 | Head | Jobber | Canada-English |
| 47 | Olympia Flynn | 58 | Wife | — | Missouri |
| 48 | Edmund J. Flynn | 30 | Son | Tile Setter | Missouri |
| 49 | William T. Flynn THIS PERSON | 23 | Son | — | Missouri |
| 50 | Catherine M. Flynn | 21 | Daughter | — | Missouri |
| 51 | James E. Flynn | 21 | Son | Attendant | Missouri |
| 52 | Robert F. Flynn | 19 | Son | — | Missouri |
| 53 | Joseph O. Flynn | 17 | Son | — | Missouri |
| 54 | John D. Flynn | 15 | Son | — | Missouri |
| 55 | Rose Schnarr | 51 | Head | Proprietor | Germany |
| 56 | Dorothy Schnarr | 25 | Daughter | Stenographer | Missouri |
| 57 | Edgar Schnarr | 22 | Son | Clerk | Missouri |
| 58 | Wilbur Schnarr | 17 | Son | — | Missouri |
| 59 | Bernice Schnarr | 16 | Daughter | Clerk | Missouri |
| 60 | Donia Jessett | 50 | Servant | Servant | Missouri |
| 61 | Eugene Brandt | 46 | Head | Salesman | Missouri |
| 62 | Dorothy Brandt | 42 | Wife | — | Missouri |
| 63 | Rex Brandt | 22 | Son | Machinist | Missouri |
| 64 | Edward L. Dwyer | 38 | Head | Chauffeur | Missouri |
| 65 | Matilda D. Dwyer | 37 | Wife | — | England |
| 66 | Barbara M. Dwyer | 17 | Daughter | — | Missouri |
| 67 | Marilyn D. Dwyer | 13 | Daughter | — | Missouri |
| 68 | Edward L. Jr. Dwyer | 11 | Son | — | Missouri |
| 69 | Richard Fisher | 54 | Head | Caretaker | Missouri |
| 70 | Lydia Fisher | 48 | Wife | — | Missouri |
| 71 | Richard D. Fisher | 25 | Son | Accounting Clerk | Missouri |
| 72 | George W. Seiler | 48 | Head | Maintenance | Missouri |
| 73 | Ella Seiler | 39 | Wife | — | Illinois |
| 74 | George Jr. Seiler | 14 | Son | — | Missouri |
| 75 | Ella May Seiler | 12 | Daughter | — | Missouri |
| 76 | Harriet Seiler | 5 | Daughter | — | Missouri |
| 77 | Julia Seiler | 72 | Mother | — | Missouri |
| 78 | Robert F. Peterson | 70 | Father-in-law | Salesman | Illinois |
| 79 | Ralph Graham | 29 | Head | Lawyer | Colorado |
| 80 | Jessie Graham | 29 | Wife | Manager Owner | Missouri |
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)