TF
Thomas Flynn — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Thomas Flynn across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Thomas & Sara — first a son (b.~1918), then head of a 6-person household.
Age 22
b. ~1918
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Flynn |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | General Work |
| Class of Worker | PW |
| Hours Worked | 60 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | General Work |
| Township / Ward | Lowell City |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Thomas Flynn | Head | — | 62 | ~1878 |
| Annie Flynn | Other | — | 62 | ~1878 |
| Dorothy Flynn | Son | — | 19 | ~1921 |
| William Flynn | Son | — | 28 | ~1912 |
| Thomas Flynn | Son | — | 22 | ~1918 |
| Sara Flynn | Spouse | — | 59 | ~1881 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 2
Middlesex, Massachusetts · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Flynn |
| Given Name | Thomas A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 12
Middlesex, Massachusetts · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Flynn |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 22
Middlesex-County, Massachusetts · implied b. ~1918 — 6 household members
| Surname | Flynn |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell City |
| 1935 Residence (County) | Middlesex |
| Occupation | General Work |
| Class of Worker | PW |
| Hours Worked | 60 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Thomas Flynn across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Flynn (~0.92 confidence) and mother Sara Flynn (~0.92 confidence) and mother Sarah Flynn (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Flynn
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Sara Flynn
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Sarah Flynn
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Flynn
Son · 1940 · age 22 · b. ~1918 · Massachusetts
★ You are viewing this record
Sibling
Dorothy Flynn
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Flynn
Sibling · 1940 · age 28
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01692-00107)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Keegan | 55 | Head | Deputy | Massachusetts |
| 2 | Katharine Keegan | 51 | Wife | — | Massachusetts |
| 3 | William Jr Keegan | 19 | Son | — | Massachusetts |
| 4 | Gertrude Keegan | 12 | Daughter | — | Massachusetts |
| 5 | Maria Mcdermott | 76 | Head | — | Irish Free State |
| 6 | Harry Mcdermott | 42 | Son | Salesman | Massachusetts |
| 7 | Thomas Flynn | 62 | Head | — | Scotland |
| 8 | Sara Flynn | 59 | Wife | — | Massachusetts |
| 9 | William Flynn | 28 | Son | Driver | Massachusetts |
| 10 | Thomas Flynn THIS PERSON | 22 | Son | General Work | Massachusetts |
| 11 | Dorothy Flynn | 19 | Son | Bookkeeper | Massachusetts |
| 12 | Annie Flynn | 62 | Sister in law | Chambermaid | Massachusetts |
| 13 | Mary Craig | 55 | Head | — | Massachusetts |
| 14 | Mary Craig | 30 | Daughter | Packer | Massachusetts |
| 15 | Fred Craig | 32 | Son | Mail Carrier | Massachusetts |
| 16 | Jennie A Vanston | 76 | Head | — | Massachusetts |
| 17 | Alice Cochrane | 62 | Lodger | — | Massachusetts |
| 18 | Maud Varnum | 54 | Maid | Housework | Massachusetts |
| 19 | Alvin B Roy | 33 | Head | Installer | Massachusetts |
| 20 | Helen Roy | 33 | Wife | — | Massachusetts |
| 21 | Brenda Roy | 7 | Daughter | — | Massachusetts |
| 22 | Richard O'Brien | 60 | Head | — | Vermont |
| 23 | Helen Dowling | 47 | Step sister | Drawer-In | Massachusetts |
| 24 | Elizabeth Dowling | 45 | Step sister | Stitcher | Massachusetts |
| 25 | Mary Dowling | 40 | Step sister | — | Massachusetts |
| 26 | Charles Clements | 40 | Head | Clerk | Maine |
| 27 | Edna Clements | 40 | Wife | — | Maine |
| 28 | Ruth Clements | 18 | Daughter | — | Maine |
| 29 | Cynthia Clements | 16 | Daughter | — | Maine |
| 30 | Dorothy Clements | 14 | Daughter | — | Maine |
| 31 | Martha Clements | 12 | Daughter | — | Maine |
| 32 | Arthur Clements | 6 | Son | — | Massachusetts |
| 33 | Alice Clements | 70 | Mother | — | Maine |
| 34 | Arthur Wardwell | 82 | Father in law | — | Maine |
| 35 | Timothy Finnegan | 48 | Head | Mail Carrier | Massachusetts |
| 36 | Mary Finnegan | 46 | Wife | — | Massachusetts |
| 37 | Daniel Finnegan | 11 | Son | — | Massachusetts |
| 38 | Mary Finnegan | 9 | Daughter | — | Massachusetts |
| 39 | Ellen Finnegan | 8 | Daughter | — | Massachusetts |
| 40 | John T Finnegan | 4 | Son | — | Massachusetts |
Pedigree Summary
Thomas + 2 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)