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William Lynch — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hampden-County, Massachusetts
Our Model Tree links this William Lynch across the 1920, 1930 and 1940 US Censuses in Hampden-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Mary & David — first a son (b.~1908), then head of a 3-person household.
Age 32
b. ~1908
Male
Son
Born: Vermont
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hampden-County, Massachusetts |
| Surname | Lynch |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Vermont |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Hampden |
| Additional Details | |
| Occupation | Laborer |
| Industry | Construction Company |
| Class of Worker | PW |
| Hours Worked | 4 |
| Income (1939) | 500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Vermont |
| Birth Country | United States |
| Birthplace (normalized) | vermont |
| Occupation | Laborer |
| Township / Ward | Springfield |
| Est. Birth Year | ~1908 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Mary Lynch | Head | — | 63 | ~1877 |
| Charles Lynch | Son | — | 36 | ~1904 |
| William Lynch | Son | — | 32 | ~1908 |
Census Appearances
1920
Hampden, Massachusetts
Son, age 18
Hampden, Massachusetts · implied b. ~1902 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Vermont |
| Father's Birthplace | Vermont |
| Mother's Birthplace | New Hampshire |
| Occupation | Truck helper |
| Industry | Motorcycle shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Vermont |
| Birth Country | United States |
| Birthplace (normalized) | vermont |
1930
Hampden, Massachusetts
Son, age 27
Hampden, Massachusetts · implied b. ~1903 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | William P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Vermont |
| Father's Birthplace | Vermont |
| Mother's Birthplace | New Hampshire |
| Occupation | Laborer |
| Industry | Odd Jobs |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Vermont |
| Birth Country | United States |
| Birthplace (normalized) | vermont |
1940
Hampden-County, Massachusetts
Son, age 32
Hampden-County, Massachusetts · implied b. ~1908 — 3 household members
| Surname | Lynch |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Vermont |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Hampden |
| Occupation | Laborer |
| Industry | Construction Company |
| Class of Worker | PW |
| Hours Worked | 4 |
| Income (1939) | 500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Vermont |
| Birth Country | United States |
| Birthplace (normalized) | vermont |
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 Lynch across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mary Lynch (~0.92 confidence) and father David Lynch (~0.92 confidence) and mother Mary Lynch (~0.92 confidence) and father Adelbert Brown (~0.60 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.84
Mother
Mary Lynch
b. ~1877
Source mother
● Household
· direct · ~0.92
Father
David Lynch
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Mary Lynch
b. ~1878
Source mother
● Household
· direct · ~0.92
Father
Adelbert Brown
b. ~1902
Source father
● Household
· direct · ~0.6
This person
Anchor record
William Lynch
Son · 1940 · age 32 · b. ~1908 · Massachusetts
★ You are viewing this record
Sibling
Charles Lynch
Sibling · 1940 · age 36
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 — Hampden-County, Massachusetts
Open full size
1940 US Federal Census — Hampden-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01709-00094)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Carl S. Belden | 40 | Head | Truck Driver | Massachusetts |
| 42 | Laura Belden | 31 | Wife | Waitress | Massachusetts |
| 43 | Corrine Belden | 12 | Daughter | — | Massachusetts |
| 44 | Helma Johnson | 62 | Head | — | Sweden |
| 45 | Walter Johnson | 33 | Son | Machinist | Massachusetts |
| 46 | Margaret Welch | 62 | Head | — | Massachusetts |
| 47 | William Welch | 32 | Son | Chemist | Massachusetts |
| 48 | Charles Welch | 23 | Son | Engineer Inspector | Massachusetts |
| 49 | Selmage Golson | 47 | Head | Attendant | S. Carolina |
| 50 | Beatrice Golson | 43 | Wife | — | Connecticut |
| 51 | Alonzo Green | 39 | Head | Mechanic | S. Carolina |
| 52 | Effie Green | 38 | Wife | Elevator Operator | Alabama |
| 53 | Lucius Green | 20 | Son | Bus Boy | Alabama |
| 54 | Mary Lynch | 63 | Head | — | New Hampshire |
| 55 | Charles Lynch | 36 | Son | Printer | Vermont |
| 56 | William Lynch THIS PERSON | 32 | Son | Laborer | Vermont |
| 57 | Marie Lanere | 39 | Head | Counter Girl | Massachusetts |
| 58 | Edward Troque | 54 | Head | Waiter | Virginia |
| 59 | Minnie Troque | 49 | Wife | Music Teacher | Virginia |
| 60 | Frederick Myers | 36 | Head | Fur Cutter | Connecticut |
| 61 | Isabell Myers | 32 | Wife | — | New York |
| 62 | Frederick Jr. Myers | 10 | Son | — | Massachusetts |
| 63 | Shirley Myers | 7 | Daughter | — | Massachusetts |
| 64 | Josephine Capozza | 59 | Head | — | Italy |
| 65 | Concetta Capozza | 33 | Daughter | Slip Coverer | Massachusetts |
| 66 | Mary Williams | 53 | Head | House Maid | Virginia |
| 67 | Sydney Williams | 25 | Son | Service Man | New York |
| 68 | Nancy Williams | 20 | Daughter-in-law | Hairdresser | Ohio |
| 69 | Thomas Johnston | 40 | Head | Waiter | Virginia |
| 70 | Anita Johnston | 35 | Wife | — | Massachusetts |
| 71 | William Jones | 59 | Head | Dentist | N. Carolina |
| 72 | Zora Jones | 24 | Daughter | Assistant | Massachusetts |
| 73 | Yvonne Jones | 14 | Daughter | — | Massachusetts |
| 74 | Frank Sadowski | 55 | Head | Laborer | Poland |
| 75 | Josephine Sadowski | 48 | Wife | — | Poland |
| 76 | Fannie Sadowski | 27 | Daughter | Bookkeeper | Massachusetts |
| 77 | Joseph Sadowski | 26 | Son | Bartender | Massachusetts |
| 78 | Hattie Sadowski | 25 | Daughter | Hostess | Massachusetts |
| 79 | Stasia Sadowski | 18 | Daughter | New Worker | Massachusetts |
| 80 | Harold Geo Smith | 37 | Head | Line Builder | Massachusetts |
Pedigree Summary
William + 1 sibling
Gen 1 · 4 parents
~0.84
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)