WS
William Shannon — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this William Shannon across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents James & Patrick — first a son (b.~1908), then head of a 4-person household.
Age 32
b. ~1908
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Shannon |
| Given Name | William L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville (city) |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | House Painter |
| Industry | General Contracting |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 624 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Painter |
| Township / Ward | Somerville City |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Florence Shannon | Daughter | — | 39 | ~1901 |
| Mary Shannon | Head | — | 67 | ~1873 |
| William Shannon | Son | — | 32 | ~1908 |
| Evelyn Shannon | Daughter | — | 26 | ~1914 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 12
Middlesex, Massachusetts · implied b. ~1908 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shannon |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 22
Middlesex, Massachusetts · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shannon |
| Given Name | William L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Messenger |
| Industry | Telegraph Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 32
Middlesex-County, Massachusetts · implied b. ~1908 — 4 household members
| Surname | Shannon |
| Given Name | William L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville (city) |
| 1935 Residence (County) | Middlesex |
| Occupation | House Painter |
| Industry | General Contracting |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 624 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| 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 William Shannon across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Shannon (~0.92 confidence) and father Patrick Shannon (~0.92 confidence) and mother Mary Shannon (~0.92 confidence) and mother Mary Shannon (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Shannon
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Patrick Shannon
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Mary Shannon
b. ~1873
Source mother
● Household
· direct · ~0.92
Mother
Mary Shannon
b. ~1873
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Shannon
Son · 1940 · age 32 · b. ~1908 · Massachusetts
★ You are viewing this record
Sibling
Evelyn Shannon
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Shannon
Sibling · 1940 · age 39
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-t0627-01705-00638)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ethel M. Fox | 43 | Wife | Shipping Clerk | New York |
| 2 | Fred L. Jr. Fox | 20 | Son | Truck Driver | Massachusetts |
| 3 | Robert E. Fox | 18 | Son | — | Massachusetts |
| 4 | Arthur E. Fox | 16 | Son | — | Massachusetts |
| 5 | Richard M. Fox | 14 | Son | — | Massachusetts |
| 6 | Arthur E. Fox | 52 | Brother | Registered Pharmacist | Massachusetts |
| 7 | Primo Gugolini | 59 | Head | Cook | Italy |
| 8 | Celeste Gugolini | 59 | Wife | — | Italy |
| 9 | Lawrence J. Gugolini | 31 | Son | Sub Sergeant | Massachusetts |
| 10 | Margaret G. Gugolini | 26 | Daughter | Advertising Artist | Massachusetts |
| 11 | Alfred J. Gugolini | 24 | Son | Machinist Apprentice | Massachusetts |
| 12 | Eleanor C. Gugolini | 22 | Daughter | Packer | Massachusetts |
| 13 | Edward L. Gugolini | 18 | Son | — | Massachusetts |
| 14 | Nicholas Morris | 82 | Head | — | Germany |
| 15 | Helen O. Morris | 82 | Wife | — | Germany |
| 16 | Frederick Benoit | 48 | Head | Millwright | English Canada |
| 17 | Emily D. G. Benoit | 38 | Wife | — | English Canada |
| 18 | Veronica Benoit | 16 | Daughter | — | Massachusetts |
| 19 | Alice M. Benoit | 15 | Daughter | — | Massachusetts |
| 20 | Theresa C. Benoit | 14 | Daughter | — | Massachusetts |
| 21 | Bertha G. Benoit | 12 | Daughter | — | Massachusetts |
| 22 | Joseph F. Benoit | 10 | Son | — | Massachusetts |
| 23 | Annie F. Benoit | 9 | Daughter | — | Massachusetts |
| 24 | Marcella M. Benoit | 7 | Daughter | — | Massachusetts |
| 25 | Mary F. O. Shannon | 67 | Head | — | Massachusetts |
| 26 | William L. Shannon THIS PERSON | 32 | Son | House Painter | Massachusetts |
| 27 | Evelyn T. Shannon | 26 | Daughter | Helper | Massachusetts |
| 28 | Florence M. Shannon | 39 | Daughter | Laundress | Massachusetts |
| 29 | William C. Thompson | 41 | Head | Asst. Supt. | Massachusetts |
| 30 | Louise M. Thompson | 41 | Wife | — | Massachusetts |
| 31 | William C. Jr. Thompson | 19 | Son | Truck Driver | Massachusetts |
| 32 | Alice A. Thompson | 18 | Daughter | Clerical Office | Massachusetts |
| 33 | Louis E. Thompson | 17 | Daughter | — | Massachusetts |
| 34 | Doris Thompson | 11 | Daughter | — | Massachusetts |
| 35 | Shelton King | 44 | Head | Pullman Porter | Florida |
| 36 | Dorothy King | 40 | Wife | — | England |
| 37 | David P. G. Jones | 65 | Head | Pullman Porter | Alabama |
| 38 | Dora C. Jones | 61 | Wife | — | English Canada |
| 39 | David W. Ab. Jones | 21 | Son | Bell Hop | Massachusetts |
| 40 | Jean R. Jones | 20 | Daughter | Helper | Massachusetts |
Pedigree Summary
William + 2 siblings
Gen 1 · 4 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)