CW
Charles Williamson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Charles Williamson across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 7-person household.
Age 12
b. ~1928
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Williamson |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1928 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Charles | Age | Birth yr |
|---|---|---|---|---|
| Mabel Williamson | Head | — | 48 | ~1892 |
| Evelyn Williamson | Daughter | — | 16 | ~1924 |
| Frank Williamson | Son | — | 17 | ~1923 |
| Charles Williamson | Son | — | 12 | ~1928 |
| Florence Williamson | Daughter | — | 7 | ~1933 |
| John Williamson | Son | — | 15 | ~1925 |
| Mabel Williamson | Daughter | — | 9 | ~1931 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 2
Middlesex, Massachusetts · implied b. ~1928 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williamson |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 12
Middlesex-County, Massachusetts · implied b. ~1928 — 7 household members
| Surname | Williamson |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 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 Charles Williamson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Charles Williamson
Son · 1940 · age 12 · b. ~1928 · Massachusetts
★ You are viewing this record
Sibling
John Williamson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mabel Williamson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Evelyn Williamson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Williamson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Williamson
Sibling · 1940 · age 7
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-t0627-01702-00651)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Catherine B Murphy | 36 | Wife | — | Massachusetts |
| 42 | Dorothy Murphy | 16 | Daughter | — | Massachusetts |
| 43 | Alice Murphy | 14 | Daughter | — | Massachusetts |
| 44 | Joseph Murphy | 10 | Son | — | Massachusetts |
| 45 | James Murphy | 1 | Son | — | Massachusetts |
| 46 | Mabel Williamson | 48 | Head | — | Massachusetts |
| 47 | Frank Williamson | 17 | Son | Truck Driver | Massachusetts |
| 48 | Evelyn Williamson | 16 | Daughter | — | Massachusetts |
| 49 | John Williamson | 15 | Son | — | Massachusetts |
| 50 | Charles Williamson THIS PERSON | 12 | Son | — | Massachusetts |
| 51 | Mabel Williamson | 9 | Daughter | — | Massachusetts |
| 52 | Florence Williamson | 7 | Daughter | — | Massachusetts |
| 53 | Harold Lemmon | 43 | Head | Laborer | Canada-English |
| 54 | Gertrude Lemmon | 35 | Wife | Elevator Operator | Vermont |
| 55 | Harold Jr Lemmon | 14 | Son | — | Canada-English |
| 56 | Margaret Sullivan | 51 | Head | — | Eire |
| 57 | Anna Sullivan | 51 | Daughter | Pomp Maker | Massachusetts |
| 58 | Isabel A Borgess | 60 | Head | — | Newfoundland |
| 59 | Ruth Borgess | 33 | Daughter | — | Massachusetts |
| 60 | James Borgess | 43 | Son | Carpenter | Massachusetts |
| 61 | Daniel Donovan | 68 | Head | Yard Man | Eire |
| 62 | Julia Donovan | 67 | Wife | — | Eire |
| 63 | Timothy P J Donovan | 34 | Son | Asst Supervisor | Massachusetts |
| 64 | Catherine A Donovan | 30 | Daughter | Office Clerk | Massachusetts |
| 65 | John J Donovan | 27 | Son | Head Shipping Clerk | Massachusetts |
| 66 | Michael A Donovan | 25 | Son | Water Meter Reader | Massachusetts |
| 67 | Anthony Macone | 46 | Head | Meat Cutter | Italy |
| 68 | Mary Macone | 24 | Wife | — | Massachusetts |
| 69 | John Macone | 5 | Son | — | Massachusetts |
| 70 | Anthony Belaire | 28 | Head | Finisher | Massachusetts |
| 71 | Evelyn Belaire | 29 | Wife | Rubber Worker | Massachusetts |
| 72 | Mary E Brady | 65 | Head | — | Canada-English |
| 73 | Mary C Brady | 32 | Daughter | Teacher | Massachusetts |
| 74 | Francis J Brady | 18 | Son | — | Massachusetts |
| 75 | Edward Heline | 45 | Lodger | Blacksmith | Massachusetts |
| 76 | Garrett B Crotty | 64 | Head | Attendant | Eire |
| 77 | Nellie Crotty | 48 | Wife | — | Eire |
| 78 | George R Crotty | 21 | Son | Laborer | Massachusetts |
| 79 | James Crotty | 19 | Son | New Worker | Massachusetts |
| 80 | Dorothy Crotty | 16 | Daughter | — | Massachusetts |
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)