AT
Ada Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Ada Thomas across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1881), then head of a 9-person household.
Age 59
b. ~1881
Female
Spouse
Born: England
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Thomas |
| Given Name | Ada |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Stow town |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
| Township / Ward | Stow Town |
| Est. Birth Year | ~1881 |
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 Ada | Age | Birth yr |
|---|---|---|---|---|
| Lawrence Thomas | Son | — | 1 | ~1939 |
| John Thomas | Head | — | 60 | ~1880 |
| John Thomas | Son | — | 8 | ~1932 |
| Ernest Thomas | Son | — | 10 | ~1930 |
| Ada Thomas | Spouse | — | 59 | ~1881 |
| Helen Thomas | Daughter | — | 4 | ~1936 |
| Blanche Thomas | Spouse | — | 32 | ~1908 |
| Ernest Thomas | Son | — | 30 | ~1910 |
| Phillip Thomas | Son | — | 9 | ~1931 |
Census Appearances
1930
Middlesex, Massachusetts
Other, age 49
Middlesex, Massachusetts · implied b. ~1881 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ada -H |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | First papers filed |
| Year of Immigration | 1922 |
| Age at First Marriage | 26 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Middlesex-County, Massachusetts
Spouse, age 59
Middlesex-County, Massachusetts · implied b. ~1881 — 9 household members
| Surname | Thomas |
| Given Name | Ada |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Stow town |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Hours Worked | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
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 Ada Thomas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Ada Thomas
Spouse · 1940 · age 59 · b. ~1881 · Massachusetts
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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-t0627-01617-00713)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Simnea Trudeau | 30 | Daughter | — | Wyoming |
| 2 | Sauri Katzala | 27 | Head | Truck Driver | Massachusetts |
| 3 | Helen Katzala | 25 | Wife | — | Wyoming |
| 4 | Sauri Katzala | 1 | Son | — | Massachusetts |
| 5 | Charles Santi | 48 | Head | Farmer | Canada French |
| 6 | Josephine Santi | 47 | Wife | — | Finland |
| 7 | Josephine Santi | 16 | Daughter | — | Massachusetts |
| 8 | Harold Hanson | 44 | Head | Attendant | Massachusetts |
| 9 | Edith Hanson | 43 | Wife | — | England |
| 10 | Harold J. Hanson | 19 | Son | Sander | Massachusetts |
| 11 | Alice Hanson | 17 | Daughter | New Worker | Massachusetts |
| 12 | Robert Hanson | 16 | Son | — | Massachusetts |
| 13 | John V. Thomas | 60 | Head | Chipper | England |
| 14 | Ada Thomas THIS PERSON | 59 | Wife | — | England |
| 15 | Ernest Thomas | 30 | Son | Printer | England |
| 16 | Blanche Thomas | 32 | Wife | — | Maine |
| 17 | Ernest Jr. Thomas | 10 | Son | — | Massachusetts |
| 18 | Phillip R. Thomas | 9 | Son | — | Massachusetts |
| 19 | John W. Thomas | 8 | Son | — | Massachusetts |
| 20 | Helen A. Thomas | 4 | Daughter | — | Massachusetts |
| 21 | Lawrence E. Thomas | 1 | Son | — | Pennsylvania |
| 22 | Louis Novick | 57 | Head | Napper | Poland |
| 23 | Walter Novick | 17 | Son | New Worker | Massachusetts |
| 24 | Maude Wise | 38 | Head | — | Massachusetts |
| 25 | Claudia Deane | 30 | Head | Teacher | New York |
| 26 | Lorraine M. Deane | 32 | Wife | — | Massachusetts |
| 27 | Harriet G. Bird | 66 | Head | — | Massachusetts |
| 28 | Charles H. Lund | 54 | Hired man | Farmer | Massachusetts |
| 29 | Herbert H. Cooke | 51 | Head | Gardener | Massachusetts |
| 30 | Skylah Cooke | 53 | Wife | — | Massachusetts |
| 31 | Raymond Phalow | 44 | Head | Carpenter | Massachusetts |
| 32 | Lilla Phalow | 43 | Wife | — | Massachusetts |
| 33 | Arthur Phalow | 22 | Son | Mill Hand | Massachusetts |
| 34 | Edna Phalow | 18 | Daughter | — | Massachusetts |
| 35 | Doris Phalow | 16 | Daughter | — | Massachusetts |
| 36 | Eleanor Phalow | 13 | Daughter | — | Massachusetts |
| 37 | Alice Phalow | 9 | Daughter | — | Massachusetts |
| 38 | Roland Davis | 39 | Head | Meat Cutter | Massachusetts |
| 39 | Gertrude Davis | 34 | Wife | — | Massachusetts |
| 40 | John Maki | 49 | Head | Mill Hand | Finland |
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)