GT
Grace Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cumberland-County, Maine
Our Model Tree links this Grace Thomas across the 1920, 1930 and 1940 US Censuses in Cumberland-County, Maine (XGBoost, ~Confirmed), with identified parents Alfred & Alfred — first a daughter (b.~1899), then head of a 3-person household.
Age 41
b. ~1899
Female
Daughter
Born: England
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cumberland-County, Maine |
| Surname | Thomas |
| Given Name | Grace V. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Single |
| Birthplace | England |
| 1935 Residence (City) | Portland |
| 1935 Residence (County) | Cumberland |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | England |
| Birthplace (normalized) | england |
| Township / Ward | Portland |
| Est. Birth Year | ~1899 |
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 Grace | Age | Birth yr |
|---|---|---|---|---|
| Caroline Thomas | Spouse | — | 63 | ~1877 |
| Alfred Thomas | Head | — | 64 | ~1876 |
| Grace Thomas | Daughter | — | 41 | ~1899 |
Census Appearances
1920
Cumberland, Maine
Daughter, age 21
Cumberland, Maine · implied b. ~1899 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Grace V. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | England |
| Year of Immigration | 1912 |
| Naturalization Status | First papers filed |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Hairdresser |
| Industry | Hair Shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1930
Cumberland, Maine
Daughter, age 30
Cumberland, Maine · implied b. ~1900 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | England |
| Naturalization Status | Naturalized |
| Year of Immigration | 1910 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Cumberland-County, Maine
Daughter, age 41
Cumberland-County, Maine · implied b. ~1899 — 3 household members
| Surname | Thomas |
| Given Name | Grace V. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Single |
| Birthplace | England |
| 1935 Residence (City) | Portland |
| 1935 Residence (County) | Cumberland |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| 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 Grace Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Alfred Thomas (~0.92 confidence) and father Alfred Thomas (~0.92 confidence) and mother Caroline Thomas (~0.92 confidence) and father Clifford Thomas (~0.92 confidence) and mother Isadora Thomas (~0.92 confidence) and mother Sarah Thomas (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alfred Thomas
b. ~1876
Source father
● Household
· direct · ~0.92
Father
Alfred Thomas
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Caroline Thomas
b. ~1877
Source mother
● Household
· direct · ~0.92
Father
Clifford Thomas
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Isadora Thomas
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Sarah Thomas
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Grace Thomas
Daughter · 1940 · age 41 · b. ~1899 · Maine
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cumberland-County, Maine
Open full size
1940 US Federal Census — Cumberland-County, Maine
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01476-01015)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edna A. Barbour | 44 | Aunt | — | Maine |
| 2 | Alfred H. Thomas | 64 | Head | Plastering Contractor | England |
| 3 | Caroline L. Thomas | 63 | Wife | — | England |
| 4 | Grace V. Thomas THIS PERSON | 41 | Daughter | — | England |
| 5 | Willis M. Mersereau | 56 | Head | Traveling Salesman | Maine |
| 6 | Martha V. Mersereau | 56 | Wife | — | Massachusetts |
| 7 | Ernest V. Monderson | 29 | Head | Truck Driver | Canada-English |
| 8 | Jacquelyn L. Monderson | 28 | Wife | — | Canada-English |
| 9 | Bernice L. Monderson | 5 | Daughter | — | Maine |
| 10 | Ernest L. Monderson | 2 | Son | — | Maine |
| 11 | Jean J. Monderson | 0 | Daughter | — | Maine |
| 12 | Grace G. Crozier | 46 | Head | Housework | Maine |
| 13 | Howard E. Crozier | 19 | Son | Laborer | Maine |
| 14 | Robert H. Crozier | 17 | Son | — | Maine |
| 15 | James B. Crozier | 14 | Son | — | Maine |
| 16 | Phillip S. Crozier | 12 | Son | — | Maine |
| 17 | Norman B. Crozier | 4 | Son | — | Maine |
| 19 | William F. Weymouth | 76 | Head | Painter And Paperhanger | Maine |
| 20 | Helen J. Weymouth | 69 | Wife | — | Maine |
| 21 | Rasmus J. Andersen | 57 | Head | Painter | Denmark |
| 22 | Petra Andersen | 61 | Wife | — | Denmark |
| 23 | Agnes A. Andersen | 30 | Daughter | Clerk | Maine |
| 24 | Archibald Macaloney | 75 | Head | Janitor | Canada-English |
| 25 | Georgia A. Macaloney | 81 | Wife | — | Maine |
| 26 | L. Ellen Young | 40 | Head | Office Mgr. | Maine |
| 27 | John C. Hayles | 38 | Brother | Bus Operator | Maine |
| 28 | Violet R. Hayles | 28 | Sister | Electric Machine Operator | Maine |
| 29 | Frances A. Hayles | 26 | Sister | Hairdresser | Maine |
| 30 | Constance Allen | 77 | Head | — | Massachusetts |
| 31 | Chas. H. Reddy | 68 | Head | Night Watchman | Maine |
| 32 | Emma L. Reddy | 63 | Wife | — | Canada-English |
| 33 | Harry L. Sivovlos | 45 | Head | Supervisor | Maine |
| 34 | Florence S. Meader | 49 | Housekeeper | Housekeeper | Canada-English |
| 35 | Harriett St. Clair | 54 | Head | Elementary Teacher | Maine |
| 36 | Dorothy C. St. Clair | 32 | Daughter | Elementary Teacher | Maine |
| 37 | George H. Long | 64 | Head | Collector | Maine |
| 38 | Jeannie E. Long | 70 | Sister | — | Maine |
| 39 | Jennie P. Petersen | 54 | Head | — | Maine |
| 40 | Arlene V. Petersen | 27 | Daughter | Packer | Maine |
Pedigree Summary
Grace
Gen 1 · 6 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)