MC
Margaret Cooper — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Margaret Cooper across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents George & George — first a daughter (b.~1919), then head of a 4-person household.
Age 21
b. ~1919
Female
Daughter
Born: England
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Cooper |
| Given Name | Margaret E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | England |
| 1935 Residence (City) | Winchester Town |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | C-2 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
| Township / Ward | Winchester Town |
| Est. Birth Year | ~1919 |
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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| Emily Cooper | Spouse | — | 45 | ~1895 |
| George Cooper | Head | — | 49 | ~1891 |
| Margaret Cooper | Daughter | — | 21 | ~1919 |
| Elizabeth Terry | Other | — | 35 | ~1905 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 1
Middlesex, Massachusetts · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Muriel Emily |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | England |
| Year of Immigration | 1919 |
| Naturalization Status | Alien |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1930
Middlesex, Massachusetts
Daughter, age 11
Middlesex, Massachusetts · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Margaret G. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | England |
| Naturalization Status | Alien |
| Year of Immigration | 1919 |
| 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
Daughter, age 21
Middlesex-County, Massachusetts · implied b. ~1919 — 4 household members
| Surname | Cooper |
| Given Name | Margaret E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | England |
| 1935 Residence (City) | Winchester Town |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | C-2 |
| 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 Margaret Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Cooper (~0.92 confidence) and father George Cooper (~0.92 confidence) and mother Emily Cooper (~0.92 confidence) and father George Cooper (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Cooper
b. ~1891
Source father
● Household
· direct · ~0.92
Father
George Cooper
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Emily Cooper
b. ~1896
Source mother
● Household
· direct · ~0.92
Father
George Cooper
b. ~1899
Source father
● Household
· direct · ~0.92
This person
Anchor record
Margaret Cooper
Daughter · 1940 · age 21 · b. ~1919 · Massachusetts
★ 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 — 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-t0627-01622-00229)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Everett L Vincent | 42 | Head | Salesman | Massachusetts |
| 2 | Gertrude H Vincent | 38 | Wife | — | Massachusetts |
| 3 | Jeanne Vincent | 16 | Daughter | — | Massachusetts |
| 4 | Barbara Vincent | 13 | Daughter | — | Massachusetts |
| 5 | Ellen Vincent | 11 | Son | — | Massachusetts |
| 6 | Sally Vincent | 7 | Daughter | — | Massachusetts |
| 7 | Amy P Wild | 61 | Head | — | Massachusetts |
| 8 | Corinne Dupuy | 35 | Maid | Maid | Canada-French |
| 9 | Charles H Wansker | 40 | Head | Mortgage Broker | New York |
| 10 | Lillian E Wansker | 39 | Wife | — | Massachusetts |
| 11 | Jane Wansker | 15 | Daughter | — | Massachusetts |
| 12 | Barbara Wansker | 13 | Daughter | — | Massachusetts |
| 13 | Charles Wansker | 10 | Son | — | Illinois |
| 14 | Richard Wansker | 9 | Son | — | Illinois |
| 15 | Marjorie Smith | 20 | Maid | Maid | Massachusetts |
| 16 | Edward F Neill | 52 | Head | Broker | New York |
| 17 | Louise C Neill | 52 | Wife | — | Massachusetts |
| 18 | Stanley F Neill | 28 | Son | Salesman | Massachusetts |
| 19 | Willie F Eddlefson | 76 | Head | — | Massachusetts |
| 20 | Almira Eddlefson | 63 | Wife | — | Massachusetts |
| 21 | Bridget Doherty | 33 | Maid | Maid | Irish Free State |
| 22 | George A Sexton | 57 | Head | Co-Owner | Massachusetts |
| 23 | Grace B Sexton | 54 | Wife | — | Massachusetts |
| 24 | George A Jr Sexton | 15 | Son | — | Massachusetts |
| 25 | James Mcmullen | 36 | Chauffeur | Chauffeur | Georgia |
| 26 | Willie Mcmullen | 38 | Cook | Cook | Florida |
| 27 | Addison F Holmes | 57 | Head | Professor | Massachusetts |
| 28 | Grace A Holmes | 56 | Wife | — | Massachusetts |
| 29 | Stella Gunn | 42 | Housekeeper | Housekeeper | Canada-English |
| 30 | Gertrude E Norwood | 56 | Head | Teacher | Massachusetts |
| 31 | Frederick P Young | 69 | Lodger | Collector | Massachusetts |
| 32 | Anna B Young | 63 | Lodger | — | Massachusetts |
| 33 | Harry L Chenelli | 57 | Head | Manufacturer | Massachusetts |
| 34 | Mabel Chenelli | 57 | Wife | — | Massachusetts |
| 35 | Harry H Chenelli | 26 | Son | Clerk | Massachusetts |
| 36 | George E Cooper | 49 | Head | Sales Manager | England |
| 37 | Emily M Cooper | 45 | Wife | — | England |
| 38 | Margaret E Cooper THIS PERSON | 21 | Daughter | — | England |
| 39 | Elizabeth Terry | 35 | Maid | Maid | Scotland |
| 40 | Warren A Maynard | 43 | Head | Traffic Engineer | New Jersey |
Pedigree Summary
Margaret
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)