MC
Margaret Cox — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Margaret Cox across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 10-person household.
Age 15
b. ~1925
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Cox |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston |
| Est. Birth Year | ~1925 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| John Cox | Son | — | 9 | ~1931 |
| Virginia Cox | Daughter | — | 4 | ~1936 |
| Patricia Cox | Daughter | — | 1 | ~1939 |
| Veronica Cox | Daughter | — | 13 | ~1927 |
| Mary Cox | Daughter | — | 19 | ~1921 |
| Irene Cox | Daughter | — | 19 | ~1921 |
| Margaret Cox | Daughter | — | 15 | ~1925 |
| James Cox | Head | — | 45 | ~1895 |
| James Cox | Son | — | 11 | ~1929 |
| Nora Cox | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 6
Suffolk, Massachusetts · implied b. ~1924 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 15
Suffolk-County, Massachusetts · implied b. ~1925 — 10 household members
| Surname | Cox |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Highest Grade | H-1 |
| 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 Margaret Cox across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Margaret Cox
Daughter · 1940 · age 15 · b. ~1925 · Massachusetts
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Sibling
James Cox
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Veronica Cox
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Cox
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Irene Cox
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Cox
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Cox
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Cox
Sibling · 1940 · age 9
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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01666-00508)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edmund Pantalone | 30 | Head | Stain Maker | Massachusetts |
| 2 | Josephine Pantalone | 27 | Wife | — | Massachusetts |
| 3 | Pasquale Ciardiello | 32 | Head | Barber | Brazil |
| 4 | Madeline Ciardiello | 28 | Wife | — | Massachusetts |
| 5 | Pauline Ciardiello | 5 | Daughter | — | Massachusetts |
| 6 | Norma Ciardiello | 2 | Daughter | — | Massachusetts |
| 7 | Charles Avey | 37 | Brother | Manager | Massachusetts |
| 8 | Mabel Avey | 35 | Sister | — | Massachusetts |
| 9 | Ethel Shea | 53 | Head | — | Massachusetts |
| 10 | Edward Shea | 21 | Son | Shipping Clerk | Massachusetts |
| 11 | James Kagan | 43 | Head | Engineer #3 | Massachusetts |
| 12 | Elizabeth Kagan | 44 | Wife | — | Eire |
| 13 | Mary Kagan | 18 | Daughter | — | Massachusetts |
| 14 | James Jr. Kagan | 17 | Son | — | Massachusetts |
| 15 | Elizabeth R. Kagan | 15 | Daughter | — | Massachusetts |
| 16 | William Kagan | 13 | Son | — | Massachusetts |
| 17 | Francis Kagan | 12 | Son | — | Massachusetts |
| 18 | Patricia Kagan | 10 | Daughter | — | Massachusetts |
| 19 | Helen Mcneil | 47 | Sister | Seamstress | Eire |
| 20 | James Cox | 45 | Head | — | Eire |
| 21 | Nora Cox | 40 | Wife | — | Eire |
| 22 | Mary Cox | 19 | Daughter | — | Massachusetts |
| 23 | Irene Cox | 19 | Daughter | — | Massachusetts |
| 24 | Margaret Cox THIS PERSON | 15 | Daughter | — | Massachusetts |
| 25 | Veronica Cox | 13 | Daughter | — | Massachusetts |
| 26 | James Cox | 11 | Son | — | Massachusetts |
| 27 | John Cox | 9 | Son | — | Massachusetts |
| 28 | Virginia Cox | 4 | Daughter | — | Massachusetts |
| 29 | Patricia Cox | 1 | Daughter | — | Massachusetts |
| 30 | Joseph Peky | 36 | Head | Roofer | Massachusetts |
| 31 | Marion Peky | 35 | Wife | — | Massachusetts |
| 32 | Thomas Peky | 17 | Son | — | Massachusetts |
| 33 | Margaret Peky | 13 | Daughter | — | Massachusetts |
| 34 | Robert Peky | 11 | Son | — | Massachusetts |
| 35 | Henry Bertocchi | 40 | Head | Chauffeur | Massachusetts |
| 36 | Sadie Bertocchi | 35 | Wife | — | Massachusetts |
| 37 | Joan Bertocchi | 10 | Daughter | — | Massachusetts |
| 38 | Paul Bertocchi | 8 | Son | — | Massachusetts |
| 39 | Peter O'Rourke | 58 | Head | Storekeeping | Massachusetts |
| 40 | Sarah O'Rourke | 63 | Wife | — | Eire |
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)