RC
Ruth Cook — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Ruth Cook across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1931), then head of a 10-person household.
Age 9
b. ~1931
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Cook |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | 2 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Medford City |
| Est. Birth Year | ~1931 |
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 Ruth | Age | Birth yr |
|---|---|---|---|---|
| Roy Cook | Son | — | 14 | ~1926 |
| Ruth Cook | Daughter | — | 9 | ~1931 |
| Robert Cook | Son | — | 19 | ~1921 |
| Charles Cook | Daughter | — | 1 | ~1939 |
| Donald Cook | Son | — | 12 | ~1928 |
| Neil Cook | Son | — | 17 | ~1923 |
| Ralph Cook | Son | — | 10 | ~1930 |
| Carl Cook | Son | — | 16 | ~1924 |
| Lulu Cook | Spouse | — | 40 | ~1900 |
| Ernest Cook | Son | — | 6 | ~1934 |
Census Appearances
1930
Middlesex, Massachusetts
Other, age 1
Middlesex, Massachusetts · implied b. ~1929 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Ruth L |
| Relationship to Head | Grand Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| 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
Daughter, age 9
Middlesex-County, Massachusetts · implied b. ~1931 — 10 household members
| Surname | Cook |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Highest Grade | 2 |
| 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 Ruth Cook across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Ruth Cook
Daughter · 1940 · age 9 · b. ~1931 · Massachusetts
★ You are viewing this record
Sibling
Donald Cook
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Cook
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ralph Cook
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Cook
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carl Cook
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Neil Cook
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ernest Cook
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roy Cook
Sibling · 1940 · age 14
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-t0627-01612-00787)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lulu Cook | 40 | Wife | — | Massachusetts |
| 2 | Robert Cook | 19 | Son | New Worker | Massachusetts |
| 3 | Neil Cook | 17 | Son | New Worker | Massachusetts |
| 4 | Carl Cook | 16 | Son | — | Massachusetts |
| 5 | Roy Cook | 14 | Son | — | Massachusetts |
| 6 | Donald Cook | 12 | Son | — | Massachusetts |
| 7 | Ralph Cook | 10 | Son | — | Massachusetts |
| 8 | Ruth Cook THIS PERSON | 9 | Daughter | — | Massachusetts |
| 9 | Ernest Cook | 6 | Son | — | Massachusetts |
| 10 | Charles Cook | 1 | Daughter | — | Massachusetts |
| 11 | Amanda Blair | 57 | Head | — | North Carolina |
| 12 | David H Blair | 32 | Son | — | North Carolina |
| 13 | Elizabeth Williams | 70 | Head | — | North Carolina |
| 14 | Bertha Warren | 48 | Daughter | — | Massachusetts |
| 15 | James Warren | 23 | Son | Domestic | Massachusetts |
| 16 | Arthur Warren | 22 | Son | New Worker | Massachusetts |
| 17 | Josephine Warren | 19 | Daughter | — | Massachusetts |
| 18 | Bessie Warren | 17 | Daughter | New Worker | Massachusetts |
| 19 | Cora Warren | 14 | Daughter | — | Massachusetts |
| 20 | Mervia Warren | 13 | Daughter | — | Massachusetts |
| 21 | Florence Warren | 12 | Daughter | — | Massachusetts |
| 22 | Raleigh Parham | 42 | Head | Gardner | North Carolina |
| 23 | Maybelle Parham | 46 | Wife | — | Massachusetts |
| 24 | William Parham | 24 | Son | — | Massachusetts |
| 25 | Verna Parham | 22 | Daughter | — | Massachusetts |
| 26 | Roy Parham | 18 | Son | — | Massachusetts |
| 27 | Muriel Parham | 11 | Daughter | — | Massachusetts |
| 28 | Ernest Phillips | 34 | Head | Surveyor | Massachusetts |
| 29 | Pearl Phillips | 29 | Wife | — | Massachusetts |
| 30 | Ernest Phillips | 7 | Son | — | Massachusetts |
| 31 | Dorothy Phillips | 5 | Daughter | — | Massachusetts |
| 32 | Muriel Phillips | 5 | Daughter | — | Massachusetts |
| 33 | Audrey Phillips | 4 | Daughter | — | Massachusetts |
| 34 | Eleanor Phillips | 2 | Daughter | — | Massachusetts |
| 35 | Robert Phillips | 1 | Son | — | Massachusetts |
| 36 | Charles Williams | 55 | Head | Laborer | Alabama |
| 37 | Dorothy Williams | 43 | Wife | — | North Carolina |
| 38 | Charles Snowden | 52 | Head | Interior Decorator | New York |
| 39 | Elizabeth Snowden | 49 | Wife | — | Virginia |
| 40 | Charlotte Snowden | 25 | Daughter | Maid | 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)