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Frank Cox — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Frank Cox across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1904), then head of a 9-person household.
Age 36
b. ~1904
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Cox |
| Given Name | Frank |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Presser |
| Industry | Shoe shop |
| Class of Worker | PW |
| Hours Worked | 16 |
| Income (1939) | 446 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Presser |
| Township / Ward | Lowell City |
| Est. Birth Year | ~1904 |
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 Frank | Age | Birth yr |
|---|---|---|---|---|
| Patrick Cox | Son | — | 4 | ~1936 |
| Cora Cox | Spouse | — | 33 | ~1907 |
| Raymond Cox | Son | — | 5 | ~1935 |
| John Cox | Son | — | 9 | ~1931 |
| James Cox | Son | — | 11 | ~1929 |
| Robert Cox | Son | — | 6 | ~1934 |
| Edward Cox | Son | — | 8 | ~1932 |
| Barbara Cox | Daughter | — | 10 | ~1930 |
| Frank Cox | Head | — | 36 | ~1904 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 25
Middlesex, Massachusetts · implied b. ~1905 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | Frank J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | North Ireland |
| Mother's Birthplace | North Ireland |
| Occupation | Printer |
| Industry | job printing |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 36
Middlesex-County, Massachusetts · implied b. ~1904 — 9 household members
| Surname | Cox |
| Given Name | Frank |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell City |
| 1935 Residence (County) | Middlesex |
| Occupation | Presser |
| Industry | Shoe shop |
| Class of Worker | PW |
| Hours Worked | 16 |
| Income (1939) | 446 |
| Highest Grade | 8 |
| 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 Frank Cox across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Frank Cox
Head · 1940 · age 36 · b. ~1904 · 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-t0627-01694-00504)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Loyd Macphail | 21 | son | Laborer | Massachusetts |
| 42 | Ernest Pollard | 21 | head | Laborer | Massachusetts |
| 43 | Helen Pollard | 22 | daughter | — | Massachusetts |
| 44 | Ennas Grondy | 29 | head | Twister | Massachusetts |
| 45 | Ray Grondy | 9 | son | — | Maine |
| 46 | Kenneth Grondy | 8 | son | — | Maine |
| 47 | Frieda Grondy | 4 | daughter | — | Connecticut |
| 48 | James Valsh | 27 | head | Laborer | Massachusetts |
| 49 | Margaret Valsh | 27 | wife | — | Massachusetts |
| 50 | Gerald Valsh | 6 | son | — | Massachusetts |
| 51 | Donald Valsh | 4 | son | — | Massachusetts |
| 52 | George Valsh | 2 | son | — | Massachusetts |
| 53 | Delia Cullinan | 61 | mother-in-law | — | Irish Free State |
| 54 | Henry Mayo | 55 | head | Presser | Massachusetts |
| 55 | Cecelia Mayo | 53 | wife | — | Massachusetts |
| 56 | Madalyn Mayo | 23 | daughter | Waitress | Massachusetts |
| 57 | William Mayo | 20 | son | Laborer | Massachusetts |
| 58 | Walter Mayo | 17 | son | — | Massachusetts |
| 59 | Thomas O'Brien | 68 | head | — | England |
| 60 | Cora O'Brien | 60 | wife | — | Massachusetts |
| 61 | Thomas Connolly | 22 | head | Laborer | Massachusetts |
| 62 | Margaret Connolly | 29 | sister | Stitcher | Massachusetts |
| 63 | William Shea | 34 | head | Machinist | Massachusetts |
| 64 | Agnes Shea | 30 | wife | Marker | Massachusetts |
| 65 | Patricia Shea | 6 | daughter | — | Massachusetts |
| 66 | Edward Shea | 1 | son | — | Massachusetts |
| 67 | John Gordon | 52 | head | Laborer | Maine |
| 68 | Mary C. Gordon | 48 | wife | — | Massachusetts |
| 69 | Henrietta Gordon | 18 | daughter | Helper | Massachusetts |
| 70 | John H. Gordon | 17 | son | — | Massachusetts |
| 71 | Marion Gordon | 9 | daughter | — | Massachusetts |
| 72 | Frank Cox THIS PERSON | 36 | head | Presser | Massachusetts |
| 73 | Cora Cox | 33 | wife | — | Massachusetts |
| 74 | James L. Cox | 11 | son | — | Massachusetts |
| 75 | Barbara Cox | 10 | daughter | — | Massachusetts |
| 76 | John T. Cox | 9 | son | — | Massachusetts |
| 77 | Edward F. Cox | 8 | son | — | Massachusetts |
| 78 | Robert J. Cox | 6 | son | — | Massachusetts |
| 79 | Raymond Cox | 5 | son | — | Massachusetts |
| 80 | Patrick Cox | 4 | son | — | 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)