MC
Martha Campbell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Martha Campbell across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 7-person household.
Age 10
b. ~1930
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Campbell |
| Given Name | Martha E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden (City) |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | G-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Malden City |
| Est. Birth Year | ~1930 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Martha | Age | Birth yr |
|---|---|---|---|---|
| Ernest Campbell | Son | — | 13 | ~1927 |
| Ernest Campbell | Head | — | 56 | ~1884 |
| Charles Campbell | Son | — | 8 | ~1932 |
| Jane Campbell | Spouse | — | 36 | ~1904 |
| Martha Campbell | Daughter | — | 10 | ~1930 |
| Mary Campbell | Daughter | — | 14 | ~1926 |
| Nancy Campbell | Daughter | — | 11 | ~1929 |
Census Appearances
1930
Middlesex, Massachusetts
Daughter, age
Middlesex, Massachusetts · implied b. ~1930 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Martha A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Canada English |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 10
Middlesex-County, Massachusetts · implied b. ~1930 — 7 household members
| Surname | Campbell |
| Given Name | Martha E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden (City) |
| 1935 Residence (County) | Middlesex |
| Highest Grade | G-4 |
| 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 Martha Campbell across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Martha Campbell
Daughter · 1940 · age 10 · b. ~1930 · Massachusetts
★ You are viewing this record
Sibling
Ernest Campbell
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nancy Campbell
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Campbell
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Campbell
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
39 people indexed on this census page (nara:1940:m-t0627-01609-00336)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Gordon Gordon | 40 | Son | Salesman | Massachusetts |
| 2 | Isabel R Crawford | 72 | Mother-in-law | — | Scotland |
| 3 | Mary L Raposa | 43 | Head | — | Portugal |
| 4 | Joseph Gaggiani | 31 | Son-in-law | Proprietor | Massachusetts |
| 5 | Louise E Gaggiani | 20 | Daughter | — | Massachusetts |
| 6 | Michael A Gaggiani | 9 | Grandson | — | Massachusetts |
| 7 | Joseph Gaggiani | 2 | Grandson | — | Massachusetts |
| 8 | Frances J Gaggiani | 1 | Granddaughter | — | Massachusetts |
| 9 | Anthony Raposa | 45 | Brother | Stationary Fireman | Portugal |
| 10 | Ernest P Campbell | 56 | Head | Marine Engineer | Canada English |
| 11 | Jane Campbell | 36 | Wife | — | Massachusetts |
| 12 | Mary J Campbell | 14 | Daughter | — | Massachusetts |
| 13 | Ernest Jr Campbell | 13 | Son | — | Massachusetts |
| 14 | Nancy E Campbell | 11 | Daughter | — | Massachusetts |
| 15 | Martha E Campbell THIS PERSON | 10 | Daughter | — | Massachusetts |
| 16 | Charles H Campbell | 8 | Son | — | Massachusetts |
| 17 | Albertina De Santo | 42 | Head | — | Massachusetts |
| 18 | George V De Santo | 22 | Son | Shipping Clerk | Massachusetts |
| 19 | Florence M De Santo | 20 | Daughter | — | Massachusetts |
| 20 | Edward W Palmgren | 38 | Brother | Laborer | Massachusetts |
| 21 | Gladys Palmgren | 35 | Sister-in-law | — | Massachusetts |
| 22 | Dorothy B Palmgren | 18 | Niece | — | Massachusetts |
| 23 | Ernest G Fink | 46 | Head | Salesman | New York |
| 24 | Sarah J Fink | 37 | Wife | — | Massachusetts |
| 25 | Jacob J Fink | 7 | Son | — | Massachusetts |
| 26 | Matthew J Fink | 1 | Son | — | Massachusetts |
| 27 | Charlotte M Langiell | 74 | Head | — | Massachusetts |
| 28 | Warren D Langiell | 46 | Son | Contractor | Massachusetts |
| 29 | Charles D Jackson | 45 | Head | Laborer | New Hampshire |
| 30 | Bessie Sagnage | 66 | Lodger | — | New Hampshire |
| 31 | Ada Baxter | 54 | Lodger | — | Massachusetts |
| 32 | Joseph P Gibbons | 57 | Lodger | — | Massachusetts |
| 33 | Carl E Lundgren | 24 | Head | Painter | Massachusetts |
| 34 | Olive H Lundgren | 23 | Wife | — | Massachusetts |
| 35 | Carl G Lundgren | 2 | Son | — | Massachusetts |
| 36 | John E Snowe | 21 | Head | Truck Driver | Massachusetts |
| 37 | Thelma A Snowe | 22 | Wife | — | Maine |
| 38 | Elmer Snowe | 15 | Brother | — | Massachusetts |
| 39 | Phyllis Snowe | 14 | Sister | — | 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)