MC
Marion Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Marion Clark across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1884), then head of a 6-person household.
Age 56
b. ~1884
Female
Head
Born: England
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Clark |
| Given Name | Marion |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Widowed |
| Birthplace | England |
| 1935 Residence (City) | Somerville city |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Alien |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | England |
| Birthplace (normalized) | england |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1884 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Marion | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Crocket | Other | — | 36 | ~1904 |
| Marion Clark | Head | — | 56 | ~1884 |
| Doris Clark | Daughter | — | 17 | ~1923 |
| Mary Crocket | Other | — | 37 | ~1903 |
| Mary Clark | Daughter | — | 15 | ~1925 |
| Janet Clark | Daughter | — | 30 | ~1910 |
Census Appearances
1920
Middlesex, Massachusetts
Spouse, age 37
Middlesex, Massachusetts · implied b. ~1883 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clarke |
| Given Name | Marion |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | England |
| Year of Immigration | 1912 |
| Naturalization Status | Alien |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1930
Middlesex, Massachusetts
Head, age 47
Middlesex, Massachusetts · implied b. ~1883 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clarke |
| Given Name | Marion |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Widowed |
| Birthplace | England |
| Naturalization Status | Naturalized |
| Year of Immigration | 1905 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 19 |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Middlesex-County, Massachusetts
Head, age 56
Middlesex-County, Massachusetts · implied b. ~1884 — 6 household members
| Surname | Clark |
| Given Name | Marion |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Widowed |
| Birthplace | England |
| 1935 Residence (City) | Somerville city |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Alien |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| 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 Marion Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Marion Clark
Head · 1940 · age 56 · b. ~1884 · 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-t0627-01705-00326)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Newman B. Birk | 34 | Head | Teacher | Kentucky |
| 2 | Genevieve Birk | 31 | Wife | — | Illinois |
| 3 | Amanda Birk | 12 | Daughter | — | Massachusetts |
| 4 | Gerald Birk | 10 | Son | — | Massachusetts |
| 5 | Eugene D. Donnell | 72 | Head | — | Massachusetts |
| 6 | Susanna Donnell | 71 | Wife | — | Massachusetts |
| 7 | John R. Crawford | 33 | Lodger | Credit Reporter | Alabama |
| 8 | Albert E. Loving | 33 | Head | History Professor | Massachusetts |
| 9 | Elaine Loving | 29 | Wife | — | Massachusetts |
| 10 | Steven M. Loving | 1 | Son | — | Massachusetts |
| 11 | Carlton A. Wheeler | 64 | Head | University Professor | New Hampshire |
| 12 | Wheeler | 62 | Wife | — | Maryland |
| 13 | Jeremiah Folkard | 36 | Head | Advertising Clerk | England |
| 14 | Ruth Folkard | 34 | Wife | — | Massachusetts |
| 15 | David Folkard | 7 | Son | — | Massachusetts |
| 16 | Jane Folkard | 4 | Daughter | — | Massachusetts |
| 17 | Bjarne Steen | 42 | Head | Proprietor | Norway |
| 18 | Johanna Steen | 40 | Wife | — | Norway |
| 19 | John Lynch | 55 | Head | Registered Pharmacist | Massachusetts |
| 20 | Christine Lynch | 52 | Wife | — | Massachusetts |
| 21 | Mary E. Lynch | 21 | Daughter | Secretarial Work | New Hampshire |
| 22 | Katherine Lynch | 18 | Daughter | — | Massachusetts |
| 23 | John J. Lynch | 17 | Son | — | Massachusetts |
| 24 | Edward A. Lynch | 11 | Son | — | Massachusetts |
| 25 | Adelaide Foster | 71 | Head | — | Massachusetts |
| 26 | Lloyd W. Knight | 50 | Head | Accountant Supervisor | Massachusetts |
| 27 | Marion J. Knight | 50 | Wife | — | Massachusetts |
| 28 | Douglas J. Knight | 16 | Son | — | Massachusetts |
| 29 | Robert J. Knight | 13 | Son | — | Massachusetts |
| 30 | Flora | 83 | Mother | — | Maine |
| 31 | Marion Clark THIS PERSON | 56 | Head | — | England |
| 32 | Janet E. Clark | 30 | Daughter | Clerical Position | England |
| 33 | Doris E. Clark | 17 | Daughter | — | Massachusetts |
| 34 | Mary V. Clark | 15 | Daughter | — | Massachusetts |
| 35 | Mary Scott Crocket | 37 | Lodger | Bookkeeper | Scotland |
| 36 | Elizabeth A. Crocket | 36 | Lodger | Operator | Scotland |
| 37 | William Ferguson | 37 | Head | Plasterer | Scotland |
| 38 | Marian Ferguson | 35 | Wife | Clerical | England |
| 39 | Ellen Ferguson | 16 | Daughter | — | Massachusetts |
| 40 | David Ferguson | 14 | 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)