MC
Mary Clifford — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Clifford across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 9-person household.
Age 13
b. ~1927
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Clifford |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | G 7 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1927 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Daniel Clifford | Son | — | 5 | ~1935 |
| Patrick Clifford | Head | — | 40 | ~1900 |
| Theresa Clifford | Daughter | — | 7 | ~1933 |
| Mary Clifford | Spouse | — | 39 | ~1901 |
| Noreen Clifford | Daughter | — | ~1940 | |
| Patricia Clifford | Daughter | — | 9 | ~1931 |
| Mary Clifford | Daughter | — | 13 | ~1927 |
| John Brown | Other | — | 60 | ~1880 |
| Johanna Clifford | Daughter | — | 11 | ~1929 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 3
Suffolk, Massachusetts · implied b. ~1927 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clifford |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 13
Suffolk-County, Massachusetts · implied b. ~1927 — 9 household members
| Surname | Clifford |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | G 7 |
| 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 Mary Clifford across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Clifford
Daughter · 1940 · age 13 · b. ~1927 · Massachusetts
★ You are viewing this record
Sibling
Johanna Clifford
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Noreen Clifford
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Clifford
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Clifford
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Clifford
Sibling · 1940 · age 5
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-t0627-01668-00306)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Silva | 18 | daughter | Maid | Massachusetts |
| 2 | Catherine Silva | 15 | daughter | — | Massachusetts |
| 3 | Helen G. Silva | 13 | daughter | — | Massachusetts |
| 4 | Ann T. Silva | 11 | daughter | — | Massachusetts |
| 5 | Madeline R. Silva | 9 | daughter | — | Massachusetts |
| 6 | Margaret Mcinerney | 71 | head | — | Northern Ireland |
| 7 | Joseph E. Mcinerney | 41 | son | Court Officer | Massachusetts |
| 8 | Margaret M. Mchugh | 40 | head | Teacher | Massachusetts |
| 9 | Margaret E. Swigran | 80 | aunt | — | South Ireland |
| 10 | Joseph P. Cronin | 34 | head | Laborer | Massachusetts |
| 11 | Margaret H. Cronin | 32 | wife | — | Massachusetts |
| 12 | Robert E. Cronin | 11 | son | — | Massachusetts |
| 13 | Joseph P. Cronin | 1 | son | — | Massachusetts |
| 14 | Richard L. Cronin | 0 | son | — | Massachusetts |
| 15 | Lawson H. Levy | 34 | head | Manager | Canada English |
| 16 | Yvonne E. Levy | 29 | wife | Nurse | Vermont |
| 17 | Thomas Christopher | 12 | head | — | Irish Free State |
| 18 | Helen M. Christopher | 48 | wife | — | New York |
| 19 | Abbie Trébuson | 46 | head | — | Irish Free State |
| 20 | Nancy Trébuson | 11 | daughter | — | Massachusetts |
| 21 | George Ramone | 61 | head | Watchman | Irish Free State |
| 22 | Mary E. Ramone | 59 | wife | — | England |
| 23 | George P. Ramone | 20 | son | Doorman | Massachusetts |
| 24 | Gertrude I. Ramone | 16 | daughter | — | Massachusetts |
| 25 | Clarence E. Thurston | 51 | head | Machinist | Canada English |
| 26 | John M. Thurston | 20 | son | Machinist Helper | Canada English |
| 27 | Jeffrey R. Thurston | 16 | son | News Boy | Massachusetts |
| 28 | Cecil E. Thurston | 13 | son | — | Massachusetts |
| 29 | Alma I. Thurston | 12 | daughter | — | Massachusetts |
| 30 | Arthur W. Thurston | 11 | son | — | Massachusetts |
| 31 | Patrick Clifford | 40 | head | Asst. Proj. Engineer | Irish Free State |
| 32 | Mary Clifford | 39 | wife | — | Irish Free State |
| 33 | Mary Clifford THIS PERSON | 13 | daughter | — | Massachusetts |
| 34 | Johanna Clifford | 11 | daughter | — | Massachusetts |
| 35 | Patricia Clifford | 9 | daughter | — | Massachusetts |
| 36 | Theresa Clifford | 7 | daughter | — | Massachusetts |
| 37 | Daniel F. Clifford | 5 | son | — | Massachusetts |
| 38 | Noreen F. Clifford | 0 | daughter | — | Massachusetts |
| 39 | John Brown | 60 | friend | Shipping Clerk | Massachusetts |
| 40 | George W. Hardiman | 30 | head | Laborer | Massachusetts |
Related Census Records
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)