MC
Mary Clancy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Mary Clancy across the 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 7-person household.
Age 13
b. ~1917
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Clancy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Cambridge City |
| Est. Birth Year | ~1917 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Clancy | Spouse | — | 42 | ~1888 |
| James Clancy | Head | — | 47 | ~1883 |
| Catherine Clancy | Daughter | — | 9 | ~1921 |
| Margaret Clancy | Daughter | — | 7 | ~1923 |
| Mary Clancy | Daughter | — | 13 | ~1917 |
| John Clancy | Son | — | 11 | ~1919 |
| James Clancy | Son | — | 18 | ~1912 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 2
Middlesex, Massachusetts · implied b. ~1918
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Clancy |
| Given Name | Mary M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 13
Middlesex, Massachusetts · implied b. ~1917 — 7 household members
| Surname | Clancy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| 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 Clancy across 2 US Census years (1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Clancy
Daughter · 1930 · age 13 · b. ~1917 · Massachusetts
★ You are viewing this record
Sibling
Margaret Clancy
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Clancy
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Clancy
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Clancy
Sibling · 1930 · age 11
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
1930 US Federal Census — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
49 people indexed on this census page (ia:1930:massachusettscensus00reel916:1024)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 2 | Peter Mason | 45 | Head | — | Irish Free State |
| 3 | Catherine Mason | 35 | Wife | — | Irish Free State |
| 4 | Margaret Mason | 11 | Daughter | — | Massachusetts |
| 5 | James Mason | 27 | Son | Clerk | Massachusetts |
| 6 | John Mason | 27 | Son | Clerk | Massachusetts |
| 7 | Catherine Mason | 22 | Daughter | Hand Sewer | Massachusetts |
| 8 | Catherine Sullivan | 43 | Head | — | Massachusetts |
| 9 | Mary Sullivan | 16 | Daughter | — | Massachusetts |
| 10 | John Sullivan | 14 | Son | — | Massachusetts |
| 11 | Catherine Sullivan | 11 | Daughter | — | Massachusetts |
| 12 | Edward Lincoln | 42 | Head | Salesman | Massachusetts |
| 13 | Mary Lincoln | 36 | Wife | — | Massachusetts |
| 14 | Edward Lincoln | 13 | Son | — | Massachusetts |
| 15 | Mary Lincoln | 11 | Daughter | — | Massachusetts |
| 16 | James Burnes | 40 | Head | Cutter | England |
| 17 | Mary Burnes | 36 | Wife | — | England |
| 18 | James Burnes | 17 | Son | Clerk | England |
| 19 | Thomas Burnes | 15 | Son | Clerk | England |
| 20 | Joseph Cummings | 35 | Head | Salesman | Massachusetts |
| 21 | Mary Cummings | 31 | Wife | — | Massachusetts |
| 22 | Joseph Cummings | 5 | Son | — | Massachusetts |
| 23 | Mary Cummings | 4 | Daughter | — | Massachusetts |
| 24 | Elizabeth Cummings | 2 | Daughter | — | Massachusetts |
| 25 | Mildred Cummings | 1 | Daughter | — | Massachusetts |
| 26 | James Vincent | 43 | Head | Salesman | Massachusetts |
| 27 | Mary Vincent | 40 | Wife | — | Lithuania |
| 28 | James Vincent | 18 | Son | — | Massachusetts |
| 29 | Mary Vincent | 13 | Daughter | — | Massachusetts |
| 30 | John Vincent | 41 | Head | — | Canada Eng. |
| 31 | Mary Vincent | 41 | Wife | — | Canada Eng. |
| 32 | John Vincent | 18 | Son | — | Massachusetts |
| 33 | Mary Vincent | 13 | Daughter | — | Massachusetts |
| 34 | James Foley | 42 | Head | — | Irish Free State |
| 35 | Mary Foley | 42 | Wife | — | Irish Free State |
| 36 | James Foley | 18 | Son | Clerk | Massachusetts |
| 37 | Mary Foley | 16 | Daughter | — | Massachusetts |
| 38 | John Foley | 14 | Son | — | Massachusetts |
| 39 | Catherine Foley | 12 | Daughter | — | Massachusetts |
| 40 | James Clancy | 47 | Head | Salesman | Massachusetts |
| 41 | Mary Clancy | 42 | Wife | — | Massachusetts |
| 42 | James Clancy | 18 | Son | — | Massachusetts |
| 43 | Mary Clancy THIS PERSON | 13 | Daughter | — | Massachusetts |
| 44 | John Clancy | 11 | Son | — | Massachusetts |
| 45 | Catherine Clancy | 9 | Daughter | — | Massachusetts |
| 46 | Margaret Clancy | 7 | Daughter | — | Massachusetts |
| 47 | John Lundquist | 52 | Head | Repairman | Sweden |
| 48 | Esther Lundquist | 51 | Wife | Hand Sewer | Sweden |
| 49 | Anna Lundquist | 18 | Daughter | — | Massachusetts |
| 50 | John Lundquist | 15 | Son | — | Massachusetts |
Related Census Records
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)