MH
Mary Harrington — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Mary Harrington across the 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1888), then head of a 10-person household.
Age 42
b. ~1888
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Harrington |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | Bookkeeper |
| Industry | Clothing Mfg. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Bookkeeper |
| Township / Ward | Cambridge City |
| Est. Birth Year | ~1888 |
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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Ruth Harrington | Daughter | — | 34 | ~1896 |
| Mary Harrington | Daughter | — | 42 | ~1888 |
| Alice Harrington | Daughter | — | 32 | ~1898 |
| Gertrude Harrington | Daughter | — | 36 | ~1894 |
| Mary Harrington | Head | — | 63 | ~1867 |
| Doris Harrington | Other | — | 32 | ~1898 |
| Stephen Harrington | Son | — | 2 | ~1928 |
| Alice Harrington | Son | — | 38 | ~1892 |
| James Harrington | Son | — | 24 | ~1906 |
| George Harrington | Son | — | 30 | ~1900 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 32
Middlesex, Massachusetts · implied b. ~1888 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harrington |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New Hampshire |
| 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 42
Middlesex, Massachusetts · implied b. ~1888 — 10 household members
| Surname | Harrington |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | Massachusetts |
| Occupation | Bookkeeper |
| Industry | Clothing Mfg. |
| Class of Worker | W |
| 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 Harrington across 2 US Census years (1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Harrington
Daughter · 1930 · age 42 · b. ~1888 · Massachusetts
★ You are viewing this record
Sibling
Alice Harrington
Sibling · 1930 · age 38
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Harrington
Sibling · 1930 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Harrington
Sibling · 1930 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Harrington
Sibling · 1930 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stephen Harrington
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Harrington
Sibling · 1930 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Harrington
Sibling · 1930 · age 36
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
50 people indexed on this census page (ia:1930:massachusettscensus00reel915:0825)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John A. Sotino | 9 | Son | — | Massachusetts |
| 2 | Anthony Sotino | 6 | Son | — | Massachusetts |
| 3 | Sam Rinschew | 42 | Head | Laborer | Lithuania |
| 4 | Frances Rinschew | 38 | Wife | — | Lithuania |
| 5 | Stanley Rinschew | 11 | Son | — | Massachusetts |
| 6 | Joseph Rinschew | 8 | Son | — | Massachusetts |
| 7 | William Rinschew | 6 | Son | — | Massachusetts |
| 8 | Helen Rinschew | 2 | Daughter | — | Massachusetts |
| 9 | Fred A. Muslow | 49 | Boarder | Contractor | Poland |
| 10 | Mary Wurwick | 19 | Boarder | Stitcher | Massachusetts |
| 11 | Louis J. Lutz | 48 | Head | Fireman | Massachusetts |
| 12 | Victor Lutz | 38 | Brother | Salesman | Massachusetts |
| 13 | Ursula Lutz | 41 | Daughter | Operator | Massachusetts |
| 14 | Elizabeth Lutz | 78 | Mother | — | New York |
| 15 | Herbert Ardell | 55 | Head | Mechanic | Russia |
| 16 | Rebecca Ardell | 50 | Wife | — | Russia |
| 17 | Celia Ardell | 27 | Daughter | Secretary | Russia |
| 18 | Patrick Mulhern | 68 | Head | Shoe Maker | Irish Free State |
| 19 | Margaret Mulhern | 69 | Wife | — | Irish Free State |
| 20 | Margaret Mulhern | 35 | Daughter | — | Rhode Island |
| 21 | John F. Mulhern | 38 | Son | Brass Worker | Rhode Island |
| 22 | James F. Mulhern | 46 | Head | Fireman | Rhode Island |
| 23 | Anna Mulhern | 39 | Wife | — | Massachusetts |
| 24 | Edward Mulhern | 12 | Son | — | Massachusetts |
| 25 | Richard Mulhern | 10 | Son | — | Massachusetts |
| 26 | Mary Mulhern | 7 | Daughter | — | Massachusetts |
| 27 | Robert Mulhern | 4 | Son | — | Massachusetts |
| 28 | James J. Gane | 47 | Head | Asst. Supt. | Irish Free State |
| 29 | Sarah Gane | 50 | Wife | — | Massachusetts |
| 30 | James M. Gane | 21 | Son | — | Massachusetts |
| 31 | Mary R. Gane | 18 | Daughter | — | Massachusetts |
| 32 | Helen S. Gane | 14 | Daughter | — | Massachusetts |
| 33 | Mary A. Harrington | 63 | Head | — | Massachusetts |
| 34 | Mary M. Harrington THIS PERSON | 42 | Daughter | Bookkeeper | Massachusetts |
| 35 | Alice J. Harrington | 38 | Son | Broker | Massachusetts |
| 36 | Gertrude F. Harrington | 36 | Daughter | Bookkeeper | Massachusetts |
| 37 | Ruth E. Harrington | 34 | Daughter | Stenographer | Massachusetts |
| 38 | Alice G. Harrington | 32 | Daughter | — | Massachusetts |
| 39 | George H. Harrington | 30 | Son | Office Work | Massachusetts |
| 40 | Doris G. Harrington | 32 | Daughter-in-law | — | Massachusetts |
| 41 | Stephen A. Harrington | 2 | Son | — | Massachusetts |
| 42 | James F. Harrington | 24 | Son | — | Massachusetts |
| 43 | Mary Bridges | 60 | Head | — | Canada English |
| 44 | Mary S. Bridges | 30 | Daughter | Clerk | Massachusetts |
| 45 | Edward W. Bridges | 25 | Son | Asst. Editor | Massachusetts |
| 46 | Leo J. Bridges | 22 | Son | Bookkeeper | Massachusetts |
| 47 | Wm. A. Bridges | 24 | Son | Bulb Inspector | Massachusetts |
| 48 | Wm. J. Bridges | 66 | Brother | Bookkeeper | Canada English |
| 49 | Joseph Vincent | 39 | Head | Grocer | Lithuania |
| 50 | Julia Vincent | 32 | Wife | — | Lithuania |
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)