MH
Mary Harrington — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hampden-County, Massachusetts
Our Model Tree links this Mary Harrington across the 1930 and 1940 US Censuses in Hampden-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 8-person household.
Age 14
b. ~1926
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hampden-County, Massachusetts |
| Surname | Harrington |
| Given Name | Mary I |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Holyoke |
| 1935 Residence (County) | Hampden |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Holyoke |
| Est. Birth Year | ~1926 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Ellinor Harrington | Daughter | — | 20 | ~1920 |
| Mary Harrington | Daughter | — | 14 | ~1926 |
| Anne Harrington | Daughter | — | 13 | ~1927 |
| Patricia Harrington | Daughter | — | 8 | ~1932 |
| Catherine Harrington | Daughter | — | 17 | ~1923 |
| Patrick Harrington | Head | — | 50 | ~1890 |
| Thomas Harrington | Son | — | 21 | ~1919 |
| Bridget Harrington | Spouse | — | 49 | ~1891 |
Census Appearances
1930
Hampden, Massachusetts
Daughter, age 4
Hampden, Massachusetts · implied b. ~1926 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harrington |
| Given Name | Mary I. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | none |
| Can Read/Write | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Hampden-County, Massachusetts
Daughter, age 14
Hampden-County, Massachusetts · implied b. ~1926 — 8 household members
| Surname | Harrington |
| Given Name | Mary I |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Holyoke |
| 1935 Residence (County) | Hampden |
| Highest Grade | No 8 |
| 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 Harrington across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Harrington
Daughter · 1940 · age 14 · b. ~1926 · Massachusetts
★ You are viewing this record
Sibling
Thomas Harrington
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Harrington
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ellinor Harrington
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Harrington
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anne Harrington
Sibling · 1940 · age 13
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 — Hampden-County, Massachusetts
Open full size
1940 US Federal Census — Hampden-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01596-00377)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Juilliett V Roch | 31 | Daughter | Dental Assistant | Massachusetts |
| 42 | Eugene P Desrochers | 36 | Head | Millwright | Canada French |
| 43 | Rosamond Desrochers | 35 | Wife | — | Massachusetts |
| 44 | Patience R Desrochers | 11 | Daughter | — | Massachusetts |
| 45 | Jacqueline A Desrochers | 10 | Daughter | — | Massachusetts |
| 46 | Richard A Desrochers | 6 | Son | — | Massachusetts |
| 47 | Ronald E Desrochers | 4 | Son | — | Massachusetts |
| 48 | Frances P Griffin | 35 | Head | Laborer | Massachusetts |
| 49 | Doris Griffin | 29 | Wife | — | Massachusetts |
| 50 | Walter F Griffin | 11 | Son | — | Massachusetts |
| 51 | James E Griffin | 6 | Son | — | Massachusetts |
| 52 | John B Griffin | 12 | Son | — | Massachusetts |
| 53 | Patrick M Harrington | 50 | Head | Fireman-Helper | Irish Free State |
| 54 | Bridget Harrington | 49 | Wife | — | Irish Free State |
| 55 | Thomas F Harrington | 21 | Son | Laborer | Massachusetts |
| 56 | Ellinor T Harrington | 20 | Daughter | Sewing | Massachusetts |
| 57 | Catherine M Harrington | 17 | Daughter | — | Massachusetts |
| 58 | Mary I Harrington THIS PERSON | 14 | Daughter | — | Massachusetts |
| 59 | Anne R Harrington | 13 | Daughter | — | Massachusetts |
| 60 | Patricia A Harrington | 8 | Daughter | — | Massachusetts |
| 61 | Michael W Donohue | 56 | Head | Blacksmith | Irish Free State |
| 62 | Bridget Donohue | 53 | Wife | — | Irish Free State |
| 63 | Mary E Donohue | 15 | Daughter | — | Massachusetts |
| 64 | Anna L Donohue | 13 | Daughter | — | Massachusetts |
| 65 | Margaret R Picard | 84 | Head | — | Irish Free State |
| 66 | Helen Picard | 46 | Daughter | Cloth Inspector | Massachusetts |
| 67 | George J Picard | 40 | Boarder | Repairman | Massachusetts |
| 68 | Arthur F Roberts | 57 | Head | Printer | Massachusetts |
| 69 | Gertrude M Roberts | 56 | Wife | — | Massachusetts |
| 70 | Henry V Roberts | 29 | Son | Repairing Boy | Massachusetts |
| 71 | Frank W Roberts | 27 | Son | Board Boy | Massachusetts |
| 72 | Yvonne R Roberts | 25 | Daughter | Clerical Work | Massachusetts |
| 73 | Lillian M Roberts | 20 | Daughter | Student Nurse | Massachusetts |
| 74 | Raymond F Roberts | 16 | Son | — | Massachusetts |
| 75 | Gertrude O Roberts | 15 | Daughter | — | Massachusetts |
| 76 | John Tognari | 44 | Head | Tire Maker | Italy |
| 77 | Lena M Tognari | 45 | Wife | — | Italy |
| 78 | William J Tognari | 20 | Son | Garage Salesman | Massachusetts |
| 79 | Flora C Tognari | 17 | Daughter | — | Massachusetts |
| 80 | Donald Tognari | 16 | Son | New Worker | 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)