JH
James Harrington — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this James Harrington across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Dennis & Katherine — first a head (b.~1895), then head of a 3-person household.
Age 45
b. ~1895
Male
Head
Born: Maine
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Harrington |
| Given Name | James F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Maine |
| 1935 Residence (City) | Lowell |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Brakeman |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 64 |
| Income (1939) | 2200 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
| Occupation | Brakeman |
| Township / Ward | Lowell |
| Est. Birth Year | ~1895 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Harrington | Head | — | 45 | ~1895 |
| Mary Harrington | Daughter | — | 5 | ~1935 |
| Mary Harrington | Spouse | — | 46 | ~1894 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 25
Middlesex, Massachusetts · implied b. ~1895 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harrington |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Maine |
| Father's Birthplace | England |
| Mother's Birthplace | Pennsylvania |
| Occupation | Clerk |
| Industry | Boston Maine |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1930
Middlesex, Massachusetts
Son, age 34
Middlesex, Massachusetts · implied b. ~1896 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harrington |
| Given Name | James P |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Maine |
| Father's Birthplace | England |
| Mother's Birthplace | Pennsylvania |
| Occupation | Commercial Agent |
| Industry | Steam Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | Yes WW |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1940
Middlesex-County, Massachusetts
Head, age 45
Middlesex-County, Massachusetts · implied b. ~1895 — 3 household members
| Surname | Harrington |
| Given Name | James F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Maine |
| 1935 Residence (City) | Lowell |
| 1935 Residence (County) | Middlesex |
| Occupation | Brakeman |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 64 |
| Income (1939) | 2200 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
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 James Harrington across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Dennis Harrington (~0.92 confidence) and mother Katherine Harrington (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Dennis Harrington
b. ~1861
Source father
● Household
· direct · ~0.92
Mother
Katherine Harrington
b. ~1865
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Harrington
Head · 1940 · age 45 · b. ~1895 · Massachusetts
★ You are viewing this record
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
38 people indexed on this census page (nara:1940:m-t0627-01693-00376)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William J. O'Connell | 48 | Head | Mail Carrier | Massachusetts |
| 42 | Marie A. O'Connell | 38 | Wife | — | Vermont |
| 43 | Carolyn M. O'Connell | 9 | Daughter | — | Massachusetts |
| 44 | Herbert M. Bartlett | 44 | Head | Mechanic | New Hampshire |
| 45 | Eva I. Bartlett | 33 | Wife | — | Rhode Island |
| 46 | Charles E. Bartlett | 20 | Son | Map Maker | Massachusetts |
| 47 | Ruth M. Bartlett | 16 | Daughter | — | Massachusetts |
| 48 | Edward F. Russell | 64 | Head | Machinist | Massachusetts |
| 49 | Agnes G. Russell | 66 | Wife | — | Massachusetts |
| 50 | Earl L. Mcanany | 47 | Head | Foreman | Massachusetts |
| 51 | Esther M. Mcanany | 47 | Wife | — | New Hampshire |
| 52 | Dorothy E. Mcanany | 14 | Daughter | — | Massachusetts |
| 53 | Marion L. Mcanany | 11 | Daughter | — | Massachusetts |
| 54 | James F. Harrington THIS PERSON | 45 | Head | Brakeman | Maine |
| 55 | Mary T. Harrington | 46 | Wife | — | Massachusetts |
| 56 | Mary Harrington | 5 | Daughter | — | Massachusetts |
| 57 | Sharpe N. Morse | 62 | Head | Truck Driver | Massachusetts |
| 58 | Amy P. Morse | 60 | Wife | — | Massachusetts |
| 59 | John A. Chapman | 59 | Head | Pavement Cutter | England |
| 60 | Bertha Chapman | 60 | Wife | — | New Hampshire |
| 61 | Miles C. Bates | 31 | Head | Shipping Manager | Massachusetts |
| 62 | Dorothy M. Bates | 32 | Wife | — | Massachusetts |
| 63 | Florence Palmer | 58 | Boarder | Executive Secy | Ohio |
| 64 | Fred Timmons | 70 | Head | Salesman | England |
| 65 | William Timmons | 31 | Son | Laborer | Massachusetts |
| 66 | George Timmons | 25 | Son | Stock Clerk | Massachusetts |
| 67 | Helen Timmons | 23 | Daughter | — | Massachusetts |
| 68 | Paul H. Timmons | 17 | Son | — | Massachusetts |
| 69 | Ruth Timmons | 12 | Daughter | — | Massachusetts |
| 71 | Charles L. Tranter | 76 | Head | Operator | Delaware |
| 72 | Lelia G. Tranter | 71 | Wife | — | Massachusetts |
| 73 | Alice G. Johnson | 92 | Mother-in-law | — | Massachusetts |
| 74 | Carl H. Heglow | 33 | Head | Shoe Repairer | Massachusetts |
| 75 | Mary D. Heglow | 28 | Wife | — | Canada Eng |
| 76 | John Heglow | 8 | Son | — | Massachusetts |
| 77 | Elsie Heglow | 6 | Daughter | — | Massachusetts |
| 78 | Frederick C. Heglow | 1 | Son | — | Massachusetts |
| 80 | Ernest D. Malley | 61 | Head | Variety Store | Massachusetts |
Pedigree Summary
James
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)