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James Donnelly — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this James Donnelly across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 7-person household.
Age 15
b. ~1925
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Donnelly |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Student |
| Income (1939) | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Student |
| Township / Ward | Boston City |
| Est. Birth Year | ~1925 |
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 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Michael Donnelly | Head | — | 43 | ~1897 |
| Paul Donnelly | Son | — | 9 | ~1931 |
| Mary Donnelly | Spouse | — | 35 | ~1905 |
| Michael Donnelly | Son | — | 11 | ~1929 |
| Joseph Donnelly | Son | — | 17 | ~1923 |
| Blanche Donnelly | Daughter | — | 3 | ~1937 |
| James Donnelly | Son | — | 15 | ~1925 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 5
Suffolk, Massachusetts · implied b. ~1925 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donnolly |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Newfoundland |
| Mother's Birthplace | Newfoundland |
| Occupation | none |
| Can Read/Write | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 15
Suffolk-County, Massachusetts · implied b. ~1925 — 7 household members
| Surname | Donnelly |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Student |
| Income (1939) | 0 |
| Highest Grade | H-1 |
| 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 James Donnelly across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Donnelly
Son · 1940 · age 15 · b. ~1925 · Massachusetts
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Sibling
Joseph Donnelly
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Donnelly
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Michael Donnelly
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Blanche Donnelly
Sibling · 1940 · age 3
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-t0627-01670-00095)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Bridget Fay | 47 | Wife | Housewife | Eire |
| 42 | Helen Fay | 23 | Daughter | Packer | Massachusetts |
| 43 | Howard Fay | 18 | Son | Student | Massachusetts |
| 44 | Lawrence Fay | 17 | Son | Student | Massachusetts |
| 45 | Vincent Fay | 14 | Son | Student | Massachusetts |
| 46 | Donald Fay | 10 | Son | — | Massachusetts |
| 47 | Richard Fay | 8 | Son | — | Massachusetts |
| 48 | Barbara Fay | 6 | Daughter | — | Massachusetts |
| 49 | Allan J. Lillis | 43 | Head | Senior Clerk | Nova Scotia |
| 50 | Florence Lillis | 41 | Wife | Housewife | Nova Scotia |
| 51 | Archie Lillis | 15 | Son | — | Massachusetts |
| 52 | Robert Lillis | 14 | Son | — | Massachusetts |
| 53 | Gilbert Lillis | 12 | Son | — | Massachusetts |
| 54 | Paul Lillis | 11 | Son | — | Massachusetts |
| 55 | Doris Lillis | 8 | Daughter | — | Massachusetts |
| 56 | Martha Lillis | 2 | Daughter | — | Massachusetts |
| 57 | John Edward Nelson | 67 | Head | Printer | Massachusetts |
| 58 | Mary Nelson | 67 | Wife | Housewife | Northern Ireland |
| 59 | John E. Nelson | 40 | Son | Bartender | Massachusetts |
| 60 | Laura E. Nelson | 40 | Daughter-in-law | Housewife | Massachusetts |
| 61 | John E. Nelson | 13 | Grandson | — | Massachusetts |
| 62 | Mark Samuel | 50 | Head | Salesman | Massachusetts |
| 63 | Bertha Samuel | 35 | Wife | Housewife | Massachusetts |
| 64 | Lillian Samuel | 12 | Daughter | — | Massachusetts |
| 65 | Arsene Fountain | 49 | Head | Wood Helper | Maine |
| 66 | Ruby Fountain | 43 | Wife | Ward Helper | Texas |
| 67 | Mary Mayos | 69 | Lodger | Housewife | Massachusetts |
| 68 | Michael J. Donnelly | 43 | Head | Painter | Massachusetts |
| 69 | Mary E. Donnelly | 35 | Wife | Housewife | Massachusetts |
| 70 | Joseph L. Donnelly | 17 | Son | Student | Massachusetts |
| 71 | James Donnelly THIS PERSON | 15 | Son | Student | Massachusetts |
| 72 | Michael W. Donnelly | 11 | Son | — | Massachusetts |
| 73 | Paul R. Donnelly | 9 | Son | — | Massachusetts |
| 74 | Blanche Donnelly | 3 | Daughter | — | Massachusetts |
| 75 | Annie Knox | 60 | Head | Housewife | Scotland |
| 76 | Ernest White | 40 | Head | Chef | Oregon |
| 77 | Beatrice White | 32 | Wife | Housewife | Canada English |
| 78 | Evelyn White | 9 | Daughter | — | Massachusetts |
| 79 | June White | 8 | Daughter | — | Massachusetts |
| 80 | Caroline White | 6 | Daughter | — | 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)