JM
John Mcdonough — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Mcdonough across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1918), then head of a 9-person household.
Age 22
b. ~1918
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | McDonough |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Welder |
| Industry | John Kennedy |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1127 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Welder |
| Township / Ward | Boston |
| Est. Birth Year | ~1918 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Helen Mcdonough | Daughter | — | 14 | ~1926 |
| Margaret Mcdonough | Daughter | — | 11 | ~1929 |
| Mary Mcdonough | Daughter | — | 16 | ~1924 |
| Terrance Mcdonough | Head | — | 55 | ~1885 |
| Peter Mcdonough | Son | — | 20 | ~1920 |
| John Mcdonough | Son | — | 22 | ~1918 |
| Walter Mcdonough | Son | — | 12 | ~1928 |
| Thomas Mcdonough | Son | — | 17 | ~1923 |
| Mary Mcdonough | Spouse | — | 53 | ~1887 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 12
Suffolk, Massachusetts · implied b. ~1918 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonough |
| Given Name | John J |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Age at First Marriage | 12 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 22
Suffolk-County, Massachusetts · implied b. ~1918 — 9 household members
| Surname | McDonough |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Welder |
| Industry | John Kennedy |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1127 |
| Highest Grade | No 4 |
| 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 John Mcdonough across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mcdonough
Son · 1940 · age 22 · b. ~1918 · Massachusetts
★ You are viewing this record
Sibling
Thomas Mcdonough
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Mcdonough
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Peter Mcdonough
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mcdonough
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Mcdonough
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mcdonough
Sibling · 1940 · age 16
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-t0627-01664-00748)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frank Logan | 41 | Head | Chauffer | Massachusetts |
| 42 | Francis P. Logan | 39 | Head | Chauffer | Massachusetts |
| 43 | Helen Logan | 26 | Wife | — | Massachusetts |
| 44 | Francis Jr. Logan | 9 | Son | — | Massachusetts |
| 45 | Helen Logan | 8 | Daughter | — | Massachusetts |
| 46 | Virginia Logan | 6 | Daughter | — | Massachusetts |
| 47 | Donald Logan | 5 | Son | — | Massachusetts |
| 48 | David J. Buckley | 46 | Brother-in-law | Longshoreman | Massachusetts |
| 49 | Albert Malcolm | 63 | Head | Displayer | Massachusetts |
| 50 | Elizabeth Malcolm | 59 | Wife | — | Massachusetts |
| 51 | Edna Malcolm | 27 | Daughter | Addre. Machine Operator | Massachusetts |
| 52 | Albert Jr. Malcolm | 24 | Son | New Worker | Massachusetts |
| 53 | Walter Malcolm | 22 | Son | Bookkeeper | Massachusetts |
| 54 | Charles M. Schumann | 45 | Head | Foreman | Massachusetts |
| 55 | Helen M. Schumann | 33 | Wife | — | Massachusetts |
| 56 | Terrance Mcdonough | 55 | Head | Laborer | Eire |
| 57 | Mary Mcdonough | 53 | Wife | — | Eire |
| 58 | John J. Mcdonough THIS PERSON | 22 | Son | Welder | Massachusetts |
| 59 | Peter Mcdonough | 20 | Son | Grinder | Massachusetts |
| 60 | Thomas Mcdonough | 17 | Son | — | Massachusetts |
| 61 | Mary Mcdonough | 16 | Daughter | — | Massachusetts |
| 62 | Helen Mcdonough | 14 | Daughter | — | Massachusetts |
| 63 | Walter Mcdonough | 12 | Son | — | Massachusetts |
| 64 | Margaret Mcdonough | 11 | Daughter | — | Massachusetts |
| 65 | John Nagle | 49 | Head | 1St Asst. Mail Man | Massachusetts |
| 66 | Mary Nagle | 45 | Sister | Bookkeeper | Massachusetts |
| 67 | Catherine Browns | 61 | Sister | Clerk | Massachusetts |
| 68 | Mary Browns | 24 | Niece | Stenographer | Massachusetts |
| 69 | Catherine Dowling | 62 | Head | — | Massachusetts |
| 70 | Marian Dowling | 32 | Daughter | Saleslady | Massachusetts |
| 71 | Leo Dowling | 30 | Son | Underwriter | Massachusetts |
| 72 | Agnes Dowling | 28 | Daughter | Packer | Massachusetts |
| 73 | Mildred Dowling | 26 | Daughter | Saleslady | Massachusetts |
| 74 | William Dowling | 22 | Son | Mail Clerk | Massachusetts |
| 75 | Sanford H. Holbrook | 51 | Head | Electrician | Vermont |
| 76 | Agnes Holbrook | 50 | Wife | — | Massachusetts |
| 77 | Thomas Holbrook | 19 | Son | — | Massachusetts |
| 78 | Ellen Murphy | 57 | Lodger | Stitcher | Eire |
| 79 | Charles Graham | 31 | Head | Truck Chauffer | Massachusetts |
| 80 | Emma Graham | 27 | Wife | — | 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)