WM
William Madden — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this William Madden across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 6-person household.
Age 10
b. ~1930
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Madden |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1930 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Madden | Head | — | 43 | ~1897 |
| Mary Madden | Daughter | — | 4 | ~1936 |
| Anne Madden | Spouse | — | 35 | ~1905 |
| Barbara Madden | Daughter | — | 7 | ~1933 |
| William Madden | Son | — | 10 | ~1930 |
| Eugenia Madden | Daughter | — | 8 | ~1932 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age
Suffolk, Massachusetts · implied b. ~1930 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Madden |
| Given Name | William F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 10
Suffolk-County, Massachusetts · implied b. ~1930 — 6 household members
| Surname | Madden |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| 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 William Madden across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Madden
Son · 1940 · age 10 · b. ~1930 · Massachusetts
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Sibling
Mary Madden
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugenia Madden
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Madden
Sibling · 1940 · age 7
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
38 people indexed on this census page (nara:1940:m-t0627-01669-00595)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William J. Jr. Sennott | 21 | Son | Shipper | Massachusetts |
| 42 | J. Warren Sennott | 14 | Son | — | Massachusetts |
| 43 | Dorothy A. Sennott | 25 | Daughter | — | Massachusetts |
| 44 | Michael Gorman | 25 | Head | — | Irish Free State |
| 45 | Mary Gorman | 25 | Wife | — | Irish Free State |
| 46 | William H. Madden | 43 | Head | Pharmacist | Massachusetts |
| 47 | Anne Madden | 35 | Wife | — | Massachusetts |
| 48 | William Madden THIS PERSON | 10 | Son | — | Massachusetts |
| 49 | Eugenia Madden | 8 | Daughter | — | Massachusetts |
| 50 | Barbara Madden | 7 | Daughter | — | Massachusetts |
| 51 | Mary E. Madden | 4 | Daughter | — | Massachusetts |
| 52 | James J. Timons | 34 | Head | Chauffeur | Massachusetts |
| 53 | Louise Timons | 33 | Wife | — | Massachusetts |
| 54 | John Timons | 8 | Son | — | Massachusetts |
| 55 | Louise Timons | 11 | Daughter | — | Massachusetts |
| 57 | Mary E. English | 65 | Head | — | Pennsylvania |
| 58 | William Chris | 65 | Caretaker | Caretaker | New Hampshire |
| 59 | Violet L. Cross | 59 | Head | — | Canada Eng |
| 60 | Gladys E. Cross | 33 | Daughter | Dental Assistant | Massachusetts |
| 61 | Howard Wellons | 48 | Head | Teacher | Massachusetts |
| 62 | Mildred Wellons | 45 | Wife | — | Massachusetts |
| 64 | Joseph P. Hubbard | 70 | Head | Stock Clerk | Massachusetts |
| 65 | Catherine A. Hubbard | 68 | Wife | — | Massachusetts |
| 66 | Mary G. Hubbard | 32 | Daughter | Teacher | Massachusetts |
| 67 | Patrick J. Keane | 42 | Head | Police Officer | Irish Free State |
| 68 | Helen Keane | 41 | Wife | — | Irish Free State |
| 69 | Helen T. Keane | 6 | Daughter | — | Massachusetts |
| 70 | Mary Keane | 4 | Daughter | — | Massachusetts |
| 71 | Mclaughlin | 58 | Head | — | Irish Free State |
| 72 | Joseph J. Mclaughlin | 33 | Son | Secretary | Massachusetts |
| 73 | Catherine A. Mclaughlin | 32 | Daughter | Secretary | Massachusetts |
| 74 | Teresa V. Mclaughlin | 28 | Daughter | Typist | Massachusetts |
| 75 | James J. Fennessy | 39 | Head | Police Officer | Massachusetts |
| 76 | Elizabeth Fennessy | 39 | Wife | — | Massachusetts |
| 77 | James Fennessy | 5 | Son | — | Massachusetts |
| 78 | Francis Fennessy | 3 | Son | — | Massachusetts |
| 79 | Mary Fennessy | 9 | Daughter | — | Massachusetts |
| 80 | Katherine Fennessy | 7 | 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)