WM
William Mclaughlin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this William Mclaughlin across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1916), then head of a 9-person household.
Age 24
b. ~1916
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | McLaughlin |
| Given Name | William A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| Additional Details | |
| Occupation | chocolate factory |
| Industry | PW |
| Class of Worker | 1300 |
| Highest Grade | H-4 |
| 1935 Residence | 40 |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Chocolate Factory |
| Township / Ward | Boston City |
| Est. Birth Year | ~1916 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| John Mclaughlin | Son | — | 26 | ~1914 |
| Mary Mclaughlin | Daughter | — | 17 | ~1923 |
| Annie Mclaughlin | Spouse | — | 50 | ~1890 |
| William Mclaughlin | Son | — | 24 | ~1916 |
| Michael Mclaughlin | Head | — | 51 | ~1889 |
| Alfred Mclaughlin | Son | — | 15 | ~1925 |
| Lorraine Mclaughlin | Daughter | — | 10 | ~1930 |
| Francis Mclaughlin | Son | — | 19 | ~1921 |
| Thomas Mclaughlin | Son | — | 12 | ~1928 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 13
Suffolk, Massachusetts · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McLaughlin |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Am. Island |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 24
Suffolk-County, Massachusetts · implied b. ~1916 — 9 household members
| Surname | McLaughlin |
| Given Name | William A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| Occupation | chocolate factory |
| Industry | PW |
| Class of Worker | 1300 |
| Highest Grade | H-4 |
| 1935 Residence | 40 |
| 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 Mclaughlin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Mclaughlin
Son · 1940 · age 24 · b. ~1916 · Massachusetts
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Sibling
Thomas Mclaughlin
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mclaughlin
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lorraine Mclaughlin
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfred Mclaughlin
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mclaughlin
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Mclaughlin
Sibling · 1940 · age 19
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-t0627-01659-00100)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Martha R. Mahoney | 64 | Wife | — | Massachusetts |
| 2 | Helen V. Mahoney | 37 | Daughter | Suffolk County Court | Massachusetts |
| 3 | Merrill Babcock | 48 | Head | Boats | Massachusetts |
| 4 | Monica Babcock | 32 | Wife | — | Massachusetts |
| 5 | John B. Lombard | 48 | Head | Own Business | Massachusetts |
| 6 | Gertrude S. Lombard | 47 | Wife | — | Massachusetts |
| 7 | John P. Lombard | 19 | Son | — | Massachusetts |
| 8 | Alice Mccormack | 73 | Head | — | Massachusetts |
| 9 | John A. Wise | 48 | Head | Navy Dept. | Massachusetts |
| 10 | Lucy M. Wise | 51 | Sister | Navy Dept. | Massachusetts |
| 11 | Josephine E. Wise | 43 | Sister | Western Co. | Massachusetts |
| 12 | Michael J. Mclaughlin | 51 | Head | Boston Fire Dept. | Massachusetts |
| 13 | Annie M. Mclaughlin | 50 | Wife | — | Massachusetts |
| 14 | John Mclaughlin | 26 | Son | Navy Yard | Massachusetts |
| 15 | William A. Mclaughlin THIS PERSON | 24 | Son | Chocolate Factory | Massachusetts |
| 16 | Francis Mclaughlin | 19 | Son | Navy Yard | Massachusetts |
| 17 | Mary R. Mclaughlin | 17 | Daughter | — | Massachusetts |
| 18 | Alfred B. Mclaughlin | 15 | Son | — | Massachusetts |
| 19 | Thomas E. Mclaughlin | 12 | Son | — | Massachusetts |
| 20 | Lorraine A. Mclaughlin | 10 | Daughter | — | Massachusetts |
| 21 | Timothy E. Dwyer | 39 | Head | Chain Store | Massachusetts |
| 22 | Julia Dwyer | 43 | Wife | — | Eire |
| 23 | Marie Dwyer | 9 | Daughter | — | Massachusetts |
| 24 | Edward Dwyer | 7 | Son | — | Massachusetts |
| 25 | Joseph Foley | 35 | Boarder | Broom Factory | Eire |
| 26 | Catherine Mcgreer | 55 | Head | — | Northern Ireland |
| 27 | John Mcgreer | 27 | Son | Steamship | Massachusetts |
| 28 | George Mcgreer | 25 | Son | Railroad | Massachusetts |
| 29 | Cornelius Mcgreer | 23 | Son | Dept. Store | Massachusetts |
| 30 | Patrick Mcgreer | 22 | Son | Hospital | Massachusetts |
| 31 | George W. Crawford | 34 | Head | Roofing Insulation | Massachusetts |
| 32 | Mary Crawford | 32 | Wife | — | Massachusetts |
| 33 | Mary Crawford | 13 | Daughter | — | Massachusetts |
| 34 | Rosalie Crawford | 10 | Daughter | — | Massachusetts |
| 35 | George Crawford | 8 | Son | — | Massachusetts |
| 36 | Elizabeth Crawford | 2 | Daughter | — | Massachusetts |
| 37 | Mary Crawford | 70 | Head | — | Massachusetts |
| 38 | Grace Catherine Crawford | 36 | Daughter | Law Office | Massachusetts |
| 39 | Albert Crawford | 36 | Son-in-law | Boat | England |
| 40 | Dennis W. O'Neill | 65 | Head | Waterfront | 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)