DM
David Murphy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this David Murphy across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 8-person household.
Age 21
b. ~1919
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Murphy |
| Given Name | David A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Clerk |
| Industry | Standard Oil |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 780 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Clerk |
| Township / Ward | Boston |
| Est. Birth Year | ~1919 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to David | Age | Birth yr |
|---|---|---|---|---|
| Catherine Murphy | Head | — | 57 | ~1883 |
| Margaret Murphy | Daughter | — | 16 | ~1924 |
| Helen Murphy | Daughter | — | 23 | ~1917 |
| Thomas Murphy | Son | — | 13 | ~1927 |
| Richard Murphy | Son | — | 15 | ~1925 |
| David Murphy | Son | — | 21 | ~1919 |
| William Murphy | Son | — | 18 | ~1922 |
| Francis Murphy | Son | — | 24 | ~1916 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 11
Suffolk, Massachusetts · implied b. ~1919 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Murphy |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 21
Suffolk-County, Massachusetts · implied b. ~1919 — 8 household members
| Surname | Murphy |
| Given Name | David A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Clerk |
| Industry | Standard Oil |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 780 |
| Highest Grade | H-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 David Murphy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
David Murphy
Son · 1940 · age 21 · b. ~1919 · Massachusetts
★ You are viewing this record
Sibling
Margaret Murphy
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Murphy
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Murphy
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Murphy
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Murphy
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Murphy
Sibling · 1940 · age 18
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-t0627-01665-00363)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Florence Pierris | 21 | Wife | Packer | Massachusetts |
| 42 | William Laubenstein | 41 | Head | Painter | Massachusetts |
| 43 | Mary Laubenstein | 42 | Wife | — | Massachusetts |
| 44 | Robert Laubenstein | 20 | Son | Orderly | Massachusetts |
| 45 | Charles Laubenstein | 19 | Son | New Worker | Massachusetts |
| 46 | Marie Laubenstein | 17 | Daughter | New Worker | Massachusetts |
| 47 | John Laubenstein | 13 | Son | — | Massachusetts |
| 48 | Claire Laubenstein | 12 | Daughter | — | Massachusetts |
| 49 | William Laubenstein | 11 | Son | — | Massachusetts |
| 50 | Mabel Reardon | 59 | Head | — | Massachusetts |
| 51 | Leo Reardon | 29 | Son | Laborer | Massachusetts |
| 52 | Helen Reardon | 30 | Daughter | Waitress | Massachusetts |
| 53 | Dorothy Reardon | 25 | Daughter | New Worker | Massachusetts |
| 54 | George A. O'Connor | 51 | Head | Laborer | Massachusetts |
| 55 | Anna M. O'Connor | 40 | Wife | — | Massachusetts |
| 56 | Mary O'Connor | 22 | Daughter | — | Massachusetts |
| 57 | Lillian O'Connor | 21 | Daughter | New Worker | Massachusetts |
| 58 | Agnes O'Connor | 17 | Daughter | — | Massachusetts |
| 59 | George A. O'Connor | 14 | Son | — | Massachusetts |
| 60 | John J. Clancy | 49 | Head | Painter | Massachusetts |
| 61 | Mary E. Clancy | 44 | Wife | — | Massachusetts |
| 62 | John James Clancy | 23 | Son | Packer | Massachusetts |
| 63 | Sara Williams | 79 | Head | — | England |
| 64 | George J. Williams | 45 | Son | Elevator Opr. | Massachusetts |
| 65 | Wilhelmina Laubenstein | 68 | Head | — | Germany |
| 66 | Charles Laubenstein | 42 | Son | Fireman | Massachusetts |
| 67 | Arthur Brissenden | 32 | Head | Mechanic | Massachusetts |
| 68 | Sophia Brissenden | 31 | Wife | — | Massachusetts |
| 69 | Dorothy Brissenden | 7 | Daughter | — | Massachusetts |
| 70 | William Brissenden | 6 | Son | — | Massachusetts |
| 71 | Catherine Murphy | 57 | Head | — | England |
| 72 | Francis E. Murphy | 24 | Son | Finisher | Massachusetts |
| 73 | Helen G. Murphy | 23 | Daughter | Saleslady | Massachusetts |
| 74 | David A. Murphy THIS PERSON | 21 | Son | Clerk | Massachusetts |
| 75 | William M. Murphy | 18 | Son | Clerk | Massachusetts |
| 76 | Margaret E. Murphy | 16 | Daughter | — | Massachusetts |
| 77 | Richard F. Murphy | 15 | Son | — | Massachusetts |
| 78 | Thomas J. Murphy | 13 | Son | — | Massachusetts |
| 79 | Stanley Grublin | 53 | Head | Tailor | Lithuania |
| 80 | Anna Grublin | 44 | Wife | — | Lithuania |
Related Census Records
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)