ED
Edward Duffy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Edward Duffy across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Joseph & Joseph — first a head (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Duffy |
| Given Name | Edward |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | fireman |
| Industry | outside city |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2208 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Fireman |
| Township / Ward | Boston City |
| Est. Birth Year | ~1917 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Edward | Age | Birth yr |
|---|---|---|---|---|
| Doris Duffy | Daughter | — | 10 | ~1930 |
| Francis Duffy | Son | — | 12 | ~1928 |
| Edward Duffy | Head | — | 23 | ~1917 |
| Elizabeth Duffy | Spouse | — | 22 | ~1918 |
| Marguerite Duffy | Daughter | — | 13 | ~1927 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 2
Suffolk, Massachusetts · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Edward F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | England |
| Mother Tongue | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Son, age 12
Suffolk, Massachusetts · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Edward |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Head, age 23
Suffolk-County, Massachusetts · implied b. ~1917 — 5 household members
| Surname | Duffy |
| Given Name | Edward |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Occupation | fireman |
| Industry | outside city |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2208 |
| 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 Edward Duffy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joseph Duffy (~0.92 confidence) and father Joseph Duffy (~0.92 confidence) and mother Pauline Duffy (~0.92 confidence) and mother Pauline Duffy (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Duffy
b. ~1891
Source father
● Household
· direct · ~0.92
Father
Joseph Duffy
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Pauline Duffy
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Pauline Duffy
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Edward Duffy
Head · 1940 · age 23 · b. ~1917 · Massachusetts
★ You are viewing this record
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-t0627-01657-00279)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mildred F Mclean | 46 | Head | — | Massachusetts |
| 2 | Francis Mclean | 17 | Daughter | — | Massachusetts |
| 3 | Barbara A Mclean | 15 | Daughter | — | Massachusetts |
| 4 | Harold P Mclean | 33 | Lodger | Fireman | Massachusetts |
| 5 | William J Riley | 72 | Head | — | Massachusetts |
| 6 | Annie J Riley | 72 | Wife | — | Massachusetts |
| 7 | Nicholas F Leonard | 58 | Head | Manager | Massachusetts |
| 8 | Esther J Leonard | 58 | Wife | — | Massachusetts |
| 9 | Esther Leonard | 29 | Daughter | Librarian | Massachusetts |
| 10 | Mary M Leonard | 23 | Daughter | Typist | Massachusetts |
| 11 | Joseph W Leonard | 19 | Son | New Worker | Massachusetts |
| 12 | Daniel D Keating | 55 | Lodger | Laborer | Massachusetts |
| 13 | Charles W Clayton | 47 | Head | — | Massachusetts |
| 14 | Nora M Clayton | 45 | Wife | — | Massachusetts |
| 15 | Constance M Clayton | 22 | Daughter | — | Massachusetts |
| 16 | Mary C Mccormick | 62 | Head | — | Canada Eng |
| 17 | Raymond E Mccormick | 24 | Son | Salesman | Massachusetts |
| 18 | Ann C Campbell | 25 | Niece | Laborer | Massachusetts |
| 19 | Fred Rowe | 49 | Head | Repairman | Massachusetts |
| 20 | George H Rowe | 82 | Father | — | New York |
| 21 | Earl L Newman | 70 | Head | — | Sweden |
| 22 | John H Newman | 28 | Son | Mechanic | Massachusetts |
| 23 | William F Harrington | 70 | Head | — | Maine |
| 24 | Sadie Harrington | 52 | Wife | Stitcher | Canada Eng |
| 25 | Charles W Harrington | 22 | Son | Salesman | Massachusetts |
| 26 | Earl Harrington | 16 | Son | New Worker | Massachusetts |
| 27 | Luigi Cambria | 56 | Head | Carpenter | Italy |
| 28 | Mary Cambria | 54 | Wife | — | Italy |
| 29 | Mary Cambria | 31 | Daughter | — | Massachusetts |
| 30 | Ellen C Storin | 55 | Head | — | Eire |
| 31 | Bertha A Storin | 29 | Daughter | Stenographer | Massachusetts |
| 32 | George W Storin | 23 | Son | Salesman | Massachusetts |
| 33 | Edward Duffy THIS PERSON | 23 | Head | Fireman | Massachusetts |
| 34 | Elizabeth Duffy | 22 | Wife | — | Maine |
| 35 | Marguerite Duffy | 13 | Daughter | — | Massachusetts |
| 36 | Francis Duffy | 12 | Son | — | Massachusetts |
| 37 | Doris Duffy | 10 | Daughter | — | Massachusetts |
| 38 | John J Burns | 57 | Head | Guard | Eire |
| 39 | Patrick Burns | 33 | Son | Laborer | Eire |
| 40 | Edward Burns | 29 | Son | Laborer | Massachusetts |
Pedigree Summary
Edward
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)