JM
James Mullen — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this James Mullen across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents George & Henry — first a son (b.~1916), then head of a 5-person household.
Age 24
b. ~1916
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Mullen |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Draftsman |
| Industry | Housing Project W.P.A. Survey |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 450 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Draftsman |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Mullen | Son | — | 24 | ~1916 |
| John Mullen | Son | — | 22 | ~1918 |
| Matthew Mullen | Son | — | 20 | ~1920 |
| Thomas Mullen | Son | — | 18 | ~1922 |
| Mary Mullen | Head | — | 54 | ~1886 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 3
Middlesex, Massachusetts · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mullen |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 14
Middlesex, Massachusetts · implied b. ~1916 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mullin |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| 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 — 5 household members
| Surname | Mullen |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Draftsman |
| Industry | Housing Project W.P.A. Survey |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 450 |
| Highest Grade | Hs 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 James Mullen across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Mullin (~0.92 confidence) and father Henry Mullen (~0.92 confidence) and mother Clara Mullen (~0.92 confidence) and mother Mary Mullen (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Mullin
b. ~1892
Source father
● Household
· direct · ~0.92
Father
Henry Mullen
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Clara Mullen
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Mary Mullen
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Mullen
Son · 1940 · age 24 · b. ~1916 · Massachusetts
★ You are viewing this record
Sibling
Thomas Mullen
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Matthew Mullen
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mullen
Sibling · 1940 · age 22
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-t0627-01659-00504)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Albert Mcgonigal | 13 | Son | — | Massachusetts |
| 42 | Henry Mcgonigal | 31 | Head | Painter | Massachusetts |
| 43 | Margaret Mcgonigal | 31 | Wife | — | Massachusetts |
| 44 | Lillian Mcgonigal | 5 | Daughter | — | Massachusetts |
| 45 | Rose Ann Mcgonigal | 3 | Daughter | — | Massachusetts |
| 46 | Henry J. Mcgonigal | 2 | Son | — | Massachusetts |
| 47 | Mary E. Mullen | 54 | Head | — | Nova Scotia |
| 48 | James Mullen THIS PERSON | 24 | Son | Draftsman | Massachusetts |
| 49 | John M. Mullen | 22 | Son | Checker | Massachusetts |
| 50 | Matthew Mullen | 20 | Son | Soldier | Massachusetts |
| 51 | Thomas Mullen | 18 | Son | — | Massachusetts |
| 52 | Coleman P. Gill | 60 | Head | — | Massachusetts |
| 53 | Abbie F. Gill | 62 | Sister | — | Massachusetts |
| 54 | Catherine V. Gill | 53 | Sister | Bookkeeper | Massachusetts |
| 55 | Lambert Burk | 71 | Lodger | — | Germany |
| 56 | Hanora Flaherty | 71 | Head | — | Eire |
| 57 | Paul Flaherty | 30 | Son | Compositor | Massachusetts |
| 58 | Robert Jr. Flaherty | 32 | Son | Operator | Massachusetts |
| 59 | Helene Flaherty | 27 | Daughter in law | — | Massachusetts |
| 60 | Robert Jr. Flaherty | 2 | Grandson | — | Massachusetts |
| 61 | Elinor Flaherty | 0 | Grandchild | — | Massachusetts |
| 62 | Margaret M. O'Brien | 68 | Head | — | Wales |
| 63 | Daniel J. O'Brien | 41 | Son | — | Massachusetts |
| 64 | Thomas F. O'Brien | 38 | Son | Record Clerk | Massachusetts |
| 65 | Catherine O'Brien | 29 | Daughter | Typist | Massachusetts |
| 66 | Mary C. O'Brien | 24 | Daughter | — | Massachusetts |
| 67 | Ellen Doherty | 70 | Head | — | Massachusetts |
| 68 | Mary W. Coughlin | 61 | Head | Seamstress | Massachusetts |
| 69 | Mary Begley | 69 | Head | — | Eire |
| 70 | Joseph F. Begley | 42 | Son | Clerk | Massachusetts |
| 71 | Mary E. Begley | 40 | Daughter | Bookkeeper | Massachusetts |
| 72 | James L. Begley | 39 | Son | Lumper | Massachusetts |
| 73 | Patrick J. Byrnes | 45 | Head | Leading Man | Massachusetts |
| 74 | Catherine F. Byrnes | 44 | Wife | — | Massachusetts |
| 75 | William P. Byrnes | 18 | Son | — | Massachusetts |
| 76 | George P.B. Byrnes | 16 | Son | — | Massachusetts |
| 77 | Mary T. Byrnes | 14 | Daughter | — | Massachusetts |
| 78 | Patricia A. Byrnes | 11 | Daughter | — | Massachusetts |
| 79 | Gerard F. Byrnes | 6 | Son | — | Massachusetts |
| 80 | Nora E. Condon | 56 | Head | — | Massachusetts |
Pedigree Summary
James + 3 siblings
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)