MM
Mary Mcmullen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Mcmullen across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1912), then head of a 7-person household.
Age 28
b. ~1912
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | McMullen |
| Given Name | Mary J. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | stenographer |
| Industry | Advertising Firm |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 956 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Stenographer |
| Township / Ward | Medford City |
| Est. Birth Year | ~1912 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Charles Mcmullen | Head | — | 58 | ~1882 |
| Mary Mcmullen | Daughter | — | 28 | ~1912 |
| Irene Mcmullen | Daughter | — | 17 | ~1923 |
| Catherine Mcmullen | Spouse | — | 54 | ~1886 |
| Pauline Mcmullen | Daughter | — | 24 | ~1916 |
| Joseph Mcmullen | Son | — | 23 | ~1917 |
| Rita Mcmullen | Daughter | — | 20 | ~1920 |
Census Appearances
1930
Middlesex, Massachusetts
Daughter, age 20
Middlesex, Massachusetts · implied b. ~1910 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMullen |
| Given Name | Mary A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Canada English |
| Occupation | Stenographer |
| Industry | Government Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 28
Middlesex-County, Massachusetts · implied b. ~1912 — 7 household members
| Surname | McMullen |
| Given Name | Mary J. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Occupation | stenographer |
| Industry | Advertising Firm |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 956 |
| 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 Mary Mcmullen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcmullen
Daughter · 1940 · age 28 · b. ~1912 · Massachusetts
★ You are viewing this record
Sibling
Joseph Mcmullen
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Mcmullen
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Irene Mcmullen
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Pauline Mcmullen
Sibling · 1940 · age 24
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01611-00314)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Everett E. Taylor | 43 | head | Clerk | Massachusetts |
| 42 | Marjorie D. Taylor | 38 | wife | — | Massachusetts |
| 43 | Marshall A. Taylor | 12 | son | — | Massachusetts |
| 44 | Frederick Fullery | 11 | nephew | — | Massachusetts |
| 45 | Carol L. Fullery | 7 | niece | — | Massachusetts |
| 46 | Newell J. Hare | 30 | head | Cut Man | Massachusetts |
| 47 | Evangeline M. Hare | 29 | wife | — | Canada French |
| 48 | Francis N. Hare | 7 | son | — | Massachusetts |
| 49 | Newelia J. Hare | 5 | daughter | — | Massachusetts |
| 50 | Patricia H. Hare | 3 | daughter | — | Massachusetts |
| 51 | Frank Costa | 74 | head | — | Italy |
| 52 | Margaret Costa | 63 | wife | — | Italy |
| 53 | John Costa | 29 | son | — | Massachusetts |
| 54 | Carl M. Turcotte | 40 | head | Dancer Teacher | New Hampshire |
| 55 | Gladys Turcotte | 33 | wife | Hostess | Canada English |
| 56 | Joseph N. Du Long | 26 | husband | Office Worker | Canada French |
| 57 | Mary E. Du Long | 27 | wife | — | Massachusetts |
| 58 | Robert J. Du Long | 3 | son | — | Massachusetts |
| 59 | Paul F. Du Long | 1 | son | — | Massachusetts |
| 60 | Edith J. Macsarty | 61 | head | — | Massachusetts |
| 61 | Charles J. Mcmullen | 58 | head | Bartender | Canada English |
| 62 | Catherine R. Mcmullen | 54 | wife | — | Irish Free State |
| 63 | Mary J. Mcmullen THIS PERSON | 28 | daughter | Stenographer | Massachusetts |
| 64 | Pauline V. Mcmullen | 24 | daughter | Cashier | Massachusetts |
| 65 | Joseph E. Mcmullen | 23 | son | Laborer | Massachusetts |
| 66 | Rita Mcmullen | 20 | daughter | New Worker | Massachusetts |
| 67 | Irene Mcmullen | 17 | daughter | — | Massachusetts |
| 68 | Fred C. Deloar | 65 | head | Private Taxi | Canada English |
| 69 | E. Evelyn Deloar | 26 | daughter | Music Teacher | Massachusetts |
| 70 | Luke B. Bresnahan | 60 | head | Plumbing Contractor | Massachusetts |
| 71 | Mary J. Bresnahan | 61 | wife | — | Massachusetts |
| 72 | Luke F. Bresnahan | 36 | son | Truck Helper | Massachusetts |
| 73 | Margaret M. Bresnahan | 18 | daughter | — | Massachusetts |
| 74 | Joseph C. English | 54 | head | Shipper | Massachusetts |
| 75 | Isabel H. English | 46 | wife | — | Massachusetts |
| 76 | Dorothy A. English | 18 | daughter | — | Massachusetts |
| 77 | Philip H. English | 16 | son | — | Massachusetts |
| 78 | Barbara H. English | 14 | daughter | Filing Clerk | Massachusetts |
| 79 | Rosemary A. English | 13 | daughter | — | Massachusetts |
| 80 | John W. English | 11 | son | — | 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)