MF
Mary Fitzpatrick — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Fitzpatrick across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Emma & Patrick — first a daughter (b.~1905), then head of a 2-person household.
Age 35
b. ~1905
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Fitzpatrick |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Saleswoman |
| Industry | Retail Candy Store |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 736 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Saleswoman |
| Township / Ward | Somerville |
| Est. Birth Year | ~1905 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Fitzpatrick | Daughter | — | 35 | ~1905 |
| Helena Fitzpatrick | Head | — | 58 | ~1882 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 15
Middlesex, Massachusetts · implied b. ~1905 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzpatrick |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 25
Middlesex, Massachusetts · implied b. ~1905 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzpatrick |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Saleslady |
| Industry | News stand |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 35
Middlesex-County, Massachusetts · implied b. ~1905 — 2 household members
| Surname | Fitzpatrick |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville |
| 1935 Residence (County) | Middlesex |
| Occupation | Saleswoman |
| Industry | Retail Candy Store |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 736 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| 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 Fitzpatrick across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Emma Fitzpatrick (~0.92 confidence) and father Patrick Fitzpatrick (~0.92 confidence) and mother Helena Fitzpatrick (~0.92 confidence) and mother Teresa Fitzpatrick (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Emma Fitzpatrick
b. ~1874
Source mother
● Household
· direct · ~0.92
Father
Patrick Fitzpatrick
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Helena Fitzpatrick
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Teresa Fitzpatrick
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Fitzpatrick
Daughter · 1940 · age 35 · b. ~1905 · 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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01702-00538)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Isabel Yates | 5 | Daughter | — | Massachusetts |
| 42 | Robert Yates | 2 | Son | — | Massachusetts |
| 43 | Mary A. Sullivan | 37 | Head | Practical Nurse | Massachusetts |
| 44 | Mary Sullivan | 12 | Daughter | — | Massachusetts |
| 45 | Geraldine Sullivan | 7 | Daughter | — | Massachusetts |
| 46 | John A. Wedge | 28 | Head | Salesman | Canada-French |
| 47 | Margaret Q. Wedge | 40 | Wife | — | Eire |
| 48 | Mary M. Wedge | 24 | Daughter | File Clerk | Massachusetts |
| 49 | Mildred M. Wedge | 11 | Daughter | — | Massachusetts |
| 50 | Mary Mcgrath | 69 | Mother-in-law | — | Eire |
| 51 | Ray C. B. Haderstotz | 64 | Head | Sales Clerk | Czechoslovakia |
| 52 | Sophie T. Haderstotz | 62 | Sister | Cashier | Czechoslovakia |
| 53 | Domingos Ferreria | 41 | Head | Machine Operator | Portugal |
| 54 | Mary E. Ferreria | 38 | Wife | Dressmaker | Portugal |
| 55 | Dorothy Ferreria | 17 | Daughter | — | Massachusetts |
| 56 | William Ferreria | 15 | Son | — | Massachusetts |
| 57 | John J. Halloran | 53 | Head | Glazer | Massachusetts |
| 58 | Mary L. G. Halloran | 48 | Wife | — | Massachusetts |
| 59 | Evelyn L. Halloran | 24 | Daughter | Saleswoman | Massachusetts |
| 60 | John J. Halloran | 22 | Son | Shipping Clerk | Massachusetts |
| 61 | James Halloran | 16 | Son | — | Massachusetts |
| 62 | Helen Halloran | 16 | Daughter | — | Massachusetts |
| 63 | Helena F. Fitzpatrick | 58 | Head | — | Massachusetts |
| 64 | Mary L. Fitzpatrick THIS PERSON | 35 | Daughter | Saleswoman | Massachusetts |
| 65 | Anthony S. Grace | 44 | Head | Watchman | Portugal |
| 66 | Helena G. Grace | 41 | Wife | Looper | Massachusetts |
| 67 | Helen Grace | 19 | Daughter | Assembling Girl | Massachusetts |
| 68 | Violet Grace | 15 | Daughter | — | Massachusetts |
| 69 | Frances M. Barrett | 61 | Sister-in-law | — | Portugal |
| 70 | Robert D. Daly | 63 | Head | Supervisor | Eire |
| 71 | Honora J. Daly | 59 | Wife | — | Eire |
| 72 | Emil K. Verney | 55 | Head | Laborer | Massachusetts |
| 73 | Mary Verney | 57 | Wife | — | Canada-French |
| 74 | Henry Verney | 17 | Son | New Worker | Massachusetts |
| 75 | Manual Corria | 38 | Head | — | Portugal |
| 76 | Evangeline Corria | 17 | Daughter | Dipper | Portugal |
| 77 | Cornelius W. Stynes | 71 | Head | — | Massachusetts |
| 78 | Marjorie M. Stynes | 45 | Daughter | File Clerk | Massachusetts |
| 79 | Grace S. Stynes | 33 | Daughter | Bookkeeper | Massachusetts |
Pedigree Summary
Mary
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)