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Mary Boyd — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Boyd across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Isaac & Lillian — first a daughter (b.~1917), then head of a 4-person household.
Age 23
b. ~1917
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Boyd |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | typist |
| Industry | Private |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Typist |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Lillian Boyd | Daughter | — | 25 | ~1915 |
| Mary Boyd | Daughter | — | 23 | ~1917 |
| Bartholomew Boyd | Head | — | 46 | ~1894 |
| Lillian Boyd | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Suffolk, Massachusetts
Daughter, age 1
Suffolk, Massachusetts · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Boyd |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Daughter, age 12
Suffolk, Massachusetts · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Boyd |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| 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
Daughter, age 23
Suffolk-County, Massachusetts · implied b. ~1917 — 4 household members
| Surname | Boyd |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | typist |
| Industry | Private |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| 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 Boyd across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Isaac Boyd (~0.92 confidence) and mother Lillian Boyd (~0.92 confidence) and mother Helen Boyd (~0.92 confidence) and mother Mary Boyd (~0.92 confidence) and father Bartholomew Boyd (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Isaac Boyd
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Lillian Boyd
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Helen Boyd
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Mary Boyd
b. ~1891
Source mother
● Household
· direct · ~0.92
Father
Bartholomew Boyd
b. ~1894
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Boyd
Daughter · 1940 · age 23 · b. ~1917 · Massachusetts
★ You are viewing this record
Sibling
Lillian Boyd
Sibling · 1940 · age 25
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-t0627-01659-00164)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marion July | 11 | daughter | — | Massachusetts |
| 42 | Charles Tuttle | 21 | brother-in-law | Laborer | Massachusetts |
| 43 | John J. Sullivan | 57 | Head | Inspector | Massachusetts |
| 44 | Elizabeth Sullivan | 51 | wife | — | Massachusetts |
| 45 | Janet L. Sullivan | 29 | daughter | Script Writer | Massachusetts |
| 46 | Elizabeth A. Sullivan | 28 | daughter | Clerk | Massachusetts |
| 47 | Rose Marie Sullivan | 14 | daughter | — | Massachusetts |
| 48 | Gertrude Randall | 58 | Head | — | Massachusetts |
| 49 | John W. Long | 54 | Head | — | Massachusetts |
| 50 | Ellen C. Long | 87 | aunt | — | Massachusetts |
| 51 | James Rowan | 68 | Head | — | Massachusetts |
| 52 | Catherine Dugan | 45 | housekeeper | Private Family | Massachusetts |
| 53 | Steven Hagerty | 61 | Head | Watchman | Ireland |
| 54 | Catherine Hagerty | 59 | wife | — | Ireland |
| 55 | Joseph Hagerty | 23 | son | Attendant | Massachusetts |
| 56 | Rita Hagerty | 22 | daughter | Insurance Clerk | Massachusetts |
| 57 | Helen Hagerty | 20 | daughter | Clerk | Massachusetts |
| 58 | Dorothy Hagerty | 18 | daughter | — | Massachusetts |
| 59 | Michael Neely | 40 | roomer | Laborer | Ireland |
| 60 | Edith James | 48 | Head | Flour Packer | Maine |
| 61 | George Ricker | 27 | Head | Watchman | Massachusetts |
| 62 | Eleanor Ricker | 26 | wife | — | Massachusetts |
| 63 | Thomas Jr. Ricker | 4 | son | — | Massachusetts |
| 64 | Eleanor Ricker | 3 | daughter | — | Massachusetts |
| 65 | Allan Harrower | 57 | Head | Wood Carver | Scotland |
| 66 | — | None | — | — | — |
| 67 | Bartholomew Boyd | 46 | Head | Cashier | Massachusetts |
| 68 | Lillian Boyd | 52 | wife | — | Massachusetts |
| 69 | Lillian Boyd | 25 | daughter | Typist | Massachusetts |
| 70 | Mary Boyd THIS PERSON | 23 | daughter | Typist | Massachusetts |
| 71 | John O'Brien | 33 | Head | Meat Cutter | Ireland |
| 72 | Mary O'Brien | 35 | wife | — | Ireland |
| 73 | Mary O'Brien | 5 | daughter | — | Massachusetts |
| 74 | John O'Brien | 0 | son | — | Massachusetts |
| 75 | Alex Jarasitis | 29 | Head | Helper | Massachusetts |
| 76 | Dorothy Jarasitis | 29 | wife | — | Massachusetts |
| 77 | Allen Jarasitis | 1 | son | — | Massachusetts |
| 78 | Infant Jarasitis | 0 | daughter | — | Massachusetts |
| 79 | William Shelton | 38 | Head | Laborer | Massachusetts |
| 80 | Beatrice Shelton | 39 | wife | — | Massachusetts |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 5 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)