MH
Mary Hayes — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Hayes across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents James & Truman — first a spouse (b.~1916), then head of a 4-person household.
Age 24
b. ~1916
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Hayes |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | City of Newton |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | City Of Newton |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Norman Hayes | Head | — | 26 | ~1914 |
| Robert Degeorge | Other | — | 18 | ~1922 |
| Robert Hayes | Son | — | ~1940 | |
| Mary Hayes | Spouse | — | 24 | ~1916 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 1
Middlesex, Massachusetts · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hayes |
| 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 | Ireland |
| Mother Tongue | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 12
Middlesex, Massachusetts · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hayes |
| 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
Middlesex-County, Massachusetts
Spouse, age 24
Middlesex-County, Massachusetts · implied b. ~1916 — 4 household members
| Surname | Hayes |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | City of Newton |
| 1935 Residence (County) | Middlesex |
| Income (1939) | 0 |
| 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 Hayes across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Hayes (~0.92 confidence) and father Truman Hayes (~0.92 confidence) and mother Nellie Hayes (~0.92 confidence) and mother Mabelle Hayes (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Hayes
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Truman Hayes
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Nellie Hayes
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Mabelle Hayes
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Hayes
Spouse · 1940 · age 24 · b. ~1916 · 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
40 people indexed on this census page (nara:1940:m-t0627-01616-00413)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles E. Burgess | 45 | Head | Paymaster | Massachusetts |
| 2 | Jessie M. Burgess | 47 | Wife | — | Massachusetts |
| 3 | Allen Burgess | 16 | Son | Attending School | Massachusetts |
| 4 | Howard Burgess | 13 | Son | Attending School | Massachusetts |
| 5 | Elizabeth J. Townsend | 87 | Mother-in-law | — | Maine |
| 6 | Charles E. Gasselyn | 68 | Head | Retired | Massachusetts |
| 7 | Alice Gasselyn | 62 | Wife | — | California |
| 8 | Sarah M. Harris | 75 | Lodger | — | Massachusetts |
| 9 | Louis Rogers | 34 | Head | Metal Worker | Massachusetts |
| 10 | Edna Rogers | 33 | Wife | Spotter | New York |
| 11 | George B. Hartop | 73 | Head | Janitor | England |
| 12 | Florence Hartop | 65 | Wife | — | Canada |
| 13 | Lawrence V. Morrison | 24 | Head | Shipper | Massachusetts |
| 14 | Celia Morrison | 23 | Wife | — | Massachusetts |
| 15 | Patricia Morrison | 0 | Daughter | — | Massachusetts |
| 16 | John G. Harris | 24 | Head | Photography | Illinois |
| 17 | Margaret Harris | 24 | Wife | Dept Store | Kansas |
| 18 | Juliana Harris | 3 | Daughter | — | Massachusetts |
| 19 | Norman J. Hayes | 26 | Head | Machinist | Massachusetts |
| 20 | Mary Hayes THIS PERSON | 24 | Wife | — | Massachusetts |
| 21 | Robert Hayes | 0 | Son | — | Massachusetts |
| 22 | Robert F. Degeorge | 18 | Brother-in-law | Painter | Massachusetts |
| 23 | Claude E. Swinwood | 54 | Head | Time Keeper | Minnesota |
| 24 | Gertrude Swinwood | 49 | Wife | — | Illinois |
| 25 | Earl H. Swinwood | 19 | Son | New Worker | Massachusetts |
| 26 | Charlotte Swinwood | 17 | Daughter | Attending School | Massachusetts |
| 27 | Eleanor Swinwood | 15 | Daughter | Attending School | Massachusetts |
| 28 | Mark Conroy | 72 | Head | Retired | Ireland |
| 29 | Mary Conroy | 66 | Wife | — | Ireland |
| 30 | Elizabeth Conroy | 36 | Daughter | — | Massachusetts |
| 31 | Herbert T. Conroy | 34 | Son | Agent | Massachusetts |
| 32 | Coleman Conroy | 32 | Son | Welder | Massachusetts |
| 33 | Joseph Conroy | 31 | Son | Clerk | Massachusetts |
| 34 | Martin Conroy | 25 | Son | Attending School | Massachusetts |
| 35 | Francis Conroy | 23 | Son | — | Massachusetts |
| 36 | Edward Cody | 48 | Head | Foreman | Massachusetts |
| 37 | Lillian Cody | 43 | Wife | — | Massachusetts |
| 38 | Dorothy Cody | 24 | Daughter | Operator | Massachusetts |
| 39 | John Cody | 19 | Son | Attending School | Massachusetts |
| 40 | Edward Cody | 14 | Son | Attending School | 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)