MH
Mary Hayes — 1940 US Census Record
Model Tree available1940 United States Federal Census · Merrimack-County, New Hampshire
Our Model Tree links this Mary Hayes across the 1910, 1920, 1930 and 1940 US Censuses in Merrimack-County, New Hampshire (XGBoost, ~Confirmed), with identified parents Michael & Annie — first a daughter (b.~1890), then head of a 4-person household.
Age 50
b. ~1890
Female
Daughter
Born: New Hampshire
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Merrimack-County, New Hampshire |
| Surname | Hayes |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Concord city |
| 1935 Residence (County) | Merrimack |
| Additional Details | |
| Industry | 0 |
| Class of Worker | 0 |
| Highest Grade | H4 |
| 1935 Residence | Same Place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
| Township / Ward | Concord City |
| Est. Birth Year | ~1890 |
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 |
|---|---|---|---|---|
| Charlotte Hayes | Daughter | — | 40 | ~1900 |
| Mary Hayes | Daughter | — | 50 | ~1890 |
| Abbie Hayes | Head | — | 70 | ~1870 |
| Harry Taylor | Other | — | 75 | ~1865 |
Census Appearances
1910
Merrimack, New …
Other, age 26
Merrimack, New Hampshire · implied b. ~1884 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hayes |
| Given Name | Mary C. |
| Relationship to Head | Housekeeper |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New Hampshire |
| Occupation | Housekeeper |
| Industry | Private family |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1920
Merrimack, New …
Other, age 35
Merrimack, New Hampshire · implied b. ~1885 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hayes |
| Given Name | Mary E. |
| Relationship to Head | Servant |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New Hampshire |
| Occupation | Servant |
| Industry | Private Family |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1930
Merrimack, New …
Daughter, age 45
Merrimack, New Hampshire · implied b. ~1885 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hayes |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New Hampshire |
| Occupation | House work |
| Industry | Private Family |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1940
Merrimack-County, New …
Daughter, age 50
Merrimack-County, New Hampshire · implied b. ~1890 — 4 household members
| Surname | Hayes |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Concord city |
| 1935 Residence (County) | Merrimack |
| Industry | 0 |
| Class of Worker | 0 |
| Highest Grade | H4 |
| 1935 Residence | Same Place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
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 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Michael Hayes (~0.92 confidence) and mother Annie Hayes (~0.92 confidence) and mother Abbie Hayes (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Michael Hayes
b. ~1853
Source father
● Household
· direct · ~0.92
Mother
Annie Hayes
b. ~1859
Source mother
● Household
· direct · ~0.92
Mother
Abbie Hayes
b. ~1870
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Hayes
Daughter · 1940 · age 50 · b. ~1890 · New Hampshire
★ You are viewing this record
Sibling
Charlotte Hayes
Sibling · 1940 · age 40
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 — Merrimack-County, New Hampshire
Open full size
1940 US Federal Census — Merrimack-County, New Hampshire
Page Contents
18 people indexed on this census page (nara:1940:m-t0627-02293-00778)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 31 | Nelia L. Badger | 78 | Head | — | Vermont |
| 32 | Delma L. Whittney | 58 | Lodger | Servant | New Hampshire |
| 33 | Frank Ordway | 64 | Head | Painter | New Hampshire |
| 34 | Annie Kennedy | 42 | Sister | Nurse | New Hampshire |
| 35 | Price Mildred | 17 | Lodger | — | New Hampshire |
| 36 | Abbie E. Hayes | 70 | Head | — | New Hampshire |
| 37 | Mary E. Hayes THIS PERSON | 50 | Daughter | — | New Hampshire |
| 38 | Charlotte Hayes | 40 | Daughter | Operator | New Hampshire |
| 39 | Harry E. Taylor | 75 | Lodger | Clerk | New Hampshire |
| 40 | Clarence Gray | 24 | Head | Helper | New Hampshire |
| 41 | Thelma Gray | 24 | Wife | — | New Hampshire |
| 42 | Marilyn Gray | 4 | Daughter | — | New Hampshire |
| 43 | Alan Gray | 2 | Son | — | New Hampshire |
| 44 | Robert Hicks | 21 | Lodger | Laborer | New Hampshire |
| 45 | Lorin Kennedy | 33 | Head | Attendant | New Hampshire |
| 46 | Theresa Kennedy | 31 | Wife | — | New Hampshire |
| 47 | Audrey Kennedy | 11 | Daughter | — | New Hampshire |
| 74 | George Jr. Thurber | 36 | Lodger | Laborer | New Hampshire |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 3 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)