MH
Mary Hardy — 1920 US Census Record
Model Tree available1920 United States Federal Census · Montgomery, Ohio
Our Model Tree links this Mary Hardy across the 1920, 1930 and 1940 US Censuses in Montgomery, Ohio (XGBoost, ~Confirmed), with identified parents Jane & Jane — first a daughter (b.~1868), then head of a 5-person household.
Age 52
b. ~1868
Female
Daughter
Born: Ohio
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Montgomery, Ohio |
| Surname | Hardy |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | England |
| Mother's Birthplace | Ohio |
| Additional Details | |
| Occupation | Assistant Secretary |
| Industry | Book register Mfg |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Assistant Secretary |
| Township / Ward | Dayton City |
| Est. Birth Year | ~1868 |
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.
5 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Nellie Hardy | Daughter | — | 54 | ~1866 |
| Mary Hardy | Daughter | — | 52 | ~1868 |
| Jane Hardy | Head | — | 76 | ~1844 |
| Charles Parker | Other | — | 31 | ~1889 |
| Lester Monroe | Other | — | 23 | ~1897 |
Census Appearances
1920
Montgomery, Ohio
Daughter, age 52
Montgomery, Ohio · implied b. ~1868 — 5 household members
| Surname | Hardy |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | England |
| Mother's Birthplace | Ohio |
| Occupation | Assistant Secretary |
| Industry | Book register Mfg |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Montgomery, Ohio
Daughter, age 62
Montgomery, Ohio · implied b. ~1868 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hardy |
| Given Name | Mayme A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 62 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | England |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Montgomery-County, Ohio
Other, age 72
Montgomery-County, Ohio · implied b. ~1868 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hardy |
| Given Name | Minnie |
| Relationship to Head | Sister |
| Sex | F |
| Color / Race | White |
| Age | 72 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Dayton City |
| 1935 Residence (County) | Montgomery |
| Occupation | Clerk |
| Industry | N. Cash Register |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Hardy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Jane Hardy (~0.92 confidence) and mother Jane Hardy (~0.50 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.71
Mother
Jane Hardy
b. ~1844
Source mother
● Household
· direct · ~0.92
Mother
Jane Hardy
b. ~1895
Source mother
● Household
· direct · ~0.5
This person
Anchor record
Mary Hardy
Daughter · 1920 · age 52 · b. ~1868 · Ohio
★ You are viewing this record
Sibling
Nellie Hardy
Sibling · 1920 · age 54
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
1920 US Federal Census — Montgomery, Ohio
Open full size
1920 US Federal Census — Montgomery, Ohio
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1421unit:1046)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Carmen E. Amann | 19 | Daughter | Bookbinder | Ohio |
| 2 | Everett G. Amann | 15 | Son | — | Ohio |
| 3 | Ethel M. Amann | 11 | Daughter | — | Ohio |
| 4 | Jane Ann Hardy | 76 | Head | — | Ohio |
| 5 | Nellie E. Hardy | 54 | Daughter | — | Ohio |
| 6 | Mary A. Hardy THIS PERSON | 52 | Daughter | Assistant Secretary | Ohio |
| 7 | Charles R. Parker | 31 | Lodger | Toolmaker | New York |
| 8 | Lester B. Monroe | 23 | Lodger | Auto Repairman | Ohio |
| 9 | James J. Flynn | 53 | Head | — | Ohio |
| 10 | Mary E. Flynn | 43 | Wife | — | Ohio |
| 11 | Albert Strominger | 22 | Lodger | Auto Repairman | Indiana |
| 12 | L. Harrison | 26 | Lodger | Auto Repairman | Indiana |
| 13 | Earl O. Koch | 38 | Lodger | Traveling Salesman | Ohio |
| 14 | Walter H. Cummings | 25 | Lodger | Tool & Die Maker | New Hampshire |
| 15 | Jerome T. Flora | 34 | Lodger | Bookbinder | North Carolina |
| 16 | Ralph L. Maple | 25 | Lodger | Assembler | Ohio |
| 17 | William H. Robinson | 31 | Head | — | Ohio |
| 18 | Edith R. Robinson | 30 | Wife | — | Ohio |
| 19 | William H. Robinson | 8 | Son | — | Ohio |
| 20 | Vietta S. Leonard | 70 | Head | — | New York |
| 21 | Edna Stoddard | 40 | Daughter | Saleslady | Illinois |
| 22 | Margaret Stoddard | 13 | Granddaughter | — | Ohio |
| 23 | Oris H. Hopping | 38 | Head | Repairman | Indiana |
| 24 | Dora L. Hopping | 36 | Wife | — | Ohio |
| 25 | Irvin G. Hopping | 14 | Son | — | Indiana |
| 26 | Rachael Munsbrook | 58 | Mother-in-law | Nursing | Ohio |
| 27 | Daisy Frankhouser | 23 | Lodger | Drill Press Hand | West Virginia |
| 28 | George V. Thorbald | 56 | Head | Laborer | Ohio |
| 29 | Charlotte F. Thorbald | 54 | Wife | — | Prussia |
| 30 | Arthur H. Thorbald | 30 | Son | Toolmaker | Ohio |
| 31 | Hermina Thorbald | 26 | Daughter-in-law | — | Ohio |
| 32 | Homer W. Martin | 30 | Head | Superintendent | Ohio |
| 33 | Iola M. Martin | 29 | Wife | — | Ohio |
| 34 | Doris R. Martin | 5 | Daughter | — | Ohio |
| 35 | Homer B. Martin | 4 | Son | — | Ohio |
| 36 | David Casson | 35 | Head | Electrician | Ohio |
| 37 | Mary E. Casson | 29 | Wife | — | Ohio |
| 38 | Delmar D. Casson | 2 | Son | — | Ohio |
| 39 | Eileen G. Casson | 1 | Daughter | — | Ohio |
| 40 | Andrew Niekenhoffer | 21 | Lodger | Fireman | Ohio |
| 41 | Guy J. Body | 24 | Lodger | Laborer | Michigan |
| 42 | Martha Kunsake | 74 | Head | — | Ohio |
| 43 | Louis Way | 47 | Head | Druggist | Ohio |
| 44 | Jennie Way | 45 | Wife | — | Ohio |
| 45 | Peter A. Engler | 45 | Head | Merchant | Ohio |
| 46 | Lillian M. Engler | 43 | Wife | — | Ohio |
| 47 | Dorothy B. Engler | 16 | Daughter | — | Ohio |
| 48 | Joseph P. Engler | 14 | Son | — | Ohio |
| 49 | Martha M. Engler | 9 | Daughter | — | Ohio |
| 50 | Laura V. Rush | 45 | Sister-in-law | Proprietor | Ohio |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 2 parents
~0.71
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)