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Mary Hennessey — 1930 US Census Record
Model Tree available1930 United States Federal Census · Ramsey, Minnesota
Our Model Tree links this Mary Hennessey across the 1920, 1930 and 1940 US Censuses in Ramsey, Minnesota (XGBoost, ~Confirmed), with identified parents Fred & Fred — first a daughter (b.~1918), then head of a 4-person household.
Age 12
b. ~1918
Female
Daughter
Born: Minnesota
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Ramsey, Minnesota |
| Surname | Hennessey |
| Given Name | Mary Josephine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | St Paul City |
| Est. Birth Year | ~1918 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Patricia Hennessey | Daughter | — | 10 | ~1920 |
| Phoebe Hennessey | Other | — | 39 | ~1891 |
| Mary Hennessey | Daughter | — | 12 | ~1918 |
| Fred Hennessey | Head | — | 43 | ~1887 |
Census Appearances
1920
Ramsey, Minnesota
Daughter, age 2
Ramsey, Minnesota · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessy |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Ramsey, Minnesota
Daughter, age 12
Ramsey, Minnesota · implied b. ~1918 — 4 household members
| Surname | Hennessey |
| Given Name | Mary Josephine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
Daughter, age 22
Ramsey-County, Minnesota · implied b. ~1918 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessy |
| Given Name | Mary Jo |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | St Paul City |
| 1935 Residence (County) | Ramsey |
| Occupation | Sales Clerk |
| Industry | Retail Department Store |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 850 |
| Highest Grade | C 2 |
| 1935 Residence | Minnesota |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Hennessey across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Fred Hennessey (~0.92 confidence) and father Fred Hennessy (~0.92 confidence) and mother Phoebe Hennessy (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Fred Hennessey
b. ~1887
Source father
● Household
· direct · ~0.92
Father
Fred Hennessy
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Phoebe Hennessy
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Hennessey
Daughter · 1930 · age 12 · b. ~1918 · Minnesota
★ You are viewing this record
Sibling
Patricia Hennessey
Sibling · 1930 · age 10
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
1930 US Federal Census — Ramsey, Minnesota
Open full size
1930 US Federal Census — Ramsey, Minnesota
Page Contents
50 people indexed on this census page (ia:1930:minnesotacensus00reel1117:0661)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Henry C. Ott | 52 | Head | Contractor | Minnesota |
| 2 | Caroline Ott | 53 | Wife-H | None | Minnesota |
| 3 | Minnie Graupman | 47 | Sister-in-law | Seamstress | Minnesota |
| 4 | Charles W. Miller | 38 | Head | Mechanic | Minnesota |
| 5 | Athena Miller | 37 | Wife-H | None | Minnesota |
| 6 | Athena Miller | 10 | Daughter | None | Minnesota |
| 7 | Billy Ann Miller | 8 | Daughter | None | Minnesota |
| 8 | Ruth Miller | 5 | Daughter | None | Minnesota |
| 9 | William B. Bealands | 61 | Head | Meter Inspector | Wisconsin |
| 10 | Johanna Bealands | 55 | Wife-H | None | Germany |
| 11 | Mildred Bealands | 26 | Daughter | Typist | Minnesota |
| 12 | Richard W. Pearl | 28 | Head | Salesman | Kansas |
| 13 | Ella Pearl | 62 | Mother-H | None | Kentucky |
| 14 | Francis S. Marquardt | 71 | Head | None | Germany |
| 15 | Cindy Marie Marquardt | 36 | Daughter | None | Minnesota |
| 16 | Albert B. Marquardt | 46 | Son-in-law | Sign Writer | Iowa |
| 17 | Marie W. Marquardt | 9 | Grand Daughter | None | Minnesota |
| 18 | Elmer Elvgren | 40 | Head | President | Wisconsin |
| 19 | Elva Elvgren | 38 | Wife-H | None | Minnesota |
| 20 | Donna Elvgren | 11 | Daughter | None | Minnesota |
| 21 | Graham Elvgren | 6 | Son | None | Minnesota |
| 22 | Frank Oelker | 52 | Head | Clerk | Minnesota |
| 23 | Elsie Oelker | 44 | Wife-H | None | Germany |
| 24 | Margaret Oelker | 17 | Daughter | None | Minnesota |
| 25 | Charles Nergun | 43 | Head | Driver | Minnesota |
| 26 | Anna Nergun | 41 | Wife-H | None | Minnesota |
| 27 | John M. Townley | 47 | Head | Engineer | Pennsylvania |
| 28 | Augusta Townley | 45 | Wife-H | None | Wisconsin |
| 29 | Lenard Townley | 17 | Son | None | Minnesota |
| 30 | John Townley | 10 | Son | None | Minnesota |
| 31 | Philip Townley | 8 | Son | None | Minnesota |
| 32 | Henry P. Martin | 38 | Head | Examiner | Minnesota |
| 33 | Ina Martin | 38 | Wife-H | None | Indiana |
| 34 | Jean Martin | 8 | Daughter | None | Minnesota |
| 35 | John Mcgraw | 57 | Head | District Chief | Minnesota |
| 36 | Bridget Mcgraw | 56 | Wife-H | None | Irish Free State |
| 37 | Clay M. Martindell | 35 | Head | Abstract Clerk | Minnesota |
| 38 | Ethel Martindell | 33 | Wife-H | None | Minnesota |
| 39 | Loraine Martindell | 10 | Daughter | None | Minnesota |
| 40 | Raymond Martindell | 1 | Son | None | Minnesota |
| 41 | Fred H. Hennessey | 43 | Head | Bookkeeper | Minnesota |
| 42 | Phoebe Josephine Hennessey | 39 | Wife-H | None | Minnesota |
| 43 | Mary Josephine Hennessey THIS PERSON | 12 | Daughter | None | Minnesota |
| 44 | Patricia Hennessey | 10 | Daughter | None | Minnesota |
| 45 | Willard Fuller | 47 | Head | Engraver | Minnesota |
| 46 | Melrose Fuller | 44 | Wife-H | None | Minnesota |
| 47 | Loraine Fuller | 19 | Daughter | Stenographer | Minnesota |
| 48 | Dorothy Jane Fuller | 15 | Daughter | None | Minnesota |
| 49 | Henry Martin | 64 | Head | Manager | Wisconsin |
| 50 | Jessie M. Martin | 42 | Wife-H | None | Minnesota |
Related Census Records
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 1930 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)