MH
Mary Hennessy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Blue Earth, Minnesota
Our Model Tree links this Mary Hennessy across the 1920 and 1930 US Censuses in Blue Earth, Minnesota (XGBoost, ~Confirmed) — first a daughter (b.~1919), then head of a 9-person household.
Age 11
b. ~1919
Female
Daughter
Born: Minnesota
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Blue Earth, Minnesota |
| Surname | Hennessy |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | Mankato City |
| Est. Birth Year | ~1919 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Clara Hennessy | Spouse | — | 40 | ~1890 |
| Kathleen Hennessy | Daughter | — | 16 | ~1914 |
| Florence Hennessy | Daughter | — | 20 | ~1910 |
| Donald Hennessy | Son | — | 18 | ~1912 |
| Dorothy Hennessy | Daughter | — | 10 | ~1920 |
| Alice Hennessy | Daughter | — | 10 | ~1920 |
| John Hennessy | Head | — | 47 | ~1883 |
| Mary Hennessy | Daughter | — | 11 | ~1919 |
| Bernadine Hennessy | Daughter | — | 13 | ~1917 |
Census Appearances
1920
Blue Earth, …
Daughter, age 1
Blue Earth, Minnesota · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Blue Earth, …
Daughter, age 11
Blue Earth, Minnesota · implied b. ~1919 — 9 household members
| Surname | Hennessy |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Can Read/Write | Yes |
| 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 Hennessy across 2 US Census years (1920 and 1930) in Blue Earth, Minnesota, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hennessy
Daughter · 1930 · age 11 · b. ~1919 · Minnesota
★ You are viewing this record
Sibling
Dorothy Hennessy
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Hennessy
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Hennessy
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Hennessy
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Hennessy
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernadine Hennessy
Sibling · 1930 · age 13
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 — Blue Earth, Minnesota
Open full size
1930 US Federal Census — Blue Earth, Minnesota
Page Contents
50 people indexed on this census page (ia:1930:minnesotacensus00reel1080:0707)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Renee Hendricks | 2 | daughter | — | South Dakota |
| 2 | Irene F Loomis | 75 | Head | — | New York |
| 3 | Nettie Merrill | 47 | Head | — | Minnesota |
| 4 | Amer Merrill | 27 | Son | — | Minnesota |
| 5 | Maurice Merrill | 24 | Son | Laborer | Minnesota |
| 6 | Clifford Merrill | 21 | Son | Laborer | Minnesota |
| 7 | Bertram Merrill | 19 | Son | — | Minnesota |
| 8 | Edna Merrill | 18 | daughter | Playing Gardens | Minnesota |
| 9 | Bess Merrill | 17 | Son | — | Minnesota |
| 10 | Inez Merrill | 16 | daughter | — | Minnesota |
| 11 | Doris Merrill | 15 | daughter | — | Minnesota |
| 12 | Lillian Merrill | 14 | daughter | — | Minnesota |
| 13 | Evelyn Merrill | 12 | daughter | — | Minnesota |
| 14 | Donald Merrill | 10 | Son | — | Minnesota |
| 15 | Bernal Merrill | 8 | Son | — | Minnesota |
| 16 | Lela Merrill | 7 | daughter | — | Minnesota |
| 17 | Earl Scherer | 39 | Head | — | Minnesota |
| 18 | Renee Scherer | 35 | wife | Dance Manager | France |
| 19 | Phyllis Byen | 7 | boarder | — | Minnesota |
| 20 | Benjamin S Loomis | 49 | Railroad Shop | Bookkeeper | Wisconsin |
| 21 | Edith Loomis | 49 | wife | — | Minnesota |
| 22 | John R Hennessy | 47 | Head | Electrician | Minnesota |
| 23 | Clara Hennessy | 40 | wife | — | Minnesota |
| 24 | Florence Hennessy | 20 | daughter | — | Minnesota |
| 25 | Donald Hennessy | 18 | Son | — | Minnesota |
| 26 | Kathleen Hennessy | 16 | daughter | — | Minnesota |
| 27 | Bernadine Hennessy | 13 | daughter | — | Minnesota |
| 28 | Mary Hennessy THIS PERSON | 11 | daughter | — | Minnesota |
| 29 | Alice Hennessy | 10 | daughter | — | Minnesota |
| 30 | Dorothy Hennessy | 10 | daughter | — | Minnesota |
| 31 | John J Peterson | 32 | Head | Miller | Minnesota |
| 32 | Mary Peterson | 27 | wife | — | Wisconsin |
| 33 | Conrad Peterson | 1 | daughter | — | Minnesota |
| 34 | William F Gossard | 38 | Head | Carpenter | Iowa |
| 35 | Susan Gossard | 34 | wife | — | Minnesota |
| 36 | Jean Gossard | 15 | daughter | — | Minnesota |
| 37 | Phyllis Gossard | 13 | daughter | — | Minnesota |
| 38 | Alice Gossard | 11 | daughter | — | Minnesota |
| 39 | Evelyn Gossard | 10 | daughter | — | Minnesota |
| 40 | Robert J Gossard | 9 | Son | — | Minnesota |
| 41 | Stanley Gossard | 8 | Son | — | Minnesota |
| 42 | James Morrow | 77 | Father | — | Indiana |
| 43 | Anna Gossard | 75 | Head | — | England |
| 44 | Alice Gossard | 34 | daughter | Stenographer | Iowa |
| 45 | Ellin Corey | 66 | Head | — | Syria |
| 46 | Sarah Corey | 58 | wife | — | Syria |
| 47 | Leroy Parker | 35 | Head | Common Laborer | Iowa |
| 48 | Alice Parker | 38 | wife | — | Iowa |
| 49 | George Parker | 11 | Son | — | South Dakota |
| 50 | Dorothy Parker | 9 | daughter | — | Minnesota |
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)