MT
Mary Thornton — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Black Hawk, Iowa
Our Model Tree links this Mary Thornton across the 1930 and 1940 US Censuses in Black Hawk, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 10-person household.
Age 7
b. ~1923
Female
Daughter
Born: Iowa
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Black Hawk, Iowa |
| Surname | Thornton |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Minnesota |
| Additional Details | |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Waterloo City |
| Est. Birth Year | ~1923 |
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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Patricia Thornton | Daughter | — | 5 | ~1925 |
| Margaret Thornton | Daughter | — | ~1930 | |
| Mary Thornton | Daughter | — | 7 | ~1923 |
| John Thornton | Head | — | 35 | ~1895 |
| Freda O'Donnell | Other | — | 54 | ~1876 |
| Gregory Thornton | Son | — | 4 | ~1926 |
| Matthew Thornton | Son | — | ~1930 | |
| Thomas Thornton | Son | — | 2 | ~1928 |
| John Thornton | Son | — | 8 | ~1922 |
| Blanche Thornton | Spouse | — | 34 | ~1896 |
Census Appearances
1930
Black Hawk, …
Daughter, age 7
Black Hawk, Iowa · implied b. ~1923 — 10 household members
| Surname | Thornton |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Minnesota |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Black-Hawk-County, Iowa
Daughter, age 16
Black-Hawk-County, Iowa · implied b. ~1924 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thornton |
| Given Name | Maurita |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Waterloo City |
| 1935 Residence (County) | Black Hawk |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Thornton across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Thornton
Daughter · 1930 · age 7 · b. ~1923 · Iowa
★ You are viewing this record
Sibling
Patricia Thornton
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gregory Thornton
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Matthew Thornton
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Thornton
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Thornton
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Thornton
Sibling · 1930 · age
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 — Black Hawk, Iowa
Open full size
1930 US Federal Census — Black Hawk, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel643:0065)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ch. F. Rohde | 54 | Head | Salesman | Iowa |
| 2 | Milly Rohde | 56 | Wife | — | Pennsylvania |
| 3 | Rachael Rohde | 17 | Daughter | — | Iowa |
| 4 | Raymond O. Hutchison | 45 | Head | Agent | Iowa |
| 5 | Marie Hutchison | 42 | Wife | — | Ohio |
| 6 | Pickels R. Hutchison | 19 | Son | — | Iowa |
| 7 | Corinne Hutchison | 15 | Daughter | — | Iowa |
| 8 | Larry C. Hutchison | 12 | Son | — | Iowa |
| 9 | Carlton Lias | 54 | Head | Attorney | New York |
| 10 | Jeanette P. Lias | 56 | Wife | — | New York |
| 11 | Carlton P. Lias | 24 | Son | Engineer | New York |
| 12 | Irwin P. Lias | 15 | Son | — | New York |
| 13 | Waldo Hotchkiss | 75 | Head | — | New York |
| 14 | Addie M. Hotchkiss | 67 | Wife | — | New York |
| 15 | James C. Bell | 54 | Head | Cutter | Pennsylvania |
| 16 | Ella M. Bell | 54 | Wife | — | Connecticut |
| 17 | Dorothy Bell | 17 | Daughter | — | New York |
| 18 | Ray E. Davis | 46 | Head | President | Iowa |
| 19 | Zola S. Davis | 42 | Wife | — | Iowa |
| 20 | Jane Davis | 12 | Daughter | — | Iowa |
| 21 | Carol Davis | 9 | Daughter | — | Iowa |
| 22 | Isadore Martin | 46 | Head | Proprietor | Russia |
| 23 | Rebecca Martin | 47 | Wife | — | Russia |
| 24 | Jean Martin | 20 | Daughter | Saleswoman | Iowa |
| 25 | George M. Martin | 19 | Son | — | Iowa |
| 26 | Mark H. Martin | 18 | Son | — | Iowa |
| 27 | Miriam Martin | 14 | Daughter | — | Iowa |
| 28 | Wm. W. Heller | 54 | Head | Agent | Iowa |
| 29 | Lucille B. Heller | 34 | Wife | — | Iowa |
| 30 | Margaret Heller | 18 | Daughter | — | Iowa |
| 31 | Delores Heller | 14 | Daughter | — | Iowa |
| 32 | John W. Thornton | 35 | Head | Doctor | Iowa |
| 33 | Blanche Thornton | 34 | Wife | — | Minnesota |
| 34 | John V. Thornton | 8 | Son | — | Iowa |
| 35 | Mary E. Thornton THIS PERSON | 7 | Daughter | — | Iowa |
| 36 | Patricia Thornton | 5 | Daughter | — | Iowa |
| 37 | Gregory J. Thornton | 4 | Son | — | Iowa |
| 38 | Thomas Thornton | 2 | Son | — | Iowa |
| 39 | Matthew Thornton | 0 | Son | — | Iowa |
| 40 | Margaret M. Thornton | 0 | Daughter | — | Iowa |
| 41 | Freda O'Donnell | 54 | Mother-in-law | — | Illinois |
| 42 | Guy C. Knight | 31 | Head | Manager | Nebraska |
| 43 | Loretta A. Knight | 32 | Wife | — | Nebraska |
| 44 | John M. Knight | 4 | Son | — | Iowa |
| 45 | Robert L. Knight | 2 | Son | — | Iowa |
| 46 | Mildred Knight | 20 | Sister | Servant | Iowa |
| 47 | Ralph B. Macdonald | 45 | Head | Proprietor | Iowa |
| 48 | Ralph Macdonald | 47 | Wife | — | Iowa |
| 49 | Rosalie Macdonald | 20 | Daughter | — | Iowa |
| 50 | Charles H. Allyson | 52 | Head | Doctor | Iowa |
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)