MP
Mary Peterson — 1930 US Census Record
Model Tree available1930 United States Federal Census · Brown, South Dakota
Our Model Tree links this Mary Peterson across the 1910, 1920 and 1930 US Censuses in Brown, South Dakota (XGBoost, ~Confirmed), with identified parents Nels & Nels — first a daughter (b.~1901), then head of a 8-person household.
Age 29
b. ~1901
Female
Daughter
Born: Iowa
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Brown, South Dakota |
| Surname | Peterson |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Iowa |
| Age at First Marriage | W |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Additional Details | |
| Occupation | Post Mistress |
| Industry | United States Mail |
| Class of Worker | 9976 |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Post Mistress |
| Township / Ward | Twp 126 Range 64 Oneota |
| Est. Birth Year | ~1901 |
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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Edna Peterson | Daughter | — | 18 | ~1912 |
| Mary Peterson | Daughter | — | 29 | ~1901 |
| Dora Peterson | Daughter | — | 12 | ~1918 |
| Ella Peterson | Daughter | — | 16 | ~1914 |
| Nels Peterson | Head | — | — | |
| Lloyd Pease | Other | — | 14 | ~1916 |
| Carrie Peterson | Other | — | 55 | ~1875 |
| Albert Peterson | Son | — | 26 | ~1904 |
Census Appearances
1910
Brown, South …
Daughter, age 9
Brown, South Dakota · implied b. ~1901 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1920
Brown, South …
Daughter, age 18
Brown, South Dakota · implied b. ~1902 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Clerk |
| Industry | Store Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Brown, South …
Daughter, age 29
Brown, South Dakota · implied b. ~1901 — 8 household members
| Surname | Peterson |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Iowa |
| Age at First Marriage | W |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Post Mistress |
| Industry | United States Mail |
| Class of Worker | 9976 |
| Can Read/Write | Yes |
| 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 Peterson across 3 US Census years (1910, 1920 and 1930) in Brown, South Dakota, using XGBoost record linkage. Identified parents: father Nels Peterson (~0.80 confidence) and father Nels Peterson (~0.92 confidence) and father Nels Peterson (~0.92 confidence) and mother Carrie Peterson (~0.92 confidence) and mother Annie Peterson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.9
Father
Nels Peterson
b. ~None
Source father
● Household
· direct · ~0.8
Father
Nels Peterson
b. ~1874
Source father
● Household
· direct · ~0.92
Father
Nels Peterson
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Carrie Peterson
b. ~1875
Source mother
● Household
· direct · ~0.92
Mother
Annie Peterson
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Peterson
Daughter · 1930 · age 29 · b. ~1901 · South Dakota
★ You are viewing this record
Sibling
Edna Peterson
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ella Peterson
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dora Peterson
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Peterson
Sibling · 1930 · age 26
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 — Brown, South Dakota
Open full size
1930 US Federal Census — Brown, South Dakota
Page Contents
50 people indexed on this census page (ia:1930:15thcensus2219unit:0200)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Arthur E. Pfeifer | 20 | Brother | Farm Laborer | North Dakota |
| 52 | Alma Pfeifer | 23 | Sister | None | North Dakota |
| 53 | Ella E. Pfeifer | 18 | Sister | None | North Dakota |
| 54 | Margrette Pfeifer | 56 | Mother | None | Germany |
| 55 | Martin Kapper | None | Head | — | — |
| 56 | Lydia Kapper | 21 | Wife-H | None | South Dakota |
| 57 | Harold A. Kapper | 1 | Son | None | North Dakota |
| 58 | Maiton Nelson | None | Head | Norwegian | — |
| 59 | Kate B. Nelson | 43 | Wife-H | None | Minnesota |
| 60 | Margrette E. Nelson | 17 | Daughter | None | South Dakota |
| 61 | Thelma S. Nelson | 14 | Daughter | None | South Dakota |
| 62 | Mabel R. Nelson | 12 | Daughter | None | South Dakota |
| 63 | Viola M. Nelson | 8 | Daughter | None | South Dakota |
| 64 | Nels C. Peterson | None | Head | Danish | — |
| 65 | Carrie M. Peterson | 55 | Wife-H | None | Denmark |
| 66 | Mary E. Peterson THIS PERSON | 29 | Daughter | Post Mistress | Iowa |
| 67 | Albert L. Peterson | 26 | Son | Farm Laborer | Iowa |
| 68 | Edna M. Peterson | 18 | Daughter | None | South Dakota |
| 69 | Ella L. Peterson | 16 | Daughter | None | South Dakota |
| 70 | Dora E. Peterson | 12 | Daughter | None | South Dakota |
| 71 | Lloyd Pease | 14 | Roomer | None | Canada-English |
| 72 | Conrad Stummeier | None | Head | German | — |
| 73 | Mary A. Stummeier | 19 | Wife-H | None | Iowa |
| 74 | John Roesch | 24 | Boarder | Farm Manager | South Dakota |
| 75 | Rufus B. Wellworth | None | Head | — | — |
| 76 | Lydia H. Wellworth | 43 | Wife-H | None | Minnesota |
| 77 | Chancellor R. Wellworth | 23 | Son | Farm Laborer | South Dakota |
| 78 | William H. Wellworth | 22 | Son | None | South Dakota |
| 79 | Helen M. Wellworth | 20 | Daughter | Servant | South Dakota |
| 80 | Donald R. Wellworth | 16 | Son | None | South Dakota |
| 81 | Florence M. Wellworth | 13 | Daughter | None | South Dakota |
| 82 | Viola J. Wellworth | 9 | Daughter | None | South Dakota |
| 83 | Harold E. Wellworth | 4 | Son | None | South Dakota |
| 84 | William Voss | None | Head | — | — |
| 85 | Rose C. M. Voss | 37 | Wife-H | None | Iowa |
| 86 | Theodore Hamilton | 25 | Son-in-law | Farmer | South Dakota |
| 87 | Gladys L. Hamilton | 20 | Daughter | None | Iowa |
| 88 | Ramona B. Hamilton | 1 | Grandchild | None | South Dakota |
| 89 | Beverly L. Hamilton | 0 | Grandchild | None | South Dakota |
| 90 | Max King | None | Head | German | — |
| 91 | Schiele B. King | 40 | Wife-H | None | Germany |
| 92 | Walter R. King | 26 | Son | Farmer | South Dakota |
| 93 | Albert O. King | 21 | Son | Farmer | South Dakota |
| 94 | Bruno G. King | 16 | Son | None | South Dakota |
| 95 | James E. Cantwell | None | Head | — | — |
| 96 | Irene M. Cantwell | 35 | Wife-H | None | South Dakota |
| 97 | Joseph F. Cantwell | 9 | Son | None | South Dakota |
| 98 | Leo Cantwell | 5 | Son | None | South Dakota |
| 99 | Patrick T. Cantwell | 4 | Son | None | South Dakota |
| 100 | Jean L. Cantwell | 2 | Daughter | None | South Dakota |
Related Census Records
Pedigree Summary
Mary + 4 siblings
Gen 1 · 5 parents
~0.9
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)