ML
Mary Larson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Brown-County, Kansas
Our Model Tree links this Mary Larson across the 1930 and 1940 US Censuses in Brown-County, Kansas (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 9-person household.
Age 15
b. ~1925
Female
Daughter
Born: Kansas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Brown-County, Kansas |
| Surname | Larson |
| Given Name | Mary B. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Horton City |
| 1935 Residence (County) | Brown |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | G 8 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Township / Ward | Horton City |
| Est. Birth Year | ~1925 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Elva Larson | Daughter | — | 19 | ~1921 |
| Mary Larson | Daughter | — | 15 | ~1925 |
| Dorothy Larson | Daughter | — | 17 | ~1923 |
| Palmer Larson | Head | — | 40 | ~1900 |
| James Larson | Son | — | 4 | ~1936 |
| Richard Larson | Son | — | 12 | ~1928 |
| Paul Larson | Son | — | 9 | ~1931 |
| Bernard Larson | Son | — | 7 | ~1933 |
| Irene Larson | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Brown, Kansas
Daughter, age 5
Brown, Kansas · implied b. ~1925 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Mary Lee |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Kansas |
| Can Read/Write | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Brown-County, Kansas
Daughter, age 15
Brown-County, Kansas · implied b. ~1925 — 9 household members
| Surname | Larson |
| Given Name | Mary B. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Horton City |
| 1935 Residence (County) | Brown |
| Income (1939) | 0 |
| Highest Grade | G 8 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 Larson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Larson
Daughter · 1940 · age 15 · b. ~1925 · Kansas
★ You are viewing this record
Sibling
James Larson
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Larson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elva Larson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Larson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Larson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Larson
Sibling · 1940 · age 7
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
1940 US Federal Census — Brown-County, Kansas
Open full size
1940 US Federal Census — Brown-County, Kansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01221-00821)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Palmer E. Larson | 40 | Head | Wpa Carpenter | Kansas |
| 42 | Irene G. D. Larson | 40 | Wife | — | Kansas |
| 43 | Elva M. Larson | 19 | Daughter | — | Kansas |
| 44 | Dorothy D. Larson | 17 | Daughter | Nsa Typist | Kansas |
| 45 | Mary B. Larson THIS PERSON | 15 | Daughter | — | Kansas |
| 46 | Richard O. Larson | 12 | Son | — | Kansas |
| 47 | Paul E. Larson | 9 | Son | — | Kansas |
| 48 | Bernard L. Larson | 7 | Son | — | Kansas |
| 49 | James E. Larson | 4 | Son | — | Kansas |
| 50 | Sherman C. Mcamis | 36 | Head | City Carrier | Kansas |
| 51 | Geneva F. D. Mcamis | 31 | Wife | — | Kansas |
| 52 | Ida M. Campbell | 62 | Head | — | Kentucky |
| 53 | Robert C. D. Campbell | 36 | Son | Grocery And Meat Market Manager | Kansas |
| 54 | Edward L. Tobin | 41 | Head | Poultry Store Manager | Ohio |
| 55 | Vera X. D. Tobin | 42 | Wife | — | Ohio |
| 56 | Marcia L. Tobin | 17 | Daughter | — | Wisconsin |
| 57 | George Ab. Pickering | 58 | Head | Railroad Machinist | England |
| 58 | Sarah T. D. Pickering | 64 | Wife | — | Kansas |
| 59 | Edna B. Simpson | 42 | Daughter | — | Kansas |
| 60 | Clarence A. D. Simpson | 41 | Son-in-law | Railroad Blacksmith | Missouri |
| 61 | James R. Simpson | 7 | Grandson | — | Kansas |
| 62 | Andrew Jr. Young | 27 | Roomer | Manager Retail Department Store | Missouri |
| 63 | Ernest J. Good | 22 | Roomer | High School Teacher | Kansas |
| 64 | Kenneth H. Reed | 34 | Head | Druggist | Colorado |
| 65 | Vera Reed | 33 | Wife | Drug Clerk | Canada-English |
| 66 | Helen Y. Reed | 11 | Daughter | — | Kansas |
| 67 | Janet M. Reed | 9 | Daughter | — | Kansas |
| 68 | Mildred G. D. Larson | 20 | Servant | Housekeeper | Kansas |
| 69 | Homer G. Kipps | 47 | Head | Automobile Salesman | Kansas |
| 70 | Paul X. Kipps | 13 | Son | — | Kansas |
| 71 | Mildred D. Winterscheidt | 25 | Step-daughter | — | Kansas |
| 72 | Grace A. Winterscheidt | 23 | Step-daughter | Beauty Operator | Kansas |
| 73 | William James Van Lew | 34 | Head | Heavy Hardware | Kansas |
| 74 | Fern D. Van Lew | 31 | Wife | — | Kansas |
| 75 | William R. Van Lew | 13 | Son | — | Kansas |
| 76 | James W. Van Lew | 5 | Son | — | Kansas |
| 77 | Donald A. Johannes | 33 | Head | Bank Cashier | Kansas |
| 78 | Janet Johannes | 30 | Wife | — | Kansas |
| 79 | James D. Johannes | 5 | Son | — | Kansas |
| 80 | Phillip Johannes | 3 | Son | — | Kansas |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)