MD
Mary Davidson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Leavenworth-County, Kansas
Our Model Tree links this Mary Davidson across the 1920, 1930 and 1940 US Censuses in Leavenworth-County, Kansas (XGBoost, ~Confirmed), with identified parents Clyde & Rose — first a daughter (b.~1920), then head of a 3-person household.
Age 20
b. ~1920
Female
Daughter
Born: Kansas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Leavenworth-County, Kansas |
| Surname | Davidson |
| Given Name | Mary Rose |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Tonganoxie |
| 1935 Residence (County) | Leavenworth |
| Additional Details | |
| Highest Grade | H-4 |
| 1935 Residence | Kansas |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Township / Ward | Tonganoxie Township |
| Est. Birth Year | ~1920 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Davidson | Daughter | — | 20 | ~1920 |
| Clyde Davidson | Head | — | 51 | ~1889 |
| Rose Davidson | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Leavenworth, Kansas
Daughter, age
Leavenworth, Kansas · implied b. ~1920 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Kansas |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1930
Leavenworth, Kansas
Daughter, age 10
Leavenworth, Kansas · implied b. ~1920 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Mary Rose |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Kansas |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Leavenworth-County, Kansas
Daughter, age 20
Leavenworth-County, Kansas · implied b. ~1920 — 3 household members
| Surname | Davidson |
| Given Name | Mary Rose |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Tonganoxie |
| 1935 Residence (County) | Leavenworth |
| Highest Grade | H-4 |
| 1935 Residence | Kansas |
| 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 Davidson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Clyde Davidson (~0.92 confidence) and mother Rose Davidson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Clyde Davidson
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Rose Davidson
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Davidson
Daughter · 1940 · age 20 · b. ~1920 · Kansas
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Leavenworth-County, Kansas
Open full size
1940 US Federal Census — Leavenworth-County, Kansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01240-01174)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Columbus S. Mcafee | 57 | Head | Farmer | North Carolina |
| 42 | Ratchel Mcafee | 63 | Wife | — | North Carolina |
| 43 | Sam Harrod | 60 | Lodger | Farmer | North Carolina |
| 44 | Ralph Stephens | 40 | Lodger | Farmer | Missouri |
| 45 | Pearl Blackwell | 61 | Head | Farmer | Kansas |
| 46 | Pearl Blackwell | 61 | Wife | — | Kansas |
| 47 | Alice Drake | 54 | Head | Farmer | Missouri |
| 48 | James Fowler | 13 | Grandson | — | Kansas |
| 49 | Laurence Hummelgaard | 44 | Head | Farmer | Kansas |
| 50 | Mary Hummelgaard | 35 | Wife | — | Kansas |
| 51 | Bonny Mae Hummelgaard | 13 | Daughter | — | Kansas |
| 52 | John Hummelgaard | 11 | Son | — | Kansas |
| 53 | Margaret M. Hummelgaard | 9 | Daughter | — | Kansas |
| 54 | Larry D. Hummelgaard | 7 | Son | — | Kansas |
| 55 | Richard Hummelgaard | 5 | Son | — | Kansas |
| 56 | Shirley Hummelgaard | 3 | Daughter | — | Kansas |
| 57 | Susan Bridu | 76 | Mother-in-law | — | Pennsylvania |
| 58 | Clyde Davidson | 51 | Head | Farmer | Kansas |
| 59 | Rose Davidson | 49 | Wife | — | Kansas |
| 60 | Mary Rose Davidson THIS PERSON | 20 | Daughter | — | Kansas |
| 61 | Charlie G. Peterson | 61 | Head | Farmer | Sweden |
| 62 | Lucia Peterson | 50 | Wife | — | Sweden |
| 63 | Ray Peterson | 26 | Son | Farmer | Missouri |
| 64 | Louise Peterson | 19 | Daughter | — | Kansas |
| 65 | Carl Peterson | 17 | Son | — | Kansas |
| 66 | Alfred L. Parsons | 46 | Head | Manager | Kansas |
| 67 | Esther Parsons | 41 | Wife | — | Kansas |
| 68 | Percy Parsons | 14 | Son | Farm Helper | Kansas |
| 69 | Deloris Parsons | 13 | Daughter | — | Kansas |
| 70 | Lena Johnson | 51 | Sister-in-law | — | Indiana |
| 71 | Henry A. Kepler | 67 | Head | Contractor | Kansas |
| 72 | Bessie Kepler | 65 | Wife | — | Kansas |
| 73 | Elmer Lewellen | 35 | Head | Farmer | Missouri |
| 74 | Bessie Lewellen | 30 | Wife | — | Missouri |
| 75 | Geraldine Lewellen | 3 | Daughter | — | Montana |
| 76 | Billy Jean Graham | 12 | Daughter | — | Missouri |
| 77 | Miler R. Conrad | 72 | Head | — | Indiana |
| 78 | Mary E. Conrad | 62 | Wife | — | Kansas |
| 79 | John Conrad | 40 | Head | Farmer | Kansas |
| 80 | Laura Conrad | 38 | Wife | — | Kansas |
Pedigree Summary
Mary
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)