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Mary Monahan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Leavenworth-County, Kansas
Our Model Tree links this Mary Monahan across the 1930 and 1940 US Censuses in Leavenworth-County, Kansas (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 13-person household.
Age 14
b. ~1926
Female
Daughter
Born: Kansas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Leavenworth-County, Kansas |
| Surname | Monahan |
| Given Name | Mary K. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Leavenworth city |
| 1935 Residence (County) | Leavenworth |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Township / Ward | Leavenworth City |
| Est. Birth Year | ~1926 |
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.
13 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Katherine Monahan | Spouse | — | 34 | ~1906 |
| James Monahan | Son | — | 4 | ~1936 |
| Thomas Monahan | Son | — | 6 | ~1934 |
| Edward Monahan | Head | — | 44 | ~1896 |
| Carol Monahan | Daughter | — | ~1940 | |
| Helen Monahan | Daughter | — | 10 | ~1930 |
| Mary Monahan | Daughter | — | 14 | ~1926 |
| John Monahan | Son | — | 4 | ~1936 |
| Charles Monahan | Son | — | 2 | ~1938 |
| Virginia Monahan | Daughter | — | 9 | ~1931 |
| Julia Monahan | Daughter | — | 13 | ~1927 |
| Dorothy Monahan | Daughter | — | 11 | ~1929 |
| Edward Monahan | Son | — | 15 | ~1925 |
Census Appearances
1930
Leavenworth, Kansas
Daughter, age 4
Leavenworth, Kansas · implied b. ~1926 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monahan |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Russia |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Leavenworth-County, Kansas
Daughter, age 14
Leavenworth-County, Kansas · implied b. ~1926 — 13 household members
| Surname | Monahan |
| Given Name | Mary K. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Leavenworth city |
| 1935 Residence (County) | Leavenworth |
| Highest Grade | No 6 |
| 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 Monahan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Monahan
Daughter · 1940 · age 14 · b. ~1926 · Kansas
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Sibling
Julia Monahan
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Monahan
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Monahan
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Monahan
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Monahan
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carol Monahan
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Monahan
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Monahan
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Monahan
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Monahan
Sibling · 1940 · age 9
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 — 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-t0627-01240-01007)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jess Speir | 62 | Head | — | Missouri |
| 42 | Nancy J. Speir | 62 | Wife | — | Arkansas |
| 43 | George H. Speir | 22 | Son | Moulder | Missouri |
| 44 | John Panek | 54 | Head | Nightwatchman | Minnesota |
| 45 | Stalefia Panek | 51 | Wife | Laundress | Poland |
| 46 | Martha Panek | 18 | Daughter | Laundress | Kansas |
| 47 | Joseph Panek | 17 | Son | — | Kansas |
| 48 | Catherine Panek | 12 | Daughter | — | Kansas |
| 49 | Edward Monahan | 44 | Head | Mason Helper | Kansas |
| 50 | Katherine Monahan | 34 | Wife | — | Russia |
| 51 | Edward Jr. Monahan | 15 | Son | New Worker | Kansas |
| 52 | Mary K. Monahan THIS PERSON | 14 | Daughter | — | Kansas |
| 53 | Julia M. Monahan | 13 | Daughter | — | Kansas |
| 54 | Dorothy J. Monahan | 11 | Daughter | — | Kansas |
| 55 | Helen B. Monahan | 10 | Daughter | — | Kansas |
| 56 | Virginia L. Monahan | 9 | Daughter | — | Kansas |
| 57 | Thomas P. Monahan | 6 | Son | — | Kansas |
| 58 | James Monahan | 4 | Son | — | Kansas |
| 59 | John Monahan | 4 | Son | — | Kansas |
| 60 | Charles Monahan | 2 | Son | — | Kansas |
| 61 | Carol J. Monahan | 0 | Daughter | — | Kansas |
| 62 | George Rickerson | 53 | Head | Truck Driver | Missouri |
| 63 | Blanche Rickerson | 42 | Wife | — | Kansas |
| 64 | June Rickerson | 7 | Daughter | — | Kansas |
| 65 | Jim G. Rickerson | 5 | Son | — | Kansas |
| 66 | Mary Rickerson | 4 | Daughter | — | Kansas |
| 67 | James Bradbury | 54 | Head | — | Missouri |
| 68 | Rosa Bradbury | 38 | Wife | — | Missouri |
| 69 | Edward Powers | 44 | Head | Service Man | Kansas |
| 70 | Marie Powers | 41 | Wife | — | Missouri |
| 71 | Edward Jr. Powers | 21 | Son | New Worker | Kansas |
| 72 | Frances Klinger | 46 | Head | — | Kansas |
| 73 | John Klinger | 19 | Son | Truck Driver | Kansas |
| 74 | Lee Warren Klinger | 17 | Son | Labor | Kansas |
| 75 | Theodore C. Klinger | 16 | Son | — | Kansas |
| 76 | William Klinger | 14 | Son | — | Kansas |
| 77 | Joseph Klinger | 12 | Son | — | Kansas |
| 78 | Marie Klinger | 11 | Daughter | — | Kansas |
| 79 | Emogene Sherman | 23 | Daughter | — | Kansas |
| 80 | Jean M. Sherman | 2 | Daughter | — | 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)