MM
Mary Mcdermott — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Jefferson, Kentucky
Our Model Tree links this Mary Mcdermott across the 1910 and 1920 US Censuses in Jefferson, Kentucky (XGBoost, ~Confirmed) — first a daughter (b.~1909), then head of a 12-person household.
Age 11
b. ~1909
Female
Daughter
Born: Kentucky
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Jefferson, Kentucky |
| Surname | McDermott |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Additional Details | |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1909 |
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.
12 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Henrietta Mcdermott | Daughter | — | 5 | ~1915 |
| Mary Mcdermott | Daughter | — | 11 | ~1909 |
| Martha Mcdermott | Daughter | — | 14 | ~1906 |
| Anna Mcdermott | Daughter | — | 1 | ~1919 |
| Michael Mcdermott | Head | — | 53 | ~1867 |
| Andrew Mcdermott | Son | — | 17 | ~1903 |
| Thomas Mcdermott | Son | — | 7 | ~1913 |
| John Mcdermott | Son | — | 24 | ~1896 |
| Michael Mcdermott | Son | — | 26 | ~1894 |
| William Mcdermott | Son | — | 18 | ~1902 |
| Joseph Mcdermott | Son | — | 9 | ~1911 |
| Mary Mcdermott | Spouse | — | 49 | ~1871 |
Census Appearances
1910
Jefferson, Kentucky
Daughter, age 2
Jefferson, Kentucky · implied b. ~1908 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1920
Jefferson, Kentucky
Daughter, age 11
Jefferson, Kentucky · implied b. ~1909 — 12 household members
| Surname | McDermott |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 Mcdermott across 2 US Census years (1910 and 1920) in Jefferson, Kentucky, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcdermott
Daughter · 1920 · age 11 · b. ~1909 · Kentucky
★ You are viewing this record
Sibling
John Mcdermott
Sibling · 1920 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martha Mcdermott
Sibling · 1920 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Mcdermott
Sibling · 1920 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Mcdermott
Sibling · 1920 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henrietta Mcdermott
Sibling · 1920 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Michael Mcdermott
Sibling · 1920 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Andrew Mcdermott
Sibling · 1920 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Mcdermott
Sibling · 1920 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Mcdermott
Sibling · 1920 · 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
1920 US Federal Census — Jefferson, Kentucky
Open full size
1920 US Federal Census — Jefferson, Kentucky
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu579unit:0539)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Chatman | 56 | Head | Porter | Virginia |
| 2 | Alice Chatman | 50 | Wife | Maid | Kentucky |
| 3 | William Chatman | 19 | Son | Porter | Kentucky |
| 4 | John Beckham | 46 | Head | Carpenter | Alabama |
| 5 | Mattie Beckham | 32 | Wife | None | Alabama |
| 6 | Norwood Edward Beckham | 24 | Nephew | None | Alabama |
| 7 | Julia Booker | 34 | Head | Laundry | Georgia |
| 8 | Ana May Booker | 13 | Daughter | None | Georgia |
| 9 | Manuel Thomas | 41 | Head | Laborer | Kentucky |
| 10 | Mary Thomas | 34 | Wife | None | Kentucky |
| 11 | Marie Thomas | 6 | Daughter | None | Kentucky |
| 12 | Alvin Ballard | 11 | Step-son | None | Kentucky |
| 13 | Leo Ballard | 9 | Step-son | None | Kentucky |
| 14 | Mike Steel | 71 | Head | Switchman | Kentucky |
| 15 | Bridget Steel | 72 | Sister | None | Kentucky |
| 16 | Richard Fallon | 39 | Head | Mechanic | Kentucky |
| 17 | Catherine Fallon | 46 | Wife | None | Kentucky |
| 18 | Mary Munson | 60 | Head | None | Ireland |
| 19 | Arthur Dulaney | 27 | Head | Repairman | Kentucky |
| 20 | Mary Dulaney | 22 | Wife | None | Kentucky |
| 21 | James Dulaney | 0 | Son | None | Kentucky |
| 22 | Helen Reid | 26 | Head | Electrician | Indiana |
| 23 | Mary G. Reid | 24 | Wife | None | Indiana |
| 24 | Dorothy Reid | 3 | Daughter | None | Kentucky |
| 25 | Edna Reid | 1 | Daughter | None | Indiana |
| 26 | Hugh Madden | 42 | Head | Carpenter | Ireland |
| 27 | Julia Madden | 25 | Wife | None | Ireland |
| 28 | Patrick Madden | 50 | Brother | None | Ireland |
| 29 | James Wolf | 16 | Nephew | Lamp Tender | Kentucky |
| 30 | Edward Burke | 30 | Lodger | Switchman | Ireland |
| 31 | Isaac Whitney | 72 | Head | Transferman | Kentucky |
| 32 | Alecia Whitney | 70 | Wife | None | Kentucky |
| 33 | Ray Avery | 26 | Head | Laborer | Kentucky |
| 34 | Lorena Avery | 27 | Wife | None | Kentucky |
| 35 | Charles Avery | 5 | Son | None | Kentucky |
| 36 | Michael Mcdermott | 53 | Head | Iron Moulder | Kentucky |
| 37 | Mary Mcdermott | 49 | Wife | None | Kentucky |
| 38 | Michael Mcdermott | 26 | Son | Fireman | Kentucky |
| 39 | John Mcdermott | 24 | Son | Electrician | Kentucky |
| 40 | William Mcdermott | 18 | Son | Tinner | Kentucky |
| 41 | Andrew Mcdermott | 17 | Son | Electrician | Kentucky |
| 42 | Martha Mcdermott | 14 | Daughter | None | Kentucky |
| 43 | Mary Mcdermott THIS PERSON | 11 | Daughter | None | Kentucky |
| 44 | Joseph Mcdermott | 9 | Son | None | Kentucky |
| 45 | Thomas Mcdermott | 7 | Son | None | Kentucky |
| 46 | Henrietta Mcdermott | 5 | Daughter | None | Kentucky |
| 47 | Anna Alice Mcdermott | 1 | Daughter | None | Kentucky |
| 48 | William Heckel | 52 | Head | Dealer | Kentucky |
| 49 | Mary Heckel | 50 | Wife | None | Kentucky |
| 50 | Emily L. Heckel | 10 | Daughter | None | Kentucky |
Related Census Records
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)