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Mary Mcdermott — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Dubuque, Iowa
Our Model Tree links this Mary Mcdermott across the 1910 and 1920 US Censuses in Dubuque, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1910), then head of a 11-person household.
Age 10
b. ~1910
Female
Daughter
Born: Iowa
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Dubuque, Iowa |
| Surname | McDermott |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Whitewater Township |
| Est. Birth Year | ~1910 |
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.
11 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Loretta Mcdermott | Daughter | — | 7 | ~1913 |
| Bernetta Mcdermott | Daughter | — | 2 | ~1918 |
| Mary Mcdermott | Daughter | — | 10 | ~1910 |
| Margaret Mcdermott | Daughter | — | 5 | ~1915 |
| Dolores Mcdermott | Daughter | — | 4 | ~1916 |
| Thomas Mcdermott | Head | — | 38 | ~1882 |
| Leonard Mcdermott | Son | — | 11 | ~1909 |
| Edwin Mcdermott | Son | — | ~1920 | |
| Cyril Mcdermott | Son | — | 8 | ~1912 |
| Vincent Mcdermott | Son | — | 13 | ~1907 |
| Mary Mcdermott | Spouse | — | 36 | ~1884 |
Census Appearances
1910
Dubuque, Iowa
Daughter, age 1
Dubuque, Iowa · implied b. ~1909 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | Mary C |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1920
Dubuque, Iowa
Daughter, age 10
Dubuque, Iowa · implied b. ~1910 — 11 household members
| Surname | McDermott |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | 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 Mcdermott across 2 US Census years (1910 and 1920) in Dubuque, Iowa, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcdermott
Daughter · 1920 · age 10 · b. ~1910 · Iowa
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Sibling
Dolores Mcdermott
Sibling · 1920 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Loretta Mcdermott
Sibling · 1920 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vincent Mcdermott
Sibling · 1920 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cyril Mcdermott
Sibling · 1920 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leonard Mcdermott
Sibling · 1920 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernetta Mcdermott
Sibling · 1920 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edwin Mcdermott
Sibling · 1920 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mcdermott
Sibling · 1920 · age 5
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 — Dubuque, Iowa
Open full size
1920 US Federal Census — Dubuque, Iowa
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu488unit:1244)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ernest F Kandz | 65 | Head | Farmer | Germany |
| 2 | Caroline Kandz | 56 | Wife | — | Iowa |
| 3 | George B Kandz | 19 | Son | Farm Laborer | Iowa |
| 4 | William Kandz | 18 | Son | Farm Laborer | Iowa |
| 5 | Daniel Kandz | 16 | Son | Farm Laborer | Iowa |
| 6 | Iva Kandz | 14 | Daughter | — | Iowa |
| 7 | Raphael Kandz | 12 | Son | — | Iowa |
| 8 | Herman Kandz | 10 | Son | — | Iowa |
| 9 | Loretta Kandz | 6 | Daughter | — | Iowa |
| 10 | John Kandz | 3 | Son | — | Iowa |
| 11 | Leo Kandz | 2 | Son | — | Iowa |
| 12 | Carl L Kandz | 0 | Son | — | Iowa |
| 13 | Thomas P Case | 55 | Head | Farmer | Iowa |
| 14 | Margaret R Case | 50 | Wife | — | Iowa |
| 15 | Francis V Case | 20 | Son | Farm Laborer | Iowa |
| 16 | Thomas J Case | 18 | Son | Farm Laborer | Iowa |
| 17 | Michael Case | 17 | Son | Farm Laborer | Iowa |
| 18 | Mary Case | 15 | Daughter | — | Iowa |
| 19 | William Case | 14 | Son | — | Iowa |
| 20 | John Case | 12 | Son | — | Iowa |
| 21 | Loretta Case | 10 | Daughter | — | Iowa |
| 22 | Callahan Case | 7 | Son | — | Iowa |
| 23 | Mathias J Sauer | 43 | Head | Farmer | Iowa |
| 24 | Mary K Sauer | 34 | Wife | — | Iowa |
| 25 | Barbara J Sauer | 2 | Daughter | — | Iowa |
| 26 | Joseph Urbain | 57 | Head | Farmer | Iowa |
| 27 | Catherine M Urbain | 45 | Wife | — | Iowa |
| 28 | Nora Urbain | 24 | Daughter | — | Iowa |
| 29 | Joseph Urbain | 22 | Son | Farm Laborer | Iowa |
| 30 | Frankie Urbain | 20 | Son | Farm Laborer | Iowa |
| 31 | Michael Urbain | 15 | Son | — | Iowa |
| 32 | Daniel Urbain | 12 | Son | — | Iowa |
| 33 | Cyril Urbain | 9 | Son | — | Iowa |
| 34 | Kathleen Urbain | 7 | Daughter | — | Iowa |
| 35 | Thomas Mcdermott | 38 | Head | Farmer | Iowa |
| 36 | Mary Mcdermott | 36 | Wife | — | Iowa |
| 37 | Vincent Mcdermott | 13 | Son | — | Iowa |
| 38 | Leonard Mcdermott | 11 | Son | — | Iowa |
| 39 | Mary Mcdermott THIS PERSON | 10 | Daughter | — | Iowa |
| 40 | Cyril Mcdermott | 8 | Son | — | Iowa |
| 41 | Loretta Mcdermott | 7 | Daughter | — | Iowa |
| 42 | Margaret Mcdermott | 5 | Daughter | — | Iowa |
| 43 | Dolores Mcdermott | 4 | Daughter | — | Iowa |
| 44 | Bernetta Mcdermott | 2 | Daughter | — | Iowa |
| 45 | Edwin Mcdermott | 0 | Son | — | Iowa |
| 46 | George Sr Lava | 67 | Head | Farmer | Iowa |
| 47 | Barbara Lava | 66 | Wife | — | Illinois |
| 48 | John Lava | 31 | Son | Farm Laborer | Iowa |
| 49 | Herman Kandz | 58 | Head | — | Germany |
| 50 | Agnes Kandz | 23 | Daughter | — | Iowa |
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)