WM
William Mcdermott — 1930 US Census Record
Model Tree available1930 United States Federal Census · Cook, Illinois
Our Model Tree links this William Mcdermott across the 1910, 1920 and 1930 US Censuses in Cook, Illinois (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1904), then head of a 7-person household.
Age 26
b. ~1904
Male
Son
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | McDermott |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| Age at First Marriage | 9591 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Occupation | Lumber |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Lumber |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1904 |
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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Grace Mcdermott | Daughter | — | 19 | ~1911 |
| James Mcdermott | Son | — | 17 | ~1913 |
| William Mcdermott | Head | — | 58 | ~1872 |
| Anna Mcdermott | Spouse | — | 57 | ~1873 |
| Thomas Mcdermott | Son | — | 13 | ~1917 |
| William Mcdermott | Son | — | 26 | ~1904 |
| Frank Kelly | Other | — | 29 | ~1901 |
Census Appearances
1910
Cook, Illinois
Son, age 6
Cook, Illinois · implied b. ~1904 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Cook, Illinois
Son, age 16
Cook, Illinois · implied b. ~1904 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Messenger |
| Industry | Steam R. R. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 26
Cook, Illinois · implied b. ~1904 — 7 household members
| Surname | McDermott |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| Age at First Marriage | 9591 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Lumber |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 William Mcdermott across 3 US Census years (1910, 1920 and 1930) in Cook, Illinois, using XGBoost record linkage. Identified parents: father William Mcdermott (~0.92 confidence) and father William Mcdermott (~0.92 confidence) and mother Anna Mcdermott (~0.92 confidence) and mother Anna Mcdermott (~0.92 confidence) and mother Anna Mcdermott (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Mcdermott
b. ~1880
Source father
● Household
· direct · ~0.92
Father
William Mcdermott
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Anna Mcdermott
b. ~1873
Source mother
● Household
· direct · ~0.92
Mother
Anna Mcdermott
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Anna Mcdermott
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Mcdermott
Son · 1930 · age 26 · b. ~1904 · Illinois
★ You are viewing this record
Sibling
Thomas Mcdermott
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Grace Mcdermott
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mcdermott
Sibling · 1930 · age 17
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
1930 US Federal Census — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel463:0086)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Geo De Vries | 27 | Head | Salesman | Illinois |
| 52 | Mildred De Vries | 20 | Wife | — | Illinois |
| 53 | Margaret Ureguay | 53 | Head | — | Michigan |
| 54 | Margaret Ureguay | 27 | Daughter | School Teacher | Michigan |
| 55 | William Ureguay | 31 | Son | Salesman | Michigan |
| 56 | Laura O'Hara | 60 | Head | — | Ohio |
| 57 | Stanley Bazarus | 36 | Son-in-law | Railroad | Germany |
| 58 | Frieda Bazarus | 31 | Daughter | — | Illinois |
| 59 | Mary Bazarus | 36 | Daughter | Dentist'S Assistant | Illinois |
| 60 | Earl Bazarus | 45 | Son | Mgr. | Illinois |
| 61 | Lee Cupp | 45 | Head | Mgr. | Illinois |
| 62 | Stella Cupp | 49 | Wife | — | Illinois |
| 63 | J. B. Huckel | 38 | Head | Truck Driver | Illinois |
| 64 | Anna Huckel | 28 | Wife | — | Illinois |
| 65 | Robert Huckel | 18 | Son | — | Illinois |
| 66 | Thomas Ryan | 45 | Head | Prohibition Agent | Illinois |
| 67 | Anna Ryan | 43 | Wife | — | England |
| 68 | John Ryan | 20 | Son | — | Illinois |
| 69 | William Ryan | 19 | Son | — | Illinois |
| 70 | Thomas Ryan | 16 | Son | — | Illinois |
| 71 | Mary Ryan | 11 | Daughter | — | Illinois |
| 72 | Irvin La Sage | 27 | Head | Dressing | Wisconsin |
| 73 | Edith La Sage | 27 | Wife | — | Illinois |
| 74 | James La Sage | 4 | Son | — | Illinois |
| 75 | Catherine Lenz | 27 | Roomer | Milliner | New York |
| 76 | Margaret Dixon | 66 | Head | — | Illinois |
| 77 | Catherine Mcallister | 54 | Sister | — | Illinois |
| 78 | Catherine Mcallister | 15 | Niece | — | Illinois |
| 79 | George O'Connor | 26 | Nephew | Helper | Illinois |
| 80 | Fred O'Connor | 24 | Nephew | Office | Illinois |
| 81 | Frank Kelly | 39 | Head | Hauling Engineer | Illinois |
| 82 | Lillian Kelly | 46 | Wife | — | Illinois |
| 83 | William Mcdermott | 58 | Head | Steam Fitter | Illinois |
| 84 | Anna Mcdermott | 57 | Wife | — | Illinois |
| 85 | William Mcdermott THIS PERSON | 26 | Son | Lumber | Illinois |
| 86 | James Mcdermott | 17 | Son | — | Illinois |
| 87 | Thomas Mcdermott | 13 | Son | — | Illinois |
| 88 | Grace Mcdermott | 19 | Daughter | — | Illinois |
| 89 | Frank Kelly | 29 | Nephew | Chauffeur | Illinois |
| 90 | Emil Guld | 60 | Head | Salesman | Illinois |
| 91 | Agnes Guld | 55 | Wife | — | Illinois |
| 92 | Harold Guld | 26 | Son | Salesman | Illinois |
| 93 | Edwin Guld | 14 | Son | Clerk | Illinois |
| 94 | Earle Guld | 16 | Son | — | Illinois |
| 95 | Anna Daly | 64 | Head | — | Canada |
| 96 | Leo Daly | 33 | Son | Machinist | Illinois |
| 97 | Joseph Daly | 26 | Son | Office | Illinois |
| 98 | Arthur Daly | 25 | Son | Salesman | Illinois |
| 99 | Elizabeth Fitzgerald | 40 | Head | Steno | Illinois |
| 100 | Mary Fitzgerald | 34 | Sister | Price Clerk | Illinois |
Related Census Records
Pedigree Summary
William + 3 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)