The following material 
on the immediate ancestry of 
John Wayne Gacy
should not be considered either 
exhaustive or authoritative, but 
rather as a first draft.
Rob Martindale contributed to this report.
| Ancestry of John Wayne Gacy | |
|---|---|
| 1 | John Wayne Gacy Jr., b. Edgewater Hospital, Chicago, Ill., 17 March 1942, d. Joliet, Ill., 10 May 1994 [SSDI 344-34-3840] | 
| PARENTS | |
| 2 | 
John Wayne Gacy,
b. ... , Ill., 20 June 1900,
d. ... Dec. 1969
[SSDI 337-10-9084]
 m.  | 
| 3 | Marion Elaine Robinson, b. Racine, Wisc., 4 May 1908, d. Cabot, Ark., ... Dec. 1989 [SSDI 334-09-5008; Chicago Sun-Times 10 Dec. 1989] | 
| GRANDPARENTS | |
| 4 | 
Nicodemus Gatza/Gaca/Gacy,
b. ... , Poland, ... July 1870,
d. ... [by 1910, living 1900]
 m. ... [ca. 1891]  | 
| 5 | Veronica ... , b. ... , Poland, ... Feb. 1872, d. ... July 1948 [Chicago Tribune 25 July 1948] | 
| 6 | 
 ... Robinson,
b. ... ,
d. ... 
 m.  | 
| 7 | ... , b. ... , d. ... | 
| GREAT-GRANDPARENTS | |
| GREAT-GREAT-GRANDPARENTS | |
| GREAT-GREAT-GREAT-GRANDPARENTS | |
1930 Illinois, Cook Co., Chicago, ED 2698, sheet 4A, line 32
Gaca Veronica    H    F W 60 Wd     P  P  P
     John        S    M W 28 S      IL P  P     Toolmaker      Gauges
     Agnes       D    F W 25 S      IL P  P     Hemstitcher    Novelty Store
P = Poland
--------
1920 Illinois Cook Co., Chicago, ED 953, sheet 4A, line 44
Gacia Veronica    H    F W 48 Wd   1889 Na 1893    P P P
      Edward      S    M W 24 S                    IL P P     Wood Finisher    Phonograf Co
      John        S    M W 20 S                    IL P P     Assembler        Steam Gauge Co
      Leon        S    M W 18 S                    IL P P     Press Opeator    Machine Shop
      Agnes       D    F W 16 S                    IL P P     Sur Operator     Telephone Co
P = Poland
--------
1910 Illinois Cook Co., Chicago, ED 763, sheet 18B, line 99, continued on sheet 19A
Gaca Veronica      H   F W 37 Wd  7 7   G  G  G    1890     Washerwoman    Private Family
     Rose          D   F W 17 S         IL G  G             Laborer        Candy Factory
     Edward        S   M W 16 S         IL G  G             Errand Boy     Tailors
     Wladyslawa    D   F W 14 S         IL G  G             Laborer        Biscuit Factory
     Apolonia      D   F W 11 S         IL G  G
     John          S   M W  9 S         IL G  G
     Leon          S   M W  7 S         IL G  G
     Agnes         D   F W  5 S         IL G  G
G = Ger/Polish
--------
1900 Illinois, Cook Co., Chicago, ED 533, sheet 17A, line 23
Gatza Nicodem      H    W M Jul 1870 38 M 9       P  P  P     1885 15 Not    Painter
      Veronica     W    W F Feb 1872 28 M 9 4 4   P  P  P     1890 10
      Rosalia      D    W F Sep 1893  7 S         IL P  P                    At School
      Edward       S    W M Sep 1894  6 S         IL P  P
      Ladislawa    D    W F Sep 1895  5 S         IL P  P
      Apolonia     D    W F Feb 1896  4 S         IL P  P
P = Poland
--------