Występują różne daty dot. urodzenia Johna Entenzy: 1905, 1904, 1903.

Kp. Arts & architecture 1945-1949 / directed and produced by Benedikt Taschen. - Köln, cop. 2014. S. red.: (Editors: John Entenza, 1943-1962).

MSHDA, 27.01.2015 (John Etenza, 1904-1984, born in Calumet, Michigan, in 1904. He died in Chicago in May 1984) http://www.michiganmodern.org/designers/john-entenza

NationMaster, 27.01.2015 (John Etenza, 1903-1984) http://www.statemaster.com/encyclopedia/John-Entenza

howold.co, 27.01.2015 (John Etenza born in Calumet, Michigan, USA (78 years old) (December 4 1905 - April 27 1984 [...])) http://howold.co/john-entenza