Frykowski's actual birth name was Wojciech. The abbreviation of this
name is "Wojtek". "Voytek" and "Voyteck" were two awkward
quasi-phonetical representations of the proper pronunciation of
"Wojtek", which were often used by Frykowski's friends during his stay
in USA; the "Voytek" one stuck, was even used in some forms filled by
Frykowski (who never actually changed his name), and was eventually
incorrectly taken down as his real name by the Manson family
prosecutor, Vincent Bugliosi.