Not the same as Hercules, a Roman mythological character associated with Heracles.
Non-Latin script reference not evaluated.
Sophocles. Electra and other plays, 2010 page 332 (Herakles)
Brill's new Pauly online, 20 June 2014 (Heracles; Ἡρακλῆς; originally called Alcides or Alcaeus the most prominent Greek hero in myth and cult; connected with Thebes, Argos, And Trachis; name connected with Hera in antiquity; son of Zeus and Alcmene; identified with a large number of non-Greek gods and heroes; he was taken over as Hercle by the Etruscans, as Hercules by the Romans)
Wikipedia, 20 June 2014 (Heracles; Ἡρακλῆς; Herakliu; Alcaeus; Ἀλκαῖος; Alcides; Ἀλκείδης; divine hero in Greek mythology; son of Zeus and Alcmene, foster son of Amphitryon; greatest of the Greek heroes; associated with the Roman hero Hercules; other forms of name: Herakles; هيراكليس; Herakl; Heraklo; Херакъл; Гэракл; Геракл; هرکول; Earcail; 헤라클레스; Eracle; ף הרקולס ; Hērakls; Heraklis; Héraklész; ヘーラクレース; Héthacl'ye; Eracles; Heracle; Heraklej; 赫拉克勒斯)