Save Gender Masculine Usage Thai Scripts อิทธิศักดิ์(Thai) Pronounced Pron. eet-tee-SAK [key·IPA] Other Forms FormsItthisak, Ithisak, Itisak, Aitthisak, Aittisak, Aithisak, Aitisak Meaning & History Alternate transcription of Itthisak.