Save Gender Masculine Usage Thai Scripts อิทธิศักดิ์(Thai) Pronounced Pron. eet-tee-SAK [key·IPA] Other Forms FormsIttisak, Ithisak, Itisak, Aitthisak, Aittisak, Aithisak, Aitisak Meaning & History From Thai อิทธิ (itthi) meaning "power, might" and ศักดิ์ (sak) meaning "power".