Around the world, สิทธิธัช (สิทธิธัช 
, Sittithat , Sittituch ) is a very rare largely masculine, but uncommonly feminine first name. The first name สิทธิธัช is habitual in South-eastern Asia, particularly Thailand, where it is a very rare dominantly boy's, but infrequently female name. Much less frequently, สิทธิธัช is the last name as well as the forename.
จิรปรมัตถ์, จุลเนตร, ศิลาทอง, ศรีมาเสริม, ธิติกุลเกษมศักดิ์, วัฒนาจารุพงศ์, and ฤทธิไกรรณการ