All around the world, เถียร (เถียร 
) is a very rare largely feminine, but seldom boy's first name. The first name เถียร is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare mostly female, but uncommonly male name. Much less frequently, เถียร is the last name as well as the forename.
สมสอาด, เพ็งทอง, แสงสกุล, เลิศจันทร์, เครือดี, and หวังสวาสดิ์