In all the world, สิทธิวัจน์ (สิทธิวัจน์ 
) is a very rare male forename. The forename สิทธิวัจน์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare boy's name. Likewise, สิทธิวัจน์ is the last name as well as the forename.