Family name อำนาจศักดิ์ (Power 
, Amnartsak 
, Amnatsak ) , across the world, is a common cognomen. The cognomen อำนาจศักดิ์ is characteristic of Ireland, where it is a common surname, Guernsey, where it is quite a common surname, and Australia (explore the name in all countries). In absolute terms, the name is most common in the United States, the United Kingdom, and Canada. Much less frequently, อำนาจศักดิ์ is the forename as well as the last name.