Family name สงวนสิทธิ์ (สงวนสิทธิ์ 
, Sanguansit , All Rights Reserved) , globally, is a rare cognomen. The last name สงวนสิทธิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, สงวนสิทธิ์ is the forename as well as the last name.