Last name is surname/family name lo. Ang Mo likes to put the surname at the back hence it's also known as last name.
really ancient china ish same same, use 1st name. surname or family name ish usually hidden/not mentioned.
only after patriarchy system (follow the father's family name) ish established, then slowly family name ish put in front.
but it still took a long time. from
周公旦 (2nd king of zhou) to
秦王政 (qin shihuang), all ish use 1st name, surname usually omitted.
even commoners like
孟姜(女) , the surname ish last name. the eldest (
孟 ) dotter of the
姜 family.
other examples would be
妲己 ,
褒姒 , all ish family name at the back.