The name which identifies you as a member of a particular family: your family name or patronymic In Western cultures, it is usually the last name; in Eastern cultures, it is often the first name
Your surname is the name that you share with other members of your family. In English speaking countries and many other countries it is your last name. She'd never known his surname. the name that you share with your parents, or often with your husband if you are a married woman, and which in English comes at the end of your full name = last name, family name family name (sur- (from ; SURCHARGE) + name)
To name or call by an appellation added to the original name; to give a surname to
A name that indicates to which family a person belongs, normally following that person's given name(s) in Western culture, in English included, and preceding it in Eastern