A surname is a name added to a given name and is part of a personal name. In many cases, a surname is a family name. Many dictionaries define "surname" as a synonym of "family name". In the western hemisphere, it is commonly synonymous with "last name" and is usually placed at the end of a person's given name. In Spain and most Hispanophone and Lusophone countries, two last names (or surnames) are used. In Hungary, along with China, Korea (성씨), Japan, Vietnam and in many other East Asian countries, the family name is placed before a person's given name.
The western style of having both a family name (surname) and a given name (forename or "Christian" name) is far from universal. In many countries it is common for ordinary people to have only one name or mononym.
Read more about Surname: Order of Words, Compound Surnames, Formation, Surname Formed From A Parent's Name, Culture and Prevalence