surname
n. countablen. the name you share with your family. In many cultures, it is the name that comes last.
n. the hereditary name shared by members of a family. Often follows the given name in Western naming conventions.
My first name is David and my surname is Smith.
Please write your surname in capital letters on the application form to avoid any confusion with your middle name.
In some cultures, the surname precedes the given name, reflecting a traditional emphasis on family lineage over individual identity within formal social structures.
Inherited from Middle English surname, a partial calque of Old French surnum, surnoun (“surname; nickname”) (whence Middle English surnoun), from Late Latin supernōmen, suprānōmen (“surname”), from super- (“over, above, beyond”) and nōmen (“name”), equivalent to sur- + name.
Commonly referred to as a 'last name' or 'family name' in North American English.