Sirname vs. Surname

Sirname and Surname Definitions
Sirname
Archaic spelling of surname
Surname
A name shared in common to identify the members of a family, as distinguished from each member's given name. Also called family name, last name.
Sirname
Archaic spelling of surname
Surname
A nickname or epithet added to a person's name.
Sirname
See Surname.
Surname
To give a surname to.
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Surname
(obsolete) An additional name, particularly those derived from a birthplace, quality, or achievement; an epithet.
Surname
(obsolete) An additional name given to a person, place, or thing; a byname or nickname.
Surname
The name a person shares with other members of that person's family, distinguished from that person's given name or names; a family name.
James is my first name, and Smith is my surname.
Surname
(Classical studies) The cognomen of Roman names.
Surname
A clan.
Surname
(transitive) To give a surname to.
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Surname
(transitive) To call by a surname.
Surname
A name or appellation which is added to, or over and above, the baptismal or Christian name, and becomes a family name.
Surname
An appellation added to the original name; an agnomen.
Surname
To name or call by an appellation added to the original name; to give a surname to.
Another shall subscribe with his hand unto the Lord, and surname himself by the name of Israel.
And Simon he surnamed Peter.
Surname
The name used to identify the members of a family (as distinguished from each member's given name)