The Collaborative International Dictionary
Surnaming
Surname \Sur*name"\, v. t. [imp. & p. p. Surnamed; p. pr. & vb. n. Surnaming.] [Cf. F. surnommer.] 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.
--Is
-
xliv. 5.
And Simon he surnamed Peter.
--Mark iii. 16.
Wiktionary
surnaming
vb. (present participle of surname English)