Definition, synonyms and related words
plural of surname
"Many families in my village share common surnames because they all descend from a single ancestor."
Third-person singular simple present indicative form of surname
"She surnames all her friends to create a unique puzzle game for them."
In plain English: You cannot use surnames as a verb because they are only proper nouns used to identify family names, not actions you can perform.
"The old family has never surnamed anyone with their name in modern times, so they only use it for very distant relatives who adopted it centuries ago."