first-name

UK: /ˌfɜː^rstˈneɪm/

WordReference Random House Unabridged Dictionary of American English © 2025

first′ name′. 

1. See given name. 

• Middle English 1200–50

first-name  (adj. fûrst′nām′;v. fûrst′nām′), adj., v., -named, -nam•ing. 
adj. 

1. of or pertaining to one's first, or given, name;
   familiar;
   intimate:
   They were on a first-name basis soon after meeting.

v.t. 
2. to address (someone) by his or her first name, esp. as a sign of informality or familiarity:
   The boss doesn't like the employees to first-name her.