Hi, I can answer that! I'm Sonya, and I'm part of the Joilly staff. The name originated from a visual novel centered around the theme of French Brasserie. Since the french word for video game, jeux de video, and french word for fun 'joie' both started with J, we wanted a fun sounding word that started with J. So together with 'joie' and 'jolly' a fun English word, we deemed the name Joilly.