Mollow's triplet bears, rightfully in my opinion, his name. Other people, maybe less fan of Mollow (at least until it became clear that he was correct) called it variously the dynamic AC Starkf effect, the resonance fluorescence spectrum (duh) and still other names. In this post, I'm trying to figure out who first called the triplet that. It wasn't Mollow.
Zoller and Ehlotzky[1] speak of Mollow's spectrum:
Knight and Miloni[2] also speak of the Mollow spectrum (but in an historical context):