Most concepts seem to have a particular deity unambiguously associated with them. But Time, fundamental as it is, does not—in the Greek pantheon, for example, there is Chronus, later conflated with Cronus; and several different versions of the Horae; and Aeōn.
Are there any other Greek or Roman deities specifically associated with the passage of time, or the manipulation of time? And were any specifically known as "the god of Time"? (I'm curious mostly about time in the sense of χρόνος/tempus, but deities associated with vicis, καίρος, or αἰών also qualify.)
A pretty thorough list can be found here (relevant sections in the following list are mostly copied from the linked articles):
The Greeks/Romans seem to have subdivided time and its passage into different types - eternal, regular, natural, specific lengths of time, and so on. The closest I think you get to a complete god of time is Chronus, whom you cited, but even he does not completely govern time.
This is a bit of a stretch, but wouldn't Helios be the passer of time?
Nonnus, Dionysiaca 38. 235 ff :
"[Helios the Sun speaks: ] ‘I carry the measures of time, surrounded by the four Horai (Horae, Seasons), about the same centre, until I have passed through a whole house [of the Zodiac] and fulfilled one complete month as usual . . . Against Mene the Moon [Selene] I move my rolling ball . . . and pass on my endless circuit about the turning-point of the Zodiakos, creating the measures of time.’" (emph mine)
I feel like this is a big stretch because we never see anything that mentions that Helios has been able to actually manipulate time, just this one quote that says he is the one responsible for making time fly. Also, since I don't know what greek is, I can't really check the roots either. But it's worth a shot looking at.