I’ve always heard that Kronus (Titan of the Harvest) and Chronos (God/Personification of Time) are often confused by modern people but were actually considered two distinct beings in Ancient Greece. Multiple answers on this very site mention this point.
However, the Wikipedia article about Kronus lists many prominent ancient authors (Cicero, Plutarch, etc) who also considered him to be associated with time:
During antiquity, Cronus was occasionally interpreted as Chronos, the personification of time. The Roman philosopher Cicero (1st century BCE) elaborated on this by saying that the Greek name Cronus is synonymous to chronos (time) since he maintains the course and cycles of seasons and the periods of time, whereas the Latin name Saturn denotes that he is saturated with years since he was devouring his sons, which implies that time devours the ages and gorges.
The Greek historian and biographer Plutarch (1st century CE) asserted that the Greeks believed that Cronus was an allegorical name for χρόνος (time). […] Proclus (5th century CE), the Neoplatonist philosopher, makes in his Commentary on Plato's Cratylus an extensive analysis on Cronus; among others he says that the "One cause" of all things is "Chronos" (time) that is also equivocal to Cronus.
Indeed, the article indicates that writers from multiple eras considered them to be the same, from Greek (Plutarch, above) to Roman (His association with the "Saturnian" Golden Age eventually caused him to become the god of "time") to the Renaissance (…the identification of Cronus and Chronos gave rise to "Father Time" wielding the harvesting scythe).
What that article does not mention is any counter-arguments from ancient sources: it doesn’t provide any specific sources that describe them explicitly as two distinct deities.
So if a bunch of Greeks considered Kronus and Chronos to be the same being, and the Romans did too, and the people of the Renaissance did too… who didn’t? Is there some other document that specifically delineates them as being separate? It can’t just be the slight difference in spelling, right, not with so many ancient sources specifically saying they were the same? If spelling was more important than direct sources, we’d be treating Genghis Khan and Chinggis Kan as two different people.
So where did this idea that Kronus the Titan is explicitly NOT associated with time come from?
EDIT: I found one comment online that indicated that the Orphic Greeks were the ones who insisted that they were two different beings, while “mainstream” Greeks treated them as one, but again it didn’t provide any specific sources.