When was it in history that leaders got the suffix -star added on? Since I imagine this wasnโt always the common place for Clan leaders. And when it became accustomed for leaders to get a special suffix to say โIโm leader now,โ was it always -star or were there more suffixes once upon a time similar to how Seers have different ones depending on the Clan (-leaf/-stone/-light/-feather). Suffixes that gradually decreased throughout history until it was just -star remained
Leaders initially worked more closely with seers around the time the position of seer became a thing, and to honor the fact that leaders were taking on both the role of holy interpreter and head of a community, they were given a special suffix, that being -star. It had been a topic of discussion up to that point to give leaders a specific name anyways, so once StarClan was established in religion... well, that was the perfect suffix to use.
Seers are a more recent invention, relatively. Oracles, preachers, spirit-talkers, whatever you want to call them, they exist in pretty much every species, but they weren't given a specific role in the Clans until later on, when the visions and dreams started having a recognizable pattern throughout the territories. That's why the seer suffixes were a later addition to the roster.













