I'm having trouble finding any artistic imagery of witches earlier than about 1400.
Is there a specific civilization you're looking for and define what you mean by witchcraft. Witchcraft and sorcery are ancient practices in many cultures and the taboo of practicing witchcraft or sorcery varies from society and time. I need you to be more specific before I can answer your question.
Eeh, I'm not so sure you're gonna find too much? Iirc (according to Owen Davies' Grimoires anyway) prior to the Protestant Reformation, generally when somebody got staked or otherwise in trouble for magic, it was a dude. Often a priest, scholar, or occasionally a noble. Like, in Iceland, literally everybody who got busted for magic was a dude despite a LONG pre Christian history of seidr being, socially, a lady's domain (though galdr, the other main kind of pre-jesus magic was associated with men, if memory serves). Basically, magic was associated with the ability to read, which is why artistic depictions of lady witches often have them holding books.
Not to mention, while there were witches (who self identified as such, if easy & immediate confessions that sometimes occurred during the Witch Hunts are anything to go by), there were also a lot of cunning folk; the difference being that witches were evil thieves, cunning folk served the community's needs. The authorities didn't see much of a difference, but regular folks did. They were not thrilled to see their local wise person torched at the stake or drowned.
Anyway, the history of magic is an actual field of study outside Harry Potter, so I super encourage you to read up!
(Edited to fix spelling & some clarification)