Man originally meant person, and the word for a male person had a prefix as well, just like woman.
I know of no archaic English words for "man" or "person" that consist of "man" with a prefix. There's freke, gome, lede, segge, tulk, and so on - but nothing ending in "man" except "man(ne)."
"Man" (or "manne") has meant "man" for as long as it's meant anything. The male human being has always been normative, and the female has been exceptional - the human being with a difference, the womb-man.
This difference doesn't have to be derogatory. But in Western culture it has been; there's no point in denying that men have had the upper hand.
Whether you approve of "womyn" or not, there is a valid linguistic point behind it.