Zero chance the wife was anybody but Lt. McGivers. Otherwise Khan wouldn't have been wearing a starfleet delta as a necklace. "Well, dear. It's a present from an ex-girlfriend."
You mean the style of Starfleet arrowhead, set in a circle, that they didn't
have on the show back when Space Seed
was made, but which is rather more in the style of TMP?
It's a ret-Khan!