Kunigunde Mackamotzki was the original name of Cora Turner, stage name Belle Elmore, who was the second wife and presumed victim of Dr. Hawley Harvey Crippen, who was convicted of her murder and executed. (Recent DNA tests on her supposed remains cast doubt on their identity (and even their gender!), but this is disputed.)
The first element is actually Gothic 'kuni' ('chunni' in Old High German) "family, descent, stock, tribe." It is common that people confuse it with 'cônja' ('kuoni' in Old High German) "brave" - but the correct element here really is 'kuni', not 'kuoni.' [noted -ed]