While I agree with you, I just wanted to point out that Chrischona and Jerg are indeed legit names. Jerg is an Upper
German variant of
Jörg which mostly survived as a surname. There are still a handful of bearers who have this as a first name, though (many of them in the
German state of Baden-Württemberg). Chrischona is an old Alemannic variant of
Christiana. According to legend,
Saint Chrischona was one of the companions of
Saint Ursula. She's somewhat of a regional saint to the city and the region surrounding the Swiss city of Basel which is why the name was predominantly found in that area (as far as I can tell, though, the name went extinct in the mid to late 1600s). That's also the reason why I asked Dianatiger if her Chrischona was by any chance from that area.