The genealogy is extremely patchy and incomplete, the family may be in fact estincted several times in the 'male line', estimated at least around 1190 and according to historical documents at 1283, even the female line was continued by Elisabeth von Rapperswil.

The line of counts of Rapperswil may be counted back to 9th century, when their ancestors were called Counts of Wandelberg:
The genealogy is extremely patchy and incomplete, the family may be in fact estincted several times in the 'male line', estimated at least around 1190 and according to historical documents at 1283, even the female line was continued by Elisabeth von Rapperswil. 
The line of counts of Rapperswil may be counted back to 9th century, when their ancestors were called Counts of Wandelberg:
House of Rapperswil