Eberhard I of Habsburg-Laufenburg
Eberhard I of Habsburg-Laufenburg (c. 1235–1284) was the fourth son of Count Rudolf I of Laufenburg. In 1271 he married Anna, heiress daughter of Count Hartmann V of Kyburg, which gave him Anna's Kyburg inheritance and founded the Neu-Kyburg line.
To clear heavy debts, he and Anna sold the town of Fribourg to King Rudolf in 1277 for 3040 marks of silver. His son Hartmann I succeeded him as count of Kyburg.