In 697 legends mentions a knight called Raprecht in connection with the later Grynau Castle.
The former seat of the Vogt in Altendorf was first mentioned as "Rahprehteswilare" in a document of emperor Otto II, in which goods of the Einsiedeln abbey were confirmed on 14 August 972.

The fourth Abbot of Einsiedeln, Wirunt (996–1026), or Wirendus, Wirund, Wem, Wirand, Verendus, was according to 15th-century chronists a Graf von Wandelburg of the Rapperswil family.
Wandelburg may be another name of the Grynau Castle at the Buechberg hill on Obersee lake shore.
According to the abbey's archives there are no reliable sources about Wirunt's origin.
Other unreliable sources mention that Rudolf I (1090–1101) the 9th abbot was a member of the Rapperswil family.
Ulrich I von Rapperswil (1192–1206) became the 14th abbot of Einsiedeln.

In 1099 first mentioned, the donation of the St. Andreas Church was given by the House of Rapperswil as a spacious three-naved country church.
The assumably legal connection with the church situated above the Uster Castle, due to the archaeological investigations of 1982 so far is not proven, but the pastoral rights were sold by Elisabeth von Rapperswil not earlier than 1300.
Some fortifications, among them in Greifensee, Uster and Alt-Rapperswil were built probably in the early 12th century by members of the family.
The Vogts of Rapperswil were persons of influence in the so-called Marchenstreit between the people of Schwyz and the Einsiedeln abbey beginning around 1100.
Around 1180 the lords of Rapperswil inherit the parish rights of Weisslingen and free float in Russikon, Erisberg, Luckhausen, Moosburg and in Kempthal, as well as the castles Greifenberg and Bernegg, and the bailiwick of Kempten in the area around the Töss Valley respectively in Eastern Switzerland.

Assumably in compensation of claims related to the Alt-Rapperswil lands and rights, a change of goods occurred to establish the Bubikon Commandry, given by the Counts of Toggenburg and by the Counts of Rapperswil between 1191 and 1198.
Although in concurrency to the neighbouring Rüti Abbey that was founded in 1206, the commandery's lands and goods grew with donations by local noble families during the 13th and 14th centuries.
In 697 legends mentions a knight called Raprecht in connection with the later Grynau Castle. The former seat of the Vogt in Altendorf was first mentioned as "Rahprehteswilare" in a document of emperor Otto II, in which goods of the Einsiedeln abbey were confirmed on 14 August 972.
The fourth Abbot of Einsiedeln, Wirunt (996–1026), or Wirendus, Wirund, Wem, Wirand, Verendus, was according to 15th-century chronists a Graf von Wandelburg of the Rapperswil family. Wandelburg may be another name of the Grynau Castle at the Buechberg hill on Obersee lake shore. According to the abbey's archives there are no reliable sources about Wirunt's origin. Other unreliable sources mention that Rudolf I (1090–1101) the 9th abbot was a member of the Rapperswil family. Ulrich I von Rapperswil (1192–1206) became the 14th abbot of Einsiedeln.
In 1099 first mentioned, the donation of the St. Andreas Church was given by the House of Rapperswil as a spacious three-naved country church. The assumably legal connection with the church situated above the Uster Castle, due to the archaeological investigations of 1982 so far is not proven, but the pastoral rights were sold by Elisabeth von Rapperswil not earlier than 1300. Some fortifications, among them in Greifensee, Uster and Alt-Rapperswil were built probably in the early 12th century by members of the family. The Vogts of Rapperswil were persons of influence in the so-called Marchenstreit between the people of Schwyz and the Einsiedeln abbey beginning around 1100. Around 1180 the lords of Rapperswil inherit the parish rights of Weisslingen and free float in Russikon, Erisberg, Luckhausen, Moosburg and in Kempthal, as well as the castles Greifenberg and Bernegg, and the bailiwick of Kempten in the area around the Töss Valley respectively in Eastern Switzerland.
Assumably in compensation of claims related to the Alt-Rapperswil lands and rights, a change of goods occurred to establish the Bubikon Commandry, given by the Counts of Toggenburg and by the Counts of Rapperswil between 1191 and 1198. Although in concurrency to the neighbouring Rüti Abbey that was founded in 1206, the commandery's lands and goods grew with donations by local noble families during the 13th and 14th centuries.
House of Rapperswil