Born at Solavers Castle near Grüsch in the district of Prättigau/Davos in the Swiss canton of Graubünden, he was the son of Diethelm and Katharina von Werdenberg-Heiligenberg.
[1] Until 1406 he was a condottiero for the Austrians for which he received rights to the cities of Sargans, Windegg, Freudenberg and Nidberg.
On 21 January 1407 Fridrich von Toggenburg, Herr zu Brettengow und Tafas donated to his own and the salvation of his ancestors who were buried (at the Rüti church) and where he also expects to be buried, the church rights of Wangen in der March to the Rüti Monastery, sealed by Fridrich and the knights Herman von Landenberg, Johans von Bonstetten from Ustra and Herman von der Hochenlandenberg.
Following his successful invasion of Appenzell, in 1428 at the end of the Appenzell Wars, he had acquired almost all the Austrian possessions from Rheineck to Montafon as well as the county of Werdenburg from Sargans to the upper regions of Lake Zurich.
[5] The lords of Raron, Montfort-Tettnang, Sax-Misox, Brandis and Aarburg all had claims on the Toggenburg lands.