FRIEDRICH [I] (-after 1152). Graf von Vianden. Adalbero Archbishop of Trier confirmed donations to Kloster St Thomas bei Andernach by charter dated 1138 witnessed by "Fridericus comes de Vienna, Godefridus de Asche, Gerlacus de Isenburg et frater eius Remboldus…"[284]. Adalbero Archbishop of Trier confirmed the foundation of Kloster Lonnich by charter dated 1142 witnessed by "Walrammus comes de Arlo, Fridericus comes de Vianna, Gerlacus, Reinboldus, Sigefridus fratres de Isenburch, Heinricus de Cazenelinboge…"[285]. Vogt von Prüm. m ---. The name of Friedrich´s wife is not known. Friedrich [I] & his wife had [five] children