The moated castle was first mentioned around the year 1120 (1111) with B(P)ernhard de Trune. The Trauners were a noble family that was even one of the so-called “apostle families”, but was then relegated to the ministerial status of the Otakare, later the Babenbergs and finally, from 1246, the bishops of Passau. The reason for this is probably the withdrawal of fiefs or a marriage to the “worse hand”, i.e. H. an inappropriate marriage. The brothers Wernhard and Dietrich von Traun were already ministerials. They remained in possession of their ancestral castle until 1630. Then Sigmund Adam von Traun, married to Eva von Pollheim, had to sell his rule to Werner t'Serklaes von Tilly, a nephew of the general Johann T'Serclaes von Tilly, who had already acquired the rule of Tillysburg Castle, because of his Protestant faith. He managed to break the feudal bond and convert Traun into a free property. Sigmund's Catholic son Ernst Graf von Abensperg and Traun (1608–1668) was able to regain possession of the Traun castle and estate in 1664 after a long process.
After the imperially confirmed genealogical connection to the Counts of Abensberg and the resulting elevation to the rank of imperial count by Emperor Ferdinand III. Under the name Abensperg and Traun In 1653 the Trauns called themselves Counts of Abensperg and Traun. This family still owns Traun Castle today (Wikipedia).