The first time Zeilarn was mentioned in a document was in 788 as Cidlar in the index of the archdiocese Salzburg. Later the village belonged to the county Leonberg, after its extinction in 1319 the counts of Hals inherited the properties.
In 788, Zeilarn was first recorded as Cidlar in the Salzburg archdiocese index. Later, the village came under the jurisdiction of the Leonberg county; after it vanished in 1319, the Hals counts took possession of its properties.