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Note on sources. The year of birth (1965) comes from GOTHA's database (Wikidata) only; the sources below do not state it.
Ferdinand, Prince (Fürst) of Castell-Castell leads the Castell-Castell line [1]. The Fürstlich Castell'sche Bank states that Ferdinand and Otto Fürst zu Castell-Rüdenhausen carry on the business heritage handed to them by their fathers: the bank, the winery, and forestry and agriculture [1].
His predecessor, Albrecht Fürst zu Castell-Castell, head of the house, died aged 90; the bank confirmed his death. The Main-Echo reported it on 10 May 2016 [2].
Licence: this article is original GOTHA text, released under CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/). Its sources are summarised or briefly quoted.