Werd krankzinnig verklaard en was vanaf 1507 (of 1508 of 1509) koningin onder regentschap van haar vader Ferdinand II. Vanaf 1516 onder regentschap van haar zoon Karel I.
When copying data from this family tree, please include a reference to the origin: Andre Ottenhoff, "Family tree Ottenhoff - Schilder", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ottenhoff/I21814.php : accessed January 8, 2026), "Johanna (de Waanzinnige) van Castilië (1479-1555)".
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