On 17 April 1330, Zách Felicián made his famous assassination attempt, which is said to have been a sword attack on the royal family preparing to dine, wounding Queen Elizabeth of Lokietek herself. Károly Róbert (r. 1308-1342) later took terrible revenge for the attack: he had Felician's son and one of his daughters beheaded, his grandchildren given to the Johannites of Rhodes, and his other daughter Klára mutilated and dragged through the country as a deterrent.
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https://www.hungarianottomanwars.com/zach-felicians-attempt-to-kill-the-king-1330/
