It was deleted. PM Frollein Gladys if you have questions. Here is the entrant:
Given Name KALĊIDON
GENDER: Masculine
USAGE: Maltese
CONTRIBUTOR: Ambiversion on 4/26/2016
LAST EDITOR: Frollein Gladys on 5/21/2016 [revision history]
Meaning & History
From the ancient Megarian settlement of Chalcedon (a Latinisation of its Ancient Greek name Khalkedon) wherein the Council of Chalcedon took place in 451AD, a council which principles would later be accepted by the Roman Catholic Church, the predominant religion in Malta. The name of the town is related to Ancient Greek khalkós meaning "copper".
Notes
https://en.wiktionary.org/wiki/%CF%87%CE%B1%CE%BB%CE%BA%CF%8C%CF%82#Ancient_Greekhttps://en.wikipedia.org/wiki/Chalcedon
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The sources offered by OP prove the existence of the word and of the town. I can't find it as a given name, though