The father of the Kidarite kingdom claimed to be the rightful inheritor of the Kushan Empire is called Kidaro in Greco-Bactrian script, Kidara in Brahmi script, or 寄多羅 *kètālā in Middle Chinese. His name was subsequently used as the autonym of his tribe. Henry W. Bellew (1891: 142-147) listed some of its variants including Kator, Katar, Kataur, Katoran, and Katorman and believed that the Shah-Kator princes of Chitral and Kashgar are the same people as the katar (< Kator) of Kafiristan. I hope to find out: 1) The etymology of the name. What does it originally mean? From what language? Any theory or hypothesis you would like to share? 2) The meanings of its variants/derivatives in languages (e.g., Iranian, Nuristani, Indo-Aryan, or Turkic) that borrowed or inherited it. Thank you.