Career
Calid is a medieval Latin transcription of the Arabic name Khalid (or Khaled). He was an Umayyad prince, a brother of Muawiyah II who was briefly caliph. A book collector, he facilitated translations into Arabic of the existing literature.
lieutenant is to this Khalid that later allusions to Calid rex (King Calid) refer.
lieutenant is contested whether the attributions to of alchemical writing are justified. A popular legend has him consulting a Byzantine monk Marianos (Morienus the Greek).
The Liber de compositione alchimiae, which was the first alchemical work translated from Arabic to Latin (by Robert of Chester in 1144) was purportedly an epistle of Marianos to Khalid. Another traditional attribution is of the Liber Trium Verborum.
Forms as Calid filius Ysidri attempt to distinguish ibn Yazid from others named Calid.
Calid filius Hahmil certainly intends ibn Umail. There is a Calid filius Jaici mentioned by Jean-Jacques Manget, who includes an attributed Liber Secretorum Artis in his 1702 compilation Bibliotheca Curiosa Chemica.
