How old are Arabian horse strains?

Arabian horse strains as we know them today (i.e., family names of horses transmitted through the dam) are about 350 years old, and perhaps more, but we don’t how much more, because of the lack of written sources. The earliest mention of Arabian horses strains in Western Literature occurs in one of the several travel accounts of France’s Chevalier d’Arvieux (b. 1635 – d. 1702), “Voyage a la Palestine”.  Published in Paris in 1717, it was translated into English in 1718 and published in London as “Travels in Arabia the Desart”, sixteen years after d’Arvieux death. Chapter XI, “Of the Arab Horses” has the following mention: “A Marseilles Merchant that liv’d at Rama, was Part’ner so in a Mare with an Arab whose Name was Abrahim Abou Vouasses: This Mare, whose name was Touysse, besides her Beauty, her Youngness, and her Price of Twelve hundred Crowns, was of that first noble Race. That Merchant had her whole Genealogy, with her Descent both of the Sire’s and Mother’s side, up to Five hundred Years of antiquity, all from public Records…” “Touysse”, the colloquial form of Tuwayssah, is clearly the earliest mention of any strain in Western literature. “That first noble race” refers to the “Kehhilan”, (or Kuhaylan…