Kuhaylat al-Aadiyat
One of the main reasons why some strains do not appear in the Abbas Pasha Manuscript is that they had not been formed or named yet. One example is Kuhaylan Hayfi in Northern Arabia, and another is Kuhaylan Al-Aadiyat in Bahrain. The latter strain is peculiar to Bahrain, stemming from a Kuhaylah Ajuz of the Bedouin Shaykhs of the ‘Ajman tribe, gifted to Bahrain at the turn of the XXth century. The story of how it was named is told here.
Note that both Kuhaylat al-Aadiyat and Kuhaylat Umm Surayyir/Zurayr both came to Bahrain from the ‘Ajman tribe of Eastern Arabia. Lady Anne Blunt already noted the ‘Ajman original provenance of many of the Bahrain strains.
The two strains may actually be one and the same. That is a possibility.
Do you know of a strain “Asgar” or “Hasgar”? Or sounding something like that?
Hazkan/Hazgan exists. It was the strain of Shour, Lord Kitchener’s horse from the Tahawis and an RAS foundation horse. Where did you come across that spelling?