Abubakr Esfarayeni
Abd Allah ibn Ahmad ibn Muhammad Asfara'ni, also written Esfarayeni, known as Abu Bakr was a Persian physician from Esfarayen, North Khorasan, Iran.
His treatise, entitled Zubdat al-bayan fi ‘ilm al-abdah, is preserved in a unique copy now in the collections of The National Library of Medicine. They were active before 1826.