XVIII. asır hattatlarındandır. İyi derecede bir hattat olduğu yazılarından anlaşılmaktadır.

Is an XVIII. century calligraphist. It can be ascertained that he was a good calligrapherfrom his works. Afif Damadı (son-in-law) Osman Efendi was married to the daughter, EmetullahHanım (?-1770), of another XVIII. century calligraphist Afif İbrahim Efendi (?-1768)and because of this he used to pen his works in the name of his father-in-law and was subsequentlyalways known in the world of calligraphy as “Afif Damadı Osman Efendi or AfifDamadı Deli Osman.” With the publication of these records new facts have come to lightwith regard to Deli Osman Efendi. It is not known how long he was married to EmetullahHanım for. However given that Emetullah Hanımla died 36 years before Deli Osman Efendi,it cannot be supposed that they had a long married life. Despite this, perhaps because of hiswife or because of the deep love and respect he felt for his father-in-law, Deli Osman Efendikept the memory of Afif İbrahim Efendi alive by always penning his works in his name.