Djerv
Djerv is one of the Cyrillic alphabet letters that was used in Old Cyrillic. It was used in many early Serbo-Croatian monuments to represent the sounds and . It exists in the Cyrillic Extended-B table as U+A648 and U+A649. It is the basis of the modern letters Ћ and Ђ; the former was in fact a direct revival of djerv and was considered the same letter.
Djerv was also commonly used in Bosnian Cyrillic, where it was an officially used letter. When it was combined with the letters н and л it was represented for the sounds and.Spelling Reforms and forming of the letters Ћ and Ђ
The letter Ђ was formed in 1818 by Vuk Stefanović Karadžić after several proposals of reforming Djerv by Lukijan Mušicki and Gligorije Geršić. However the letter Ћ was first used by Dositej Obradović in a direct reform of djerv.
