Djerv
Djerv or Đerv is one of the Cyrillic alphabet letters that was used in Old Cyrillic. It was used in many early Serbian 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.