Dje corresponds to the Latin letter D with stroke (Đ đ) in Gaj's Latin alphabet of Serbo-Croatian and is so transliterated. When strokes are unavailable, it is transliterated as ⟨Dj dj⟩ or ⟨Ď ď⟩.
History
Dje was constructed by request of Vuk Stefanović Karadžić.[1] There were several proposed shapes of the letter (one by Pavle Solarić, another by Gligorije Geršić). The variant now in use was designed by Lukijan Mušicki;[2][3][1] it was designed by modification of the letter Ћ, itself a revival of the old Cyrillic letter Djerv (Ꙉ).[1] The new letter was adopted in Karadžić's 1818 dictionary and thus entered widespread usage.[1] There was also a Д and Ь ligature variant that hasn't been added in Unicode as a character, and was used before Dje took its current form.