Wali al-Ahd

Arabic or Islamic term for a crown prince

Photo of both sides of a silver coin with Arabic inscriptions — Silver dirham, minted at Isfahan in 817 CE, citing al-Ma'mun as caliph and Ali al-Ridha as heir apparent (wali ahd al-muslimin)

Wali al-Ahd (Arabic: ولي العهد, romanized: Walī al-ʿAhd) is the Arabic and Islamic term for a designated heir of a ruler, or crown prince.