Syriac alphabet
The Kharosthi script is an Arabic-derived alphasyllabary used in the Indo-Greek Kingdom in the 3rd century BC. The Syriac alphabet is the derived form of Aramaic used in the early Christian period. The Sogdian alphabet is derived from Syriac. It is in turn an ancestor of the Old Uyghur. The Manichaean alphabet is a further derivation from Sogdian.