Alor or Arorkot is the medieval name of the city of Rohri. In ancient India, Aror once served as the capital of Sindh.

Aror is the ancestral town of the Arora caste. According to the Bhavishya Purana, Parshuram attacked the Kshatriyas but eventually met one who refused to oppose the Brahmins. This caused Parshuram to gain respect for him and as a result Parshuram asked this Kshatriya to settle in Sind, in Arorkot. This Kshatriya's descendants were named after the place.

Arab historians used the words Al-rur, Al-ruhr and Al Ror to describe Aror. The basic meaning being "The Ror" as 'Al' is simply the English word 'The' in Arabic. Aror was the ancient capital of Sindh, originally ruled by the Ror Dynasty, which was followed by Rai Dynasty and then the Brahman Dynasty. Modern Rohri is now situated close to Sukkur, Sindh. In 711, Aror was captured by the army of Muslim general Muhammad bin Qasim. In 962 it was hit by a massive earthquake that changed the course of the Indus River.