Alexandria Bucephalous, a city founded by Alexander the Great, was located on the Jhelum River, but it's exact location is still unknown.
The exact site of the city is still unknown but several locations have been proposed: Founded in May 326 BC, the town was located on the Hydaspes (Jhelum River), east of the Indus River. Alexandria Bucephalous (also variously known as Alexandria Bucephalus, Alexandria Bucephala, Bucephala, or Bucephalia), was a city founded by Alexander the Great in memory of his beloved horse Bucephalus. 
