Its original name and position in the Bactrian alphabet, if it had any, are unknown. Some authors have called it "san", on the basis of the hypothesis that it was a survival or reintroduction of the archaic Greek letter San.
The original name and placement within the Bactrian alphabet, if any, remain unknown.  Some researchers suggest calling it "san" due to the theory that it is a surviving or revived form of the ancient Greek letter San.