The suffix -stan on place names is usually associated with Asian countries or regions eg Pakistan, Afghanistan, Uzbekistan, Baluchistan and many others. Today, however, when reading something on early English history, I came across the Battle of Degsastan, fought in AD603 between Aedan, king of Dál Riata, an old kingdom on the west coast of Scotland, and Æthelfrith, king of Northumbria. No-one these days knows where exactly Degsastan was, although it's certainly not in Central Asia. There are other Old English names (of people and places) ending or beginning stan, too, eg Æthelstan, Dunstan and various places (in Gloucestershire, and Suffolk, eg) called Stanton, plus the common first name and surname Stanley.
The two 'stans' have different etymologies. The stan prefix denoting an Asian country goes back to the Sanskrit sthāna, meaning 'dwelling place'. The Old English stan was rock, stone, or rocky place.