Which preposition to use with asturians

at Occurrences 3%

The Prefect of the first ala of the Asturians at Condercum.

from Occurrences 1%

At Condercum (Benwell) the next station, garrisoned by a cavalry corps of Asturians from Spain, a small temple was uncovered in the course of excavating, and two altars found still standing in their original position.

Which preposition to use with  asturians