Which preposition to use with andalusian

at Occurrences 1%

There was no Andalusian at this small table to serve at once as a link of sympathy between the quiet men, who would fain silence him, and a means of making unsociable persons acquainted with each other.

by Occurrences 1%

Neither Uncle Luke nor Seña Frasquita was Andalusian by birth: she came from Navarre, and he from Murcia.

Which preposition to use with  andalusian