Which preposition to use with dunster

at Occurrences 1%

Mr. Tapster had already singled out Bubbles Dunster at dinner the night before.

on Occurrences 1%

Timberscombe, a small wayside village, 3 m. S.W. of Dunster on the Dulverton road.

over Occurrences 1%

"I can't help thinking that in some inexplicable way I pushed Bubbles Dunster over the edge of that embankment.

Which preposition to use with  dunster