From his general description and the approximate location of their town or principal place that he called 'Devana', their territory was along the northeastern coast of Scotland and is known to have included Buchan Ness, as Ptolemy refers to the promontory as 'Taexalon Promontory' (Ταίξαλον ἄκρον).
Ptolemy described a region in northeastern Scotland that he called 'Devana', whose territory encompassed areas such as Buchan Ness. He referred to this area as 'Taexalon Promontory'.