According to the map images in The Valdemar Companion, the kingdom of Brendan is bordered to the north by Thurbrigard, west by Ruvan, south by Seejay (west) and the Altvar Confederation (east), with the kingdom of Isiro having a narrow northeastern border, the Grand Empire of the Hinar having an eastern border which is even narrower, and to the southeast by a kingdom named Ambon, with most of their east border being with Agedia, which causes the narrow mountainous border connection with the stated Empire.
The capital of Brendan is a city named High Kingdom Hall.