Ja'ekha (pronounced /dʒæˈɛxɑː/; from Trellinese Jahë Akhen, meaning "between waters"), officially the Grand Duchy of Ja'ekha (Trellinese: Berend Serekh Ja'ekhika), is a province of the Trellinese Empire. It is the eighth most populous province in Trellin and Hysera and the ninth largest by total area.
Ja'ekha is bordered to the northwest by Retikh, to the north by Fymona and Asketon, to the east by Kur'mala and the Dangish Empire, by Namija in the south and by the Sea of Velar to the west. It has a population of 12,691,541 and covers a total area of roughly 114,931 square kilometres. The province's capital is at Azhedar.