The Reer Caynaashe also spelled Reer Caynaanshe are a royal Somali clan and were the dynastic rulers of the Habr Yunis Sultanate. They divide into 17 major sub-clans that together form the Baha Ainanshe and Rer Sugulle, from the latter descend the rulers of the Habr Yunis Sultanate. They inhabit the Togdheer and Maroodi Jeex regions of Somaliland and the Daroor, Danot and Misraq Gashamo regions of Ethiopia

The Habr Yunis Sultanate was a Somali kingdom that ruled parts of the Horn of Africa during the 18th century. It spanned the territories of the Habr Yunis clan which is part of the wider Isaaq in modern day Somaliland and Ethiopia. The sultanate was governed by the Rer Ainanshe branch of the Habr Yunis clan.