Oneilland East (from Irish Uí Nialláin, the name of an ancient Gaelic district)[2][3] is a barony in the north-east of County Armagh, Northern Ireland.

Carrickblacker House is in Oneilland East,[1] and is the home of the Blacker family.

[6] The Blacker family are claimed as being descended from the Viking Blacar, who was a King of Dublin.

[6] On 26 February 943, Blacar defeated Muirchertach mac Néill and his army, near Armagh, allegedly by the River Bann where Carrickblacker now stands.

This article related to the geography of County Armagh, Northern Ireland is a stub.