Fallomon mac Con Congalt

Fallomon mac Con Congalt (died 766), also written Follaman mac Con Congelt, was King of Mide, a kingdom of the Uí Néill in central Ireland in modern County Westmeath and County Meath.

Fallomon belonged to the Clann Cholmáin Bicc branch of the southern Uí Néill, a kin group which traced its descent from Colmán Bec, son of Diarmait mac Cerbaill and, rather less certainly, from Niall of the Nine Hostages. Clann Cholmáin Bicc's own lands lay around Lough Lene, in Mide, the west-central part of the southern Uí Néill kingdoms, from which the names Meath and Westmeath are derived. The remainder of the southern Uí Néill formed the kingdoms of Tethbae, in the north-west midlands, north and west of the River Inny and east of the River Shannon, and Brega in the east midlands, east of the upper part of the River Boyne and its tributary the River Blackwater. The leading branch of Clann Cholmáin Bicc was later known as the Coille Fallomain, or Caille Follamain, after Fallomon himself. Its name is preserved in that of Killallon, some miles north-west of Clonmellon.

Clann Cholmáin Bicc were perhaps in the shadow of the neighbouring Clann Cholmáin, in full Clann Cholmáin Máir, the descendants of Colmán Bec's brother Colmán Már, whose lands lay to the south-west around the hill of Uisnech. Until the 8th century, both were in a secondary position, the leadership of the southern Uí Néill being held by the Síl nÁedo Sláine of Brega, descended from Diarmait's son Áed Sláine. During the period when the Síl nÁedo Sláine were dominant in the midlands, only one descendant of Colmán Bec was prominent, his son Óengus mac Colmáin who may, perhaps, have been King of Tara, or more probably was appointed as deputy in the midlands—he is called "king of the Uí Néill" at his death—by northerner Suibne Menn.

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