The tale Aided Chrimthainn maic Fidaig ('The Killing of Crimthann mac Fidaig') tells how Mongfind kills her brother, king Crimthann of Munster, so that one of her sons might become king.
O conto Aided Chrimthainn maic Fidaig ('O asasinato de Crimthann mac Fidaig') conta como Mongfind mata ó seu irmán, o rei Crimthann de Munster, para que un dos seus fillos se converta en rei.