Complex sentence: In contrast the more commonly advertised sept O'Mullan of Coleraine and Derry, identified historically as being descendants of the northern Ui Neill, are virtually obscure in terms of any actual Irish Annal entries, suggesting they are not directly related to these earlier Laigin groups.
Split into simpler sentences: In contrast the more commonly referred to sept of O'Mullan in Coleraine and Derry, identified historically as descendants of the northern Ui Neill, are virtually obscure in terms of any actual Irish Annal entries. This would suggest they are not directly related to these earlier Laigin groups.