Ó Síoghradha
Ó SÍOGHRADHA, Ó SÍOGHRAIDH—II—O Shrue, O Shirie, O Shyry; 'descendant of Síoghraidh' (the Norse Sigefrith); the same as Ó Siochradha, which see; formerly in use in the midlands and Tirconnell; now changed to Ó Saoraidhe or Ó Saothruidhe, which see.
Alphabetical Index to Irish Surnames