Borommaracha or Borom Racha (th|บรมราชา|link=no, pronounced as /th/; pi|Paramarājā|link=no; "Supreme King"), or the extended version Borommarachathirat or Borom Rachathirat (th|บรมราชาธิราช|link=no, pronounced as /th/; pi|Paramarājādhirāja|link=no; "Supreme King of High kings"), was a Thai royal title, and may refer to: