Kaol ir-Iuruth was a Romulan officer from the 25th century. (Star Trek: Frontiers) Kaol was assigned as the chief medical officer aboard the USS Enterprise-H as part of the Frontiers Accords that stipulated that a Romulan delegation had to be stationed aboard the Enterprise. Given Kaol did not have a Starfleet commission he did not wear a Starfleet uniform during his assignment to the Enterprise-H. His Romulan rank was Centurion, which was roughly equivalent to a lieutenant commander.