Fimmbræðra saga ('the saga of the five brothers') is an Icelandic romance-saga by the priest Jón Oddsson Hjaltalín (1749-1835). It has been characterised as Jón's most ambitious work, and 'in many ways the most interesting of the sagas which Jón authored, first and foremost because he was more successful here than in any other saga in combining influences from a great many different sources, local and foreign, ancient and new'.