Rule of the Dukes
The interregnum is said to have lasted a decade according to Paul the Deacon , but all other sources—the "Fredegarii Chronicon" , the "Origo Gentis Langobardorum" , the "Chronicon Gothanum" , and the Copenhagen continuator of Prosper Tiro—accord it twelve . 
<triplet> Origo Gentis Langobardorum <subj> Paul the Deacon <obj> author