Gaidoald
Our main source for Gaidoald's life is Paul the Deacon's "Historia Langobardorum" , which in turn depends on the lost "Historiola" of Secundus of Non , Gaidoald's contemporary . 
<triplet> Paul the Deacon <subj> Historia Langobardorum <obj> notable work <triplet> Historia Langobardorum <subj> Paul the Deacon <obj> author