The Fornaldarsagas have great value for legend research, since they contain motifs and complexes of motifs from many types of legend of which there is otherwise no documentation in Scandinavia prior to the mid-19th century.
Fornaldarsagaer har stor værdig for forskning i legender, da de indeholder motiver og komplekse motiver fra mange typer legender, som der ellers ikke er dokumentation for i Skandinavien før midten af 1800-tallet.