Thórdarson Ólafr (died 1259)

Icelandic poet and scholar. Of his work, a few incomplete poems and an important grammatical treatise have survived. Some scholars have maintained that he was the author of Laxdaela Saga (see saga), and he appears to have contributed, directly or indirectly, to Knýtlinga Saga.

He was the nephew of the saga writer Snorri Sturluson and brother of another, Sturla Thórdarson.