Ecglaf is a minor character mentioned in the Old English epic poem Beowulf. He is primarily known as the father of Unferth, one of King Hrothgar's retainers at the Danish court of Heorot.
While Unferth plays a more significant role in the narrative, most notably through his challenge to Beowulf regarding the swimming match with Breca, Ecglaf himself is given no direct action or dialogue within the poem. His name serves primarily as a patronymic identifier for Unferth ("son of Ecglaf"), establishing Unferth's lineage and, by extension, his standing within the Danish court. The poem does not provide further details about Ecglaf's life, deeds, or position beyond his familial connection to Unferth.