Grendel’s mother is famously silent in Beowulf, uttering not a single word of dialogue during her time in the narrative, and the silence surrounding her begins even before her entrance and extends beyond her death. Working from this collection of indirect evidence, I argue that the poem presents Grendel’s mother—and her silence—as occupying a space between and combining men and women, a trans space that refuses categorization and reveals the fallacy of binary divisions of sex and gender.