Definition of "gesith"

Beowulf the son of the noble Ecgtheow became the gesith of King Hygelac, and, when he rose to be a chieftain, had lands, treasures, and gesiths of his own [...]

1903, William Stubbs, The constitutional history of England in its origin and development

The gesith took him and had his wounds attended to.

1999, Saint Bede (the Venerable), Judith McClure, Roger Collins, The Ecclesiastical History of the English People

"Now comes before you Luisan the Fat of Littlewood, who stands accused of murder," announced Heldric, gesith of Lord Ossaric's liegemen and most experienced in the ways of the court.

2010, Liane Merciel, The River Kings' Road‎ (Fiction), Simon and Schuster, page 73