What does Gilbert mean, or who was it?

The Gilbert (G) is a unit for quantifying magnetomotive force, named after William Gilbert, an English scientist and physician born in 1544 and considered by many to be the father of electricity and magnetism. An alternative measure of magnetomotive force is ampere-turns (At); the Gilbert (G) is a slightly smaller unit than ampere-turns. To convert from ampere-turns to Gilberts, multiply by 1.25664.