Meaning

noun a unit of magnetomotive force equal to 0.7958 ampere-turns

noun a librettist who was a collaborator with Sir Arthur Sullivan in a famous series of comic operettas (1836-1911)

noun English court physician noted for his studies of terrestrial magnetism (1540-1603)

originFrom Old French Gislebert, from Proto-Germanic *Gīslaberhtaz, from *gīslaz (“pledge”) + *berhtaz (“bright, famous”).

Etymology from Wiktionary, CC BY-SA 3.0