GarcíaSpanish From a medieval given name of unknown meaning, possibly related to the Basque word hartz meaning "bear". This is the most common surname in Spain.
GarciaPortuguese, Spanish Portuguese form of García. It is also an unaccented form of the Spanish name used commonly in America and the Philippines.
GieseGerman, Danish Derived from a short form of the given name Giselbert or other Old German names beginning with the element gisal meaning "pledge, hostage".
GiffardFrench, English Possibly from Old French gifart meaning "chubby" or possibly from the Germanic name Gebhard. Walter Giffard was one of the Norman companions of William the Conqueror.
HerschelGerman, Jewish Diminutive form of Hirsch 1 or Hirsch 2. A famous bearer was the British-German astronomer William Herschel (1738-1822), as well as his sister Caroline Herschel (1750-1848) and son John Herschel (1792-1871), also noted scientists.
HobbesEnglish Derived from the medieval given name Hob. A famous bearer of this name was British political philosopher Thomas Hobbes (1588-1679), the author of Leviathan.