龚 is a moderately common Chinese surname, ranked around 100th by population (Hundred Family Surnames). Two famous bearers anchor the name in cultural memory: (1)
龚自珍 (1792-1841), late-Qing reformist scholar whose poem
《己亥杂诗》 contains the famous line
我劝天公重抖擞,
不拘一格降人才 ('I urge Heaven to rouse itself again, and send down talent in every form'). (2)
龚贤 (1618-1689), early-Qing landscape painter, one of the Eight Masters of Jinling.