Belknap or Belnap is a surname of Norman origin from England that may come from the Anglo-Norman words "belle," meaning beautiful, and "knap," meaning the crest or summit of a small hill. Although today the "k" in Belknap is generally silent as in the words "knight" or "knee," it is evident from documents dating from the Middle English period that it was originally pronounced as a hard "k." The surname is believed to be somewhat unusual, not only due to its relative infrequency but also because all known Belknaps or Belnaps living today are thought to descend from one man, Abraham Belknap (formerly known as Beltoft), who migrated from Sawbridgeworth, Hertfordshire, England to Lynn, Massachusetts about 1635. The surname continued in England for several centuries through other branches of the family but eventually died out in its country of origin in the early 20th century. Today, a wide variety of locations and institutions are named Belknap or Belnap, all of which are believed to be connected in some manner to this early Puritan emigrant to America. Places named Belknap or Belnap include over 130 streets, approximately 20 towns, and 1 U.S. county. Natural features named Belknap range from a nunatak near the South Pole in Antarctica, to a Canadian cape near the North Pole, to a seamount beneath the Pacific Ocean between California and Hawaii, to a tiny rocky island in Indonesia in Southeast Asia.