Heinrich was popular among continental royalty, being the name of seven German kings, starting with the 10th-century Henry I the Fowler (the first of the Saxon kings), and four French kings. In France it was usually rendered Henri from the Latin form Henricus.
The Normans introduced the French form to England, and it was subsequently used by eight kings, ending with the infamous Henry VIII in the 16th century. During the later Middle Ages it was fairly popular, and was generally rendered as Harry or Herry in English pronunciation. Notable bearers include arctic naval explorer Henry Hudson (1570-1611), American-British novelist Henry James (1843-1916), American automobile manufacturer Henry Ford (1863-1947), and American actor Henry Fonda (1905-1982).
Initially Saint George was primarily revered by Eastern Christians, but returning crusaders brought stories of him to Western Europe and he became the patron of England, Portugal, Catalonia and Aragon. The name was rarely used in England until the German-born George I came to the British throne in the 18th century. Five subsequent British kings have borne the name.
Other famous bearers include two kings of Greece, the composer George Frideric Handel (1685-1759), the first president of the United States, George Washington (1732-1797), and the Pacific explorer George Vancouver (1757-1798). This was also the pen name of authors George Eliot (1819-1880) and George Orwell (1903-1950), real names Mary Anne Evans and Eric Arthur Blair respectively.
This name is also used by Christians in India, notably Saint Thomas Christians in the state of Kerala in the spelling ജോർജ്ജ് (Jōrjj).
This name was not particularly common in Western Europe during the Middle Ages. It became more popular in part due to the fame of Prince Eugene of Savoy (1663-1736), a French-born general who served the Austrian Empire. A notable bearer was the American playwright Eugene O'Neill (1888-1953).
As an English name it can also derive from the month of August, which was named for the Roman emperor Augustus.
Arthur is the name of the central character in Arthurian legend, a 6th-century king of the Britons who resisted Saxon invaders. He may or may not have been based on a real person. He first appears in Welsh poems and chronicles (perhaps briefly in the 7th-century poem Y Gododdin and more definitively and extensively in the 9th-century History of the Britons [1]). However, his character was not developed until the chronicles of the 12th-century Geoffrey of Monmouth [2]. His tales were later taken up and expanded by French and English writers.
The name came into general use in England in the Middle Ages due to the prevalence of Arthurian romances, and it enjoyed a surge of popularity in the 19th century. Famous bearers include German philosopher Arthur Schopenhauer (1788-1860), mystery author and Sherlock Holmes creator Arthur Conan Doyle (1859-1930), and science-fiction author Arthur C. Clarke (1917-2008).