I just started reading Virtuous Prince. I am not even past 50 pages of honking big type and have found some things that contradict what I thought I already knew.
Starkey attributes the naming of Arthur to the Arthurian legend but Julia Fox clearly states that Arthur was named for a star prominent at his nativity – probably Arcturus. (Source: Anglo, British History, p. 32 and note 2.) She believes that the Arthurian Legend became attached to Arthur much later. Who do you think is right?