and the second group?
It is a name adopted by Royalists, which previously Roundheads used as a term of abuse.
Cavalier
Cavalier () was first used by Roundheads as a term of abuse for the wealthier Royalist supporters of King Charles I and his son Charles II of England during the English Civil War, the Interregnum, and the Restoration (1642 – ). 
what is the boat race 1993? It is the 139th Boat Race took place on 27 March 1993. where was it held? Between crews from the Universities of Oxford and Cambridge along the River Thames. where did the name of the river originate from? Middle English what sports are played here? Watersports name one such sport. Rowing what are the different types of systems of this sport? UNANSWERABLE which ancient country played this sport? Egypt of the universities that were mentioned, where is the first one located? Oxford, Oxfordshire, England did any war take place in the first place? English Civil War which parties fought the war? Parliamentarians ("Roundheads") and Royalists ("Cavaliers") who were the first group? Supporters of the Parliament of England
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Cavalier [SEP] Introduction
Cavalier () was first used by Roundheads as a term of abuse for the wealthier Royalist supporters of King Charles I and his son Charles II of England during the English Civil War, the Interregnum, and the Restoration (1642 – ). It was later adopted by the Royalists themselves. Although it referred originally to political and social attitudes and behaviour, of which clothing was a very small part, it has subsequently become strongly identified with the fashionable clothing of the court at the time. Prince Rupert, commander of much of Charles I's cavalry, is often considered to be an archetypal Cavalier.