The Dauphin known by this first name appears in "Henry VI, Part I"
The 
Dauphin Charles is crowned king of Rheims; .... God's mother deigned to appear 
to me [DOC] [TLE] Henry VI Part I - Cummings Study Guides [PAR] Henry VI Part I was written between 1590 and 1592, when Shakespeare was still 
in his .... Parliament names him acting Lord Protector to oversee government 
affairs.