Glamorgan teams competing in the CB40 and Friends Life t20 next season will be called the Welsh Dragons.
The Welsh county has been known as the Glamorgan Dragons in those one-day competitions but for the first time in their history will not use 'Glamorgan'.
New captain Mark Wallace said the rebranding would reflect Glamorgan's status as Wales' first-class county.
"Every player knows that, in Glamorgan, he represents not just his county but also the whole of Wales," said Wallace.
"We feel that honour and pride in everything we do. I am extremely proud to have been appointed the club's 2012 captain and am very excited at the prospect of leading the Welsh Dragons.
"We want all talented Welsh cricketers to aspire to play for Glamorgan and, in the likes of James Harris, Will Owen and Gareth Rees, we already have a number of talented home-grown players making an impact in the team."
The Welsh Dragons will compete in a tough CB40 Group B that includes Scotland, Durham, Hampshire, Somerset, Nottinghamshire and defending champions Surrey.