For some years there was a campaign by the Princess Gwenllian Society to have the name of this peak changed from Y Garnedd Uchaf to Carnedd Gwenllian. Gwenllian of Wales (1282–1337) was the only daughter of Llywelyn ap Gruffudd.
For a period of time, there was an effort by the Princess Gwenllian Society to rename this peak from Y Garnedd Uchaf to Carnedd Gwenllian. This is in reference to Gwenllian of Wales (1282–1337), daughter of Llywelyn ap Gruffudd.