Gwenllian (?) verch Llewelyn - Parents of Gwenllian (?) verch Llewelyn

Good morning,

I was hoping someone could help with who the parents are of Gwenllian (?) verch Llewelyn. Her birth date is 1207 which causes much confusion if her parents are actually of Llewelyn ab Owain and Lady Eleanor de Bar who were born around 70 to 80 years after her birth.

Also, her husband, Rhys ap Rhydderch, indicates a birth date of circa 1200.

Not sure if she got merged into an incorrect profile but something does not make sense.
Best regards,
John Love