Gwenllian is a name that is more commonly used in Wales and among individuals of Welsh heritage. It carries a sense of Welsh identity and cultural significance.

Gwenllian has a regal and elegant quality, reflecting its association with noble figures in Welsh history and mythology. The name Gwenllian is often associated with Gwenllian ferch Gruffydd, a prominent figure in Welsh history who lived in the 12th century. She was the daughter of Prince Gruffydd ap Cynan of Gwynedd and became known for her courage and leadership during the Welsh resistance against Norman invasions. Her legacy as a warrior princess and her fight for Welsh independence make her a notable namesake for Gwenllian.

Gwenllian Glyn, a Welsh-language poet and playwright. Gwenllian Glyn has been recognized for her contributions to contemporary Welsh literature, receiving awards and critical acclaim for her works. Her talent and creativity in the field of literature showcase the name Gwenllian's connection to artistic expression and cultural preservation.