The name "Rhiannen" is a variation of the Welsh name "Rhiannon". The IPA phonetic transcription for Rhiannon is /riˈænən/, while Rhiannen is pronounced as /riˈænən/ with an additional "e" sound at the end. The spelling of this name could be influenced by personal preference or regional dialect. However, it's important to note that when using a unique or uncommon spelling of a name, it may lead to difficulty in pronunciation and spelling for others.
The name "Rhiannen" is of Welsh origin. It is derived from the Welsh name "Rhiannon", which consists of two elements: "rhi" meaning "great" or "queen", and "annon" meaning "fair" or "beautiful". The name Rhiannon has mythological origins and is associated with the Welsh goddess of fertility, horses, and the moon. "Rhiannen" is a variant spelling of "Rhiannon" and was likely developed as an alternative pronunciation or spelling of the name.