Rhiannonna as a Baby Name. Meaning and Origin of Rhiannonna

What is the meaning of the name Rhiannonna ?

The baby name Rhiannonna is a Female name , 4 syllables long and is pronounced ree-AN-on-uh (IPA: /riːˈæn.ɒn.ə/).

Rhiannonna is Welsh in Origin.

Rhiannonna is a modern elaboration of the Welsh name Rhiannon, most likely formed by reshaping the -on ending to -onna with a final -a. Rhiannon itself derives from the Celtic theonym Rigantona, interpreted as “great queen” or “divine queen.” Through the Mabinogion tales, Rhiannon became a poetic emblem of sovereignty, horses, and endurance, and that meaning and aura are carried by Rhiannonna.

As a contemporary Anglophone coinage, Rhiannonna is rare in records but aligns with late-20th-century revivals of Welsh names. Usage of the root name surged after Fleetwood Mac’s 1975 song “Rhiannon,” and later variant spellings spread alongside the fame of the singer Rihanna - though that spelling often traces to Arabic Rayhana “sweet basil.” Related forms include Rhiannon, Rheannon, Rhianna, Rhiannan, Rhianon, and Riannon; short forms Rhi, Ria, and Nonnie are common.

⚙ Rhiannonna is absent from every birth registry and name dataset we follow. Most often that means a rare name, a regional or heritage one, or a recent coinage. Either way, it's a name very few children share.