High, noble, or exalted
Briannon is a modern variation of the Welsh name Rhiannon, likely influenced by the popular name Brianna. It combines the Celtic root 'bre' (meaning hill or high) with the suffix associated with the mythological Welsh queen of fertility and the moon.
Fewer than 5 girls were named Briannon in 2025.
US births per 5-year period, 1990–present (SSA data).
