Queen or divine queen
Ryonna is likely a modern American elaboration of the Welsh name Rhiannon or the name Ryan. It is often interpreted as 'divine queen' or 'great queen' based on its Celtic roots, though it is frequently chosen for its melodic, contemporary sound.
Less common today
Ryonna isn't in the latest US Top 1000. It last peaked at #12,210 in 2008.
US births per 5-year period, 1990βpresent (SSA data).