Riona \ri(o)-na\ as a girl's name is pronounced ree-OH-nah. It is of Irish and Gaelic origin, and the meaning of Riona is "queenly".
Riona has 5 variant forms: Rionach, Rionagh, Rionna, Rionnagh and Rionnah.
For more information, see also related names Rhiannon, Catherine and Regina.
Baby names that sound like Riona are Rina, Riana, Rhona and Rona.