I lived in Australia for a year and there I met about 5 girls named tee-AHN. I guessed it was spelled Tiarne, but I know one of them definitely spells it Tiahn. At the time I thought it was really unusual but my Australian friend seemed to find it pretty normal so I wonder whether it's popular in Australia and where it comes from exactly. It doesn't show up in popularity stats and I'm confused I met so many.
Also does anyone know what Elissa means? And is it certain that it's from mythology? Thanks.