At the moment, the display name is set to "Leo VI 'The Wise', Byzantine Emperor", his surname is set to "Λέων" (Leo in Greek characters only), and the rest of his name fields are left blank.
I find the resulting display to be confusing in tree merge view - a Greek name that I can only read with difficulty shows up instead of the Latin-character name I've been looking at a moment ago. Should we make the name "Λέων / Leo" instead, and add "Byzantine Emperor" into his title field, to give more hints that the user is not looking at a different profile?