/usr/share/poppler/nameToUnicode
NameSizeModeActions
Bulgarian6300644editdlrm
Greek1250644editdlrm
Thai30740644editdlrm
Edit: /usr/share/poppler/nameToUnicode/Greek (125B)
0396 Dzeta 039e Ksi 039f Omikron 03a7 Khi 03b2 betatwo 03b6 dzeta 03be ksi 03bf omikron 03c3 sigmafinal 03c6 phitwo 03c7 khi