A dumb ıdea
If Yy = i graeca (> i-grec, igrek, etc), since the letter is used to represent an /i/-like sound in Greek, then Iı = u turca (> u-turc, uturk, etc), since it represents an /u/-like sound in Turkish
If Yy = i graeca (> i-grec, igrek, etc), since the letter is used to represent an /i/-like sound in Greek, then Iı = u turca (> u-turc, uturk, etc), since it represents an /u/-like sound in Turkish