I-IX-MMIX
XII/VI/MMIX
II-IX-MMIX
IX-XIX-MMIX
Iii ix mmix
In today's notation: December-VI-MMIX or as XII-VI-MMIX
I-IX-MMIX
IX-I-MMIX
X/XII/MMIX
XII/VI/MMIX
In today's modern conversion they are: September-XX-MMIX or IX-XX-MMIX
ii-ix-mmix
IX/IV/MMIX
IX-II-MMIX
V-IX-MMIX
II-IX-MMIX
IX-XIX-MMIX