These short notes discuss the specific names of the disguise and mask rituals of the Greek folk calendar cycle, their probable etymology, and theories elaborated thus far on their origin. In particular, they discuss the dodola/perperuna-ritual, the rite of kalojan/scalojan, both proclaiming the onset of rain, the rituals linked to rosalia (rosaliile, rusalki, neraides), the quête procession on Lazarus day, carnival masks and midwinter disguise rituals such as the rugatsia and kalikantzaroi.