Diocletian's original given name was ÎÎ¹Î¿ÎºÎ»Î·Ï (Diocles), which is a very common Greek first name. The meaning of the name is uncertain, but Î´Î¹Î¿Î¹ÎºÎµÏ means to rule and the first part of the word (DIO) has the sense of a god or a lord. Your guess is not completely off base, however, because words for two are similar.
Pant sets are another fashionable approach to take when deciding how to wear pants for your mother of the bride/groom look. They come as a set and are often made of chiffon and silk material. The pants are generally flowy, which creates a more dressed up look.
Compare notes with the groom's mom -- you'll both feel more comfortable if your elegance is in sync. If you follow tradition, the mother of the bride should be allowed the first opportunity to choose a dress so you don't end up with the same one.