The leader of a Morrigi planet is known as the "De Meter", Mother of the World. "Meter" in general is a respectful term, and small children will address their female parent as "Mete", "Mommy", but as an adult when addressing the woman who actually gave birth to you, you generally call her "Delphyne", "Womb".
When addressing any powerful land-holder, the proper term of respect is "Kthonia", "She Who Holds Rights to the Land". If you wish to be respectful to a Morrigi woman but you are not certain whether you are within territory that she owns, you could use the generic "Anaxa", "Regal Lady". A woman who is older than you are is "Semne", "Revered One". A priestess can be "Hagnia", "Holy One". If she has prophetic powers, she may be a "Pythia", "Oracle" or "Prophetess".
Women who excel in building and manufacturing are typically called "Technea", "Mistress of Work". In sciences there are many titles, but the most common is "Phosphora", "Light-bringer".
When addressing any woman who outranks her within the tribe, a Morrigi girl would address her as "Megale" ("Greater-than-I"). A tribal leader is usually "Potnea" ("Queen"), although this term is tricky, as it is also used of Goddess figures. In the court of law, a tribal leader is addressed as "Thesmia", "Law-giver".
Finally, a woman with a particularly powerful feminine Glamour is called Daimea, "Terrifying One".
Hope that helps!