This is a complex name to understand let alone define. The reason this is so complicated is because the many theory's experts have come to. One of the theory's states that this name is only used for people with extreme power and or abilities like a goddess or pharaoh. The extent of this name cannot put into perspective for the simple fact that a word has not been created that fully describes her. Philosophers say Cleopatra was going to be named Jillian but once the power of the name alone was considered they decided she could not fulfill such large shoes.
We have been graced with few words/phases that describe Jillian.
Jillian is an incredible friend, who's loyal and wont stab you in the back. She has an amazing sense of humor and loves to laugh and have a good time. She may come up with some ideas that simple minded humans cannot see the point or concept, these ideas takes someone else who's name shares the same magnitude as hers. Because of this some may consider her and some of her ideas crazy, stop yourself from thinking this because this type of crazy is far past your imagination and should be thought of as a good thing. Shes a beautiful woman to say the least. Hot/sexy would also be another good term to address her appearance. Her intelligence is far beyond anything a simple mind can understand so dont even try to venture down that road. Simply put Jillian is awesome for lack of a better word.
Jillian. there is nothing that accurately describes her but this is as close as we can get.