Her name was Rhea.
It's Mia Rinaldi in Vampire Academy.
There are two 'Nathan' in the Vampire Academy series, Nathan Ivashkov(Adrian's father) and Nathan(the strigoi that turned Dimitri).
Rinaldi.
Practically there isn't a seventh book to Vampire Academy. But think you meant the sixth book which is Last Sacrifice.
Edwards moms name is Esme and she too is a vampire.
Belikov
Buffy's mothers name was joyce
Her brother is kaname, the pureblood vampire of cross academy
Queen tatiana's last name happens to be Ivashkov. just like her great-nephew adrian. (the one who has a crush on rose.)
Janine(Ja-neen) Hathaway
Here full name is Rose Hathaway. Hathaway is her last name.
The name of the next vampire academy book is Final Sacrifice and its coming out on December 7th. Hoped I helped!