Liana Pevensie is the daughter of Kind Edmund Pevensie II and Queen Rose Pevensie. She is the half-brother of King Rodney Matthews.
Race
Liana's race is easy to figure out. Her father is 1/2 Telmarine 1/2 Human. Her mother is 100% Archenlander. So her race is 1/4 Telmarine 1/4 Human and 1/2 Archenlander.
Family
Grandparents
Caspian X - Grandfather
Susan Pevensie - Grandmother
Parents
Edmund Pevensie II - Father
Rose Pevensie - Mother
Siblings
Rodney Matthews - Half-brother
Aunts and Uncles
Peter Pevensie - Great-uncle
Edmund Pevensie II - Great-uncle
Lucy Pevensie - Great-aunt