Little is known about the trobairitz Castelloza. She seems to have been active during the early 13th century. According to her vida she came from Auvergne and married a man named Truc Mairona. She probably also knew the troubadour Peirol.
Three songs from the chansonniers are attributed to her and one other can also safely be claimed for her. None have music. The theme of her songs is betrayed love.