The Rosalyn fleet is a merchant company that consists of many trading ships and is the largest fleet of merchant ships in Deltora. The organisation was founded by the Del citizen Rosalyn, whow was the daughter of Trader Garth and the mother of Chieftain Peregrine. The Rosalyn fleet is a meritocratic matriarchy with one elected leader known as the Trader Rosalyn who must be female as penned in the original Rosalyn Trust Deed by Rosalyn herself.
At certain points throughout each of the Star of Deltora books, the Rosalyn fleet is written as "Rosalyn Fleet" with "fleet" being capitalised. However, the norm is lowercase "fleet".