The Collaborative International Dictionary of English v.0.48:
Dolly Varden \Dol"ly Var"den\
1. A character in Dickens's novel "Barnaby Rudge," a
beautiful, lively, and coquettish girl who wore a
cherry-colored mantle and cherry-colored ribbons.
2. A style of light, bright-figured dress goods for women;
also, a style of dress.
Dolly Varden trout (Zool.), a trout of northwest America;
-- called also bull trout, malma, and red-spotted
trout. See Malma.