Rhododendron catawbiense, with common names Catawba rosebay, Catawba rhododendron, mountain rosebay, purple ivy, purple laurel, purple rhododendron, red laurel, rosebay, rosebay laurel, is a species of "Rhododendron" native to the eastern United States, growing mainly in the southern Appalachian Mountains from Virginia south to northern Alabama.

Can we draw the following conclusion?
purple laurel is sometimes also called red laurel 
Yes