Meaning uncertain, possibly a Latinized form of a Germanic
name derived from the elements hrod
"fame" and wunn
"joy, bliss". According to the 12th-century chronicler Geoffrey of Monmouth, this was the name of a daughter of the Saxon chief Hengist. Alternatively, Geoffrey may have based it on a Welsh name. It was popularized by Sir Walter Scott, who used it for a character in his novel 'Ivanhoe' (1819).