UNNA.  Old Norse name meaning "love" and "woman."

... The word unna, though derived from the verb an unna, to love, has come to mean only a woman, and as such is frequently used as a termination, as well as now and then standing alone as a female name, Unna, of whom there are three in the Landnama-bok, and several in the Saga of Burnt Njal.
... Unna is said to come from the same root as undu, the Latin wave; but the word also means love, and thence a woman, and there is a curious similitude in it to Ainè, the granddaughter of Lyr, in Irish legend...
    ... As the daughter of Davy Jones, the name would be from the Latin, for she was the wave rising as in human shape. (History of Christian Names, Yonge, 1884).