In the Later Edda (Skáldskaparmál), c. 25, we read—
“How is the sea to be called? Ymir’s blood, the visitor of the gods, the husband of Ran, the father of Ægir’s daughters, who have the following names:—
“Himinglœfa—the heaven glittering (implying the glittering of the sun and moon on the waves).
“Dùfa—the dove (symbolising the stillness of a quiet sea, heaving up and down gently).
“Blódughadda—the bloody-haired (so named from the sunset or blood giving colour to the waves).
“Hefring—the hurling, heaving—may mean the overdrifting, moving heavily along by a gale.
“Unn (Ud)—the loving or beloved one.
“Hrönn—the towering one.
“Bylgja—the billowing, swelling one.
“Bara—the one carrying, lashing against the rocks.