Definitions for nanna
grandma, grandmother, granny, grannie, gran, nan, nanna(noun)
the mother of your father or mother
(Norse mythology) wife of Balder
god of the Moon; counterpart of the Akkadian Sin
The god of the moon in Sumerian mythology.
Origin: Possibly derived from nana.
The Nuttall Encyclopedia
in the Norse mythology the wife of Balder, the sun-god; distinguished for her conjugal fidelity, threw herself on the funeral pyre of her husband, and descended to the shades along with him; when the pair were entreated to return, he sent his ring to Odin and she her thimble to Frigga.