According to my Norwegian mother Lill-Aase Thingvold, b. 1942, Kristiansund N., Møre og Romsdal, Norge, Aase means "Goddess" in Old Norse. Aase is the old-fashioned Norwegian spelling, it is now usually spelled Åse. In fact, most old Norwegian names that used to be spelled with a double "aa" (e.g., Haakon) are now spelled with the letter å taking the place of the double "aa" (e.g., Haakon would now be spelled Håkon, etc.)