Aastfräislound (Saterland Frisian) comes from Saterland Frisian Aaste, from Old Frisian āst, from Old Norse austr, from Proto-Germanic austrą, from Proto-Germanic austraz, from Proto-Indo-European *h₂éwsteros — in the direction of dawn, east.
Ancestry of “Aastfräislound”, step by step
Aastfräislound traces back through two separate lines of ancestry.