CASD offers wes ðu hál, hál westu, and hál béo ðu. As in nuncle's examples, the accents agues are meant to represent macrons. Also ð and þ are pretty much interchangeable in OE depending on dialect, time and prevailing winds.

http://penguin.pearson.swarthmore.edu/~scrist1/scanned_books/png/oe_clarkhall/b0144.png