Yrða

austan

atviksorð
adv. [A. S. eastan; Hel. ôstan], from the east, Eg. 183, Eb. 4: of the direction of the wind (cp. vestan, sunnan, norðan), used with a preceding prep. á, á vestan, austan …, blowing from west, east …, Bs. ii. 48.
β. fyrir a. used as a prep. with acc. east of; fyrir a. mitt haf, Grág. ch. 85, p. 142 new Ed., Nj. 36, 81, Eg. 100, Landn. 228.
γ. with gen. in phrases like austan lands, a. fjarðar, cp. norðan, sunnan, vestan, Hkr. iii. 201.