valskjalf (f.): A hap. leg., but Valaskjǫlf (or Válaskjálf), is the name of Óðinn’s hall (Grí 6/4). As a river-name, the cpd is probably formed from valr m. ‘the slain’ (val- may have a more general sense, ‘war-’, here) and skjálf f. ‘shelf’, hence lit. ‘slain/war-shelf’, or, according to AEW: skjalf, skjálf ‘peak’. Alternatively, the second element might be a nomen actionis from the strong verb skjálfa ‘tremble, shake’ (hence ‘slain-shiver’). Cf. also Hliðskjálf, the elevated place where Óðinn and Frigg sit when they look out over all worlds (see Grí prose, NK 56).