The Collaborative International Dictionary
Welaway
Welaway \Wel"a*way\, interj. [OE. welaway, walaway, weilawey; wei wo! (Icel. vei) + la lo! (AS. l[=a]) + wei wo!; cf. AS. w[=a] l[=a] w[=a]. See Woe.] Alas! [Obs.]
Then welaway, for she undone was clean.
--Wyatt.
Wiktionary
welaway
interj. (obsolete form of wellaway English)