The Collaborative International Dictionary of English v.0.48:
Quotha \Quoth"a\ (kw[=o]th"[.a]), interj. [For quoth 'a, said he, 'a being corrupted from he.] Indeed; forsooth. [1913 Webster] To affront the blessed hillside drabs and thieves With mended morals, quotha, -- fine new lives ! --Mrs. Browning. [1913 Webster]