ŏho, interj., an exclamation of surprise or joy,
oho! aha! oho, amabo, quid illuc non properas? Plaut. Poen. 1, 2, 51; id. Ps. 4, 2, 32 (dub. in both passages; al. ohe).
·interj An exclamation of surprise, ·etc. ...
Webster's Dictionary of the English Language