a copse between Lavant and Goodwood (Sussex). Same as weald. wold, wald, walt, “a wood.” (Anglo-Saxon.) The final o is about equivalent to “the,” as haelo, the whole, i.e. health; maenego, the many - i.e, multitude, etc.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894