From Old French Jo(h)anne, and so a doublet of Joan. This too was revived as a given name in its own right in the first half of the 20th century. It has to some extent been influenced by the independently formed combination Jo Anne.
English: 1. from an Old English personal name, either Rǣdweald or Rǣdwulf. The first element in each is rǣd ‘counsel’, ‘advice’; the final elements are weald ‘rule’ and wulf ‘wolf’. 2. topographic name, from Old English (ge)ryd(d) ‘cleared’ + weald ‘woodland’, ‘high woodland subsequently cleared’.