AB, In English names, is an abbreviation of Abbey or Abbot.
AB, a prefix to words of Latin origin, and a Latin preposition, as in abscond, written in ancient Latin af. It denotes from, separating or departure.
AB, The Hebrew name of Father.
AB, The eleventh month of the Jewish civil year, and fifth of the ecclesiastical year, answering to a part of July, and a part of August.