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Abbot Apodemus.
Abbot Glisam was the first abbot dormouse of Redwall.
The word abbot does not have an opposite. The word abbess, if that is what you have in mind, is not an antonym of abbot.
The address of the Abbot Historical Society is: Po Box 105, Abbot, ME 04406-0105
A female Abbot is an Abbess.