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Baron Aton was a title in the Peerage of England created in 1371 for Sir William Aton, who died in 1389 leaving three daughters: Anastasia, Catherine, and Elizabeth.
References
Burke, John (1846). A General and Heraldic Dictionary of the Peerages of England, Ireland, and Scotland, extinct, dormant, and in abeyance. Henry Colburn. p. 18.