The Collaborative International Dictionary of English v.0.48:

Ey \Ey\, n.[AS.[imac]g. Cf.Eyot.]
   An island. [Obs.]
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The Collaborative International Dictionary of English v.0.48:

Ey \Ey\, n.; pl. Eyren.
   See Egg. [Obs.] --Chaucer.
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The Collaborative International Dictionary of English v.0.48:

Ey \Ey\,
   An interj. of wonder or inquiry. [Obs.] -- Chaucer.
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The Collaborative International Dictionary of English v.0.48:

Eyot \Ey"ot\ ([imac]"[o^]t or [=a]t), n. [Ey (AS. [imac]g or
   Icel. ey) + F. dim. termination -ot; cf. AS. [imac]geo[eth].
   See Island, and cf. Ait.]
   A little island in a river or lake. See Ait. [Written also
   ait, ayt, ey, eyet, and eyght.] --Blackstone.
   [1913 Webster]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

EY. A watery place; water. Co. Litt 6.