As far as I know "Aye" is used in political circles to say that a vote is for somenthing (opposite of "nay" vote)or in poetry work as synomyn with "Yes or ever".    The latter is deemed archaic nowadays.

    Ah, a NAY voter is called a Nayer; a Aye one  is named an Aye (without adding R).

    In a nutshell  Aye-positive vote or voter.

                        Nay-negative vote

                        Nayer-Negative voter.

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  See you again, have a nice week.