Here is a link to show you how writers name their characters.
Alyssa Elle Steinacker goes by Alyssa Elle.
Alyssa Petersen goes by Lyssa.
Alyssa Soebandono goes by Icha.
Alyssa Stringfellow goes by Pebbles.
Alyssa Jones goes by Sis.
Alyssa Lakota goes by Lakota.
Alyssa Driscoll goes by Lyssdri.
Alyssa Hanner goes by Ally.
Alyssa Goodstein goes by Alis.
Alyssa Graham goes by Aly.
Alyssa Alexandria goes by Aly.
Alyssa Lawrence goes by AJ.