I can find no reference to any saints names Alisa of Alysa.
Alisa Fredericks's birth name is Alisa Fredericks.
Alisa Feodoridi's birth name is Alisa Konstantinovna Feodoridi.
Alisa Freyndlikh's birth name is Alisa Brunovna Freyndlikh.
Alisa Camplin's birth name is Alisa Peta Camplin.
Alisa Reyes's birth name is Alisa Adriana Reyes.
Alisa Grebenshchikova's birth name is Alisa Borisovna Grebenshchikova.
Alisa Zykina's birth name is Zykina, Alisa Igorevna.
Alisa Robinson's birth name is Lisa Kay Robinson.
Alisa West's birth name is Megan Alyssa Maes.
Lis
Yes!
Alisa is a version of the name Alice which is from the Old French name Alis (a short form of Adelais) itself a short form of the Germanic name Adalheidis (or Adelaide).