When spelled "Susana," it is Portuguese or Spanish.
"Susana" signifies someone who is pure and good, possibly because Susana is figured in the Bible twice. In the New Testament she is a follower of Jesus. In the Old Testament apocrypha, she is an innocent young woman falsely accused of adultery after she refuses to give in to the advances of some elders. The men are executed and she is exonerated after God sends Daniel to defend her at trial.
She's a real Susana, you can count on her.