Zissel is the nickname for Zusha/Zisha. Girls are usually called Zissy.
A woman was called Elchanit after her grandfather Elchanan. At age 45, she went to see Rebbetzin Kanievsky who told her that her husband is opposed to certain names (Shira is one of them). She also said that her husband is opposed to giving boys names to girls and vice versa. The woman’s husband went to consult with Rav Kanievsky who told him to change his wife’s name. Today she is called Chana.