Abby

Abby could be a nickname for Abigaia, Abilene, Abital, Abia, Abijah, Amabel, Amabilia, Anabel, Anabela, Anabella, Anabelle, Annabel, Annabella, Annabelle, Annabeth, Arabella, Babette, Barbara, Bathsheba, Christabel, Christabella, Christabelle, Elisabeth, Elizabeth, Elsabeth, Fabia, Fabiana, Fabiola, Fabricia, Gabriella, Gabrielle, Isabeau, Isabel, Isabela, Isabell, Isabella, Isabelle, Izabel, Izabella, Izabelle, Mabel, Mabella, Mabelle, Mariabella, Mehetabel, Mehitabel, Mirabella, Mirabelle, Rosabel, Rosabella, Rosabelle, Sabina, Sabrina, Sabryna, Tabatha, Tabitha and Ysabel.

Abby is also used as a masculine name in English, as a diminutive of Abraham, Abram, Albert, Abel, etc. However, it's more common for females. So, I think that the "Gender" of this name should be updated from "Feminine" to "Feminine & Masculine".

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Source: https://en.m.wikipedia.org/wiki/Abby

Also used as a short form of Abolone, Abena, and Abene, along with Abigail.