Abbie

Abbie 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.

Abbie 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

In 2018, 7 is the most common age for an American (U.S.) Abbie* who is registered female with the Social Security Administration. It is the 1, 655th most common female first name for living U.S. citizens.

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*as a first name, not a nickname.

The name Abbie was given to 212 girls born in the US in 2015.