Ciarán and its variants (Kieran, Kieron, Kyran, Keiran, Kiaran, etc.) are also used for females, but they're more common for males. So, I think that the "Gender" of these names should be changed from "Masculine" to "Masculine & Feminine". Sources: https://en.m.wikipedia.org/wiki/Ciarán https://forebears.io/x/forenames/ciaran