Viltautė is also used as a masculine name in Lithuanian, alongside Viltautas. However, Viltautė is more common for females. So, I think that the "Gender" of this name should be changed from "Feminine" to "Feminine & Masculine".Source: https://www.names.org/n/viltaute/about
Source: https://www.names.org/n/viltaute/about