I’m so sorry for your loss – my prayers go out to you and your family 
Here are a few gender neutral options that have biblical roots and/or a beautiful meaning:
[name_f][/name_f][name_m]Jude[/name_m][name_f][/name_f] – meaning “praised,” the patron saint of lost things
[name_f][/name_f][name_f]Shiloh[/name_f][name_f][/name_f] – meaning “peace, tranquility”
[name_f][/name_f][name_f]Eden[/name_f][name_f][/name_f] – meaning “paradise”
[name_f][/name_f][name_m]Noah[/name_m] / [name_f]Noa[/name_f][name_f][/name_f] – meaning “rest, comfort, peace”