Whatever floats your boat, but you don't seem to be one hundred percent certain. I would suggest not using any name your enthusiasm for which is influenced by the waxing and waning of the moon, as that is in constant flux, you know. You can't keep changing a birth certificate every two weeks. You didn't ask for an opinion, but I don't need to be asked.
Jethro is horribly hillbilly--I know it's pedestrian of me to not be able to shed that image, but there's no changing it-- and
Matilda is heavy and ugly. But then, with just a few exceptions, I don't see colors when I hear names---I know there's a term for that, but I can't remember it at the moment.