Love Felix Josiah,
Isaac is great too. Felidx and
Isaac make great twin names cuase they both have such nice meanings.
James feels increadibly filler to me, so unless it has special meaning I'd vote for something else.
Theodora is nms, I like Theo/Theodore on a byo too much I think, but
Catherine is lovely.
Love Alice and
Charlotte is nice.
Alice Keturah is such a great combo.