Oh, shut up and help me remodel the Yew Geneolgia page!
Yū is Japanese for courage.
Yew is a type of tree that is considered sacred in Celtic myths.
Yew's name may also be a play on the word "You", in reference to the final boss's conversation at the end of Bravely Second.
"Geneologia" is a play on genealogia, which translates from Greek and Latin as the "knowledge of generations."