Names...

Eugenia and Eugene

 (Ginnie and Gene)

"Well-born" in Greek

Thomas Ward

Based on “doubting Thomas”

for his questioning nature.

A ward is a protector.

Prudence

(Ironic) Wise, cautious

Diggory

"Lost one" in French

Felicity

Happiness

In case you've wondered why I chose the character names in these books, here you go!