Well I would like to say neither, but if I have to choose,
Wilma. It makes me think Flintstones, but not as strongly as
Velma makes me think Scooby Doo.
Wilma is also close to some of my old family names. My dad’s family came from Germany and had lots of
Wilhelm which Americanized through generations to using
William. I would probably use
Willa as a nickname and go with something short and classic, a filler, middle like
Rose or
Grace.