How about:
AdeleAdelaDella Delaney Lady
LedaAdaDollyDolie (dough-lee)
Dovie
DodieDot Deedee
Lay
LaylaAyda
Adelaide and
Gregory make a good enough sibset, but
Adelaide is too Victorian and regal for simple, modern
Gregory. It's even worse if
Gregory is called
Greg, though
Addie and
Greg are a lot more similar.