I really dislike
Penny, though I love
Penelope (my fav. nn's for it are
Ellie,
Ella,
Nell,
Nellie &
Poppy). As for Pennie, this spelling doesn't bother me too much because I had a friend growing up named
Penelope Renee nn Pennie. :)
As for combos, I wouldn't use another word name if using the
Penny spelling.
Penny Violet is a bit like a flower sold for 1 cent. :b Also, I'm not big on nicknames-as-formal-names in general, so the same goes with Penny/Pennie. As for what else
Penny could be a nn for, all I can come up with is
Aspen (which I really dislike),
Penka, and
Peninnah.