If I don't like a nn, generally I delegate the name to middle name status. Its not that I hate these nns, I just don't like them a lot.
Alexander nn
Alex or
XanderAllen nn
AlAlice nn
AllieAntonia nn
ToniAugusta nn
GussieBeatrix nn
TrixieChristian nn
ChrisClara nn
ClareCyrus nn
Cy (though it could grow on me)
Daphne nn Daphy
Edmund nn
Ed (though I do like
Ned, I just think people gravitate toward
Ed)
Fiona nn
FifiJames nn
JimLysandra nn
SandraRobert nn
Bob (but I do like
Robin)
Susannah nn
Sue,
SusieWilliam nn
Bill