Marguerite is a nice name - I prefer it miles more than Margaret, which I've never warmed up to. However, while Daisy or Pearl might have worked as nicknames in the 19th century, when a name's meaning seemed to be much more common knowledge, it would seriously be reaching today, imo.
Please rate my personal name lists:
www.behindthename.com/pnl/69381www.behindthename.com/pnl/69381/109399www.behindthename.com/pnl/69381/91835http://greens-end.myminicity.com