A strong, straightforward Irish unisex surname, with a merry glint in its eye, Reagan has been leaping up the popularity lists, to become one of the top girl names starting with R. Some will inevitably link it to President Ronald, but spell it Regan and it's a Shakespearean name: a daughter of King Lear.

Edgar is an Old English name historically associated with the tenth century English king known as Edgar the Peaceful. There was also a King Edgar of Scotland.

An old-fashioned nickname in the Bud/Buzz/Biff mold; this one's kind of belligerent. Michelle Hicks and Jonny Lee Miller moved outside the box when they used it for their son--given the safer middle name of Timothy.

A straightforward, down-to-earth nickname many Walters, from Whitman to Disney, have chosen to go by.

Though Shelby was trendier ten years ago, it's still a widely used choice.

So uncool it's cool! Bertie makes for a boyish nickname for Alberta, Roberta, Bertille, Albertine... or just use it on its own, à la Billie or Frankie. Old school unisex nickname names are back in and Bertie has an undeniable vintage charm; particularly given soundalike Birdie rising in the ranks.