AMBERY

This form and its German variant Augusten are moving up fast as the preferred long forms of the trendy Gus.

Augustin

Attractive translation of Beatrice, popular with Hispanic parents. Beatriz is currently a Top 10 girl name in Portugal.
 
The original Latin form of the name, Beatrix, was in early sources spelled Viatrix, meaning "voyager". They may have been two commonly-confused names, or the spelling could have been deliberately changed to resemble the Latin word beatus, "blessed". Either way, there is room for both meanings in this name's rich history.

Beatriz

Very popular in Wales, this perfectly nice name's only problem is its similarity to the dated Beth Ann. 

Bethan

Brenn

Cherry-ann

Elisyn

ELIZABETHAN

Most parents would prefer London for their daughters. 

England

The longer Isabella stays in the Top 10—and it's been there for more than a decade—the more we hear the nickname Izzy (especially if we watch Grey's Anatomy). it's just a matter of time before it stands on its own, as it has as a first name for the daughter of Eddie Murphy and Paige Butcher.

Izzy

Larien

Could be confused with the much less captivating Leanne. 

Lian

LULLY

Machell

Your zany neighbor, the one who's a potter and has five cats. 

Malva

NOLE

Serzh

The lovely Sybella is being nudged into the spotlight by two influences: the original Sybil (the most popular spelling) or Sibyl, name of the beauteous youngest sister of television's period megahit Downton Abbey, and Top Ten name Isabella.  

Biggest downside: There are an awful lot of girls with names that are variations of Bella around these days.  But Sybella at least makes a distinctive member of the genre.

Sybella

SYLWIA

Virtue

This pet form of such names as Winifred and Edwina and Gwendolyn has loads of vintage charm, a la Millie and Maisie, with a decidedly winning vibe. And it just got celebrity cred as the baby daughter of Jimmy Fallon.
 Winnie had been used regularly on its own in the U.S. through the early 1950's and has a number of varied namesakes. There's the Pooh, of course, and also Winnie Mandela, former wife of South African President Nelson; Winnie Cooper, the charming girlfriend of the young hero on The Wonder Years--whose given name was Gwendolyn; Winifred "Winnie" Foster, a main character in the childhood classic Tuck Everlasting; and it was also a nickname for Winston Churchill.

Winnie

mytimehascome2's list "Unnamed List9" of 21 great name ideas: AMBERY - Winnie!