A solid classic with plenty of history, Thomas strikes the balance between strength and gentleness. A favorite in the UK, a staple in France, and Australia, and never absent from the US Top 100, Thomas feels like a safe bet and a name that fits into any era.

Tamsin is an offbeat name occasionally heard in Britain and just waiting to be discovered here. U.K. actress Tamsin Greig is a star of the show Episodes, Tamsin Olivier is the daughter of Joan Plowright and Sir Laurence Olivier..

A surprising number of parents choose to put the nickname Tommy on their son's birth certificate rather than the more traditional Thomas. Perhaps even more surprising is thE fact that Tommy has never been off the United States popularity charts. More recently, however, the name has been trending downward.

This Scottish form of Thomas has a lot of charm, evoking images of men in plaid kilts playing the bagpipes. As for the 'ish' ending, it could either be seen as cozy and hamish, or a little wishy-washyish.

The most common form of Thomas in various European languages, although some Anglophone parents also use this as a phonetic spelling of the classic name. Tomas is usually pronounced with an emphasis on the second syllable -- toe-MAHS -- though you might not succeed in getting other people to go along with that in the US, where your exotically named Tomas may quickly devolve into just plain Tom.

Pre-Thomasina female form of Thomas, now seen as more literary and upscale British. In Thomas Hardy's novel The Return of the Native, a leading character is Thomasin Yeobright.

Just like Sam and Ben, Tom could be revived as a simple, well liked name on its own. Tom, just Tom, is one of the Top 100 Boy Names in France

Made famous in fifties movies as a wholesome backwoods gal, Tammy was a Top 10 choice from the mid-60s to early-70s, but is now given to fewer than 100 babies per year in the US.

Alternative Cornish spelling of Tamsin, which derives from Thomasin or Thomasina.

Sweet and cuddly, but with a hint of edginess, Tommie is a unisex nickname that fits right in with the likes of Scottie, Stevie, and Frankie. Ultimately from the Aramaic Teʾoma, meaning "twin", it could be used as a pet name for Thomasin, Thomasine, Tamsin, Thomasina, and Tomine.

Tomos is the standard Welsh version of Thomas, both in the Bible and secular texts like Thomas the Tank Engine. It is an enduring classic in the Welsh charts, with diminutives including Twm and Tomi.

Cute boyish nickname for Thomasina, Thomasin or Tamsin.

This Westernized form of the name of an ancient Mongol warrior, remembered primarily today through the works of Christopher Marlowe and Edgar Allan Poe, runs the risk of sounding pompous and pretentious.

Nearly every name takes on a more sensual, worldly quality in its Italian version.

Tomás is one of the most popular names in Portugal, also used in Spanish-speaking countries and recently gaining popularity in Ireland, where it's the traditional spelling of Thomas.

Though rarely used now that many parents would rather appropriate men's names than sweeten them with feminine endings, Thomasina does have some vintage appeal.

Toma is one of the handful of names that has different versions for boys and girls. For boys, it's the Romanian and Croatian short form of Thomas.

Tevis is a masculine name with Scottish and Hebrew origins. Derived either from the Scottish surname Tevis, a variant of Davis (meaning 'beloved'), or potentially from a Hebrew root meaning 'twin,' the name carries a distinctive sound with rich cultural connections. In American usage, Tevis gained limited recognition during the mid-20th century but has always remained uncommon, giving it a distinctive quality. The name received occasional boosts in recognition through literary connections, most notably author Walter Tevis, author of 'The Queen's Gambit' and 'The Hustler.' With its short, strong sound and uncommon status, Tevis appeals to parents seeking a masculine name that sounds established yet rarely encountered.

Tam Lin is the hero -- or maybe antihero -- of an old Scottish legend and ballad. The character Tam Lin was imprisoned by the Queen of the Fairies, called Titania or Mab.

Popularized in Scotland by Tam O'Shanter, the hero of one of Robert Burns' most famous poems, it's associated in the U.S. with the plaid cap he gave his name to. But this could make a creative honor name or middle name after an ancestral Thomas.