Classic and elegant but with boyish charm, Theodore has become hit name in recent years, vaulting into the US Top 10 in 2021 for the first time ever and into the Top 5 in 2024. A favorite in English speaking countries, it also ranks highly across the UK and Ireland, and in Canada, New Zealand, and Australia.

Thea is a diminutive of names ending in -thea, including Dorothea, Althea, and Anthea. It is also the Anglicized spelling of Theia, the Titan of sight, goddess of light, and mother of the moon. She was the consort of Hyperion, and mother of Helios, Selene, and Eos.

One of the coolest of names, thanks to legendary jazz pianist Thelonious Sphere Monk, who inherited this Latin-sounding German name from his father. It has been used very sparingly since the 1960's, with just a sprinkling of baby boys receiving the name each year, though it's one of the unique baby names we predict will get much less unique as more parents embrace its quirky charms.

See the popularity graph below for the name Theo? It's been heading straight uphill since 2010, when it hopped back onto the Top 1000 after a 60+ year absence.

Tessa is one of those golden names that's been popular but not TOO popular for several decades now. Tessa has ranked in the Top 500 in the US since 1981 but has risen only once above Number 200.

Though never as popular as the name of her Bewitched mother, Samantha, Tabitha has its own quirky, magical charm. The name of a charitable woman who was restored to life by Saint Peter in the Bible, it was a popular Puritan choice. Sarah Jessica Parker and Matthew Broderick chose it for one of their twin daughters, which gave it a slight boost. Nonetheless, Tabitha remains in decline.

Tristan -- known through medieval legend and Wagnerian opera -- has a slightly wistful, touching air. This, combined with the name's popular "an" ending, makes Tristan very appealing to parents seeking a more original alternative to Christian.

This hauntingly euphonious Choctaw name has re-entered the public domain, as memories of the outrageous actress Tallulah Bankhead have faded. For years, Tallulah was a name associated only with Bankhead, named for her paternal grandmother who was named after the Georgia town of Tallulah Falls.

A favorite in England and Wales where nicknames as given names are very much the norm, Tilly has the potential to catch on in the US, given its similarity to the popular Lily and Ellie and the rising stars Millie, Billie, Kallie, and Nellie.

Talia is derived from the Hebrew elements tal, meaning "dew," and yah, in reference to God. In the mythology of one ancient sect, Talia was one of ten angels who attended the sun on its daily course. The occasionally homophonous name Thalia has unrelated Greek origins.

Tucker has more spunk than most last-name-first-names, and also a positive, comforting ("Tuck me in, Mommy") feel.

A strong single-syllable surname with a joyful meaning, Tate is finding a place on more and more birth certificates.

Titus, once seen as a slightly forbidding Roman, New Testament, and Shakespearean name, was brought back to contemporary life in the USA by the TV series Titus 2000, increasing in popularity along with other revived ancient names like Linus and Silas.

Cosy and warm but with plenty of substance and strength, Tess is a literary diminutive that works perfectly well as a stand-alone name. Stylish in the Netherlands, it currently sits outside the Top 1000 in the US, where Tessa and Teresa are currently preferred.

Tatum is strong, distinctive, energetic, and recommended, especially if your last name is as congenial as O'Neal. The name is now used for both genders, with the balance running about two to one in favor of the girls.

Theodora is one of the most revival-worthy of the charmingly old-fashioned Victorian valentine names, softly evocative but still substantial, as is the reversed-syllable Dorothea.

Truett is one of the trendier names in the Tru- family (True, Truman etc), which was used for 92 boys in the US last year. Truett is deeply associated with the Baptist church in the Southern USA due to former leader George Truett. Truitt is another spelling, less commonly used. Some sources say that Truett, as a surname or a first name, is a habitational name -- a name given to people who lived in a certain place -- in this case, Trewhitt in England's Northumbria. The place name is drawn from the Old Norse tyri meaning "dry resinous wood" and the Old English whit, which means river bend. It's an appealing name, though say it too quickly and it can sound disturbingly like truant.

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 quirky British nickname-turned- real-name is most famously borne by English actress Tuppence Middleton, who was named for her mother Tina’s childhood nickname. There is also a British literary namesake in Agatha Christie’s fictional detective Tuppence Beresford, whose real name is Prudence.

As Meghan/Megan and Reagan/Regan show signs of wilting, along comes Teagan to take up the slack: definitely one to consider. The vast majority of American babies named Teagan are now girls. A variant spelling is Teaghan.