Levi, lighter and more energetic than most biblical names, with its up vowel ending, combines Old Testament gravitas with the casual flair associated with Levi Strauss jeans.

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.

The related Lucas and Luke are both hugely popular boy names in the US and internationally, and now Luca has joined them on boys' popularity lists around the world.

Matthew was the third most popular boys' name in America throughout the 1980s and '90s, and is still one of the top boy names starting with M. The New Testament Matthew is the epitome of the fashionable classic—safe and sturdy, yet with a more engaging personality than John or William.

Walter was seen as a noble name in the Sir Walter Raleigh and Sir Walter Scott era, but it then spent decades in baby name limbo. Now quite a few independent-minded parents are looking at it as a renewable, slightly quirky, classic, stronger and more distinctive than James or John, second only to William among the handsome classic boy baby names starting with W.

Currently overshadowed by the bright and lively Leo, Leon feels a slightly more serious, more quietly confident than its short and trending counterpart.

Jonah, the name of the Old Testament prophet who was swallowed by the whale, only to emerge unharmed three days later, is increasingly appreciated by parents looking for a biblical name less common than Jacob or Joshua, yet not too obscure. Plus, Jonah comes with a ready-made nursery-decorating motif.

Hudson has risen quickly up the charts over the past 30 years, getting a lot of its style value from New York's Hudson River. That makes it a nature name and a place name that's also got the fashion gloss of New York City.

Dylan still feels poetic and romantic after years of popularity. It still ranks highly on the charts, among the top boy names starting with D, so if you choose it, be aware that yours may not be the only Dylan in his class.

Samuel has been so popular for so long that it's hard to believe it's still climbing, at its highest point since the 1890s.

Nicholas is derived from the Greek Nikolaos, a name that evolved from the components nikē, meaning "victory", and laos, "people." It shares origins with Nike, the name of the Greek goddess of victory. Nicholas is also a New Testament name that is well-used in literature, such as in Dickens's Nicholas Nickleby.

Joshua, a Top 10 name from 1983 until 2010, has dropped out of the Top 50 but manages to present a relaxed, attractive image, with a bit of the Old West mixed in with its biblical persona.

Aiden in all its spelling variations is the Anglicized version of the Irish Aodhán, which was originally a pet form of the Irish name Aodh (pronounced 'ee'), who was the old Celtic god of the sun and fire. St. Aidan was a famous seventh century Irish saint, noted for his kindness and generosity and for spreading Christianity.

Mason is an occupational surname that ranked among the Top 10 name for boys throughout the 2010s, after its choice as one of the first Kardashian baby names. It remained a Top 10 choice in the US until 2020 when it began trending downwards and a recent year saw it rank at #42, the lowest it's placed since 2005.

Nathan is an Old Testament name that's ranked among the Top 100 names for boys for 50 years, and could well stay there for another 50. Strong, solid, and attractive, It's a name familiar to every schoolchild through Nathan Hale, the Revolutionary War spy.

Christopher derived from the Greek Christophoros, which is composed of the elements Christos, referring to Christ, and phero, meaning "to bear."

Jackson is one of those names that's much more popular than you think, coming in near the top of our annual Playground Analysis, which ranks names by grouping all their spellings together. Last year, more than 13,000 baby boys were named Jackson -- along Jaxon, Jaxson, Jaxxon, Jaxen, Jaxyn, Jaxsen, and Jaxsyn -- which counted together makes it the Number 5 boys' name.

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.

In the Old Testament, Joel was one of King David's 'mighty men' and the name was taken up by the Puritans of the sixteenth century. In the mid 1960s, Joel entered the Top 100, and stayed there for about twenty years, as parents tried to jazz up and formalize old standby Joe by reviving this biblical name.

Landon is a popular surname name; it's been dropping slightly in recent years but has surpassed its once more popular rhyming cousin Brandon. For some it may bring back nostalgic memories of Little House on the Prairie 's understanding Pa, played by Michael Landon.