Jude is a modern star, maintaining a steady level of popularity -- but not TOO much popularity, in the US at least. Thank Jude Law and the great Lennon-McCartney song "Hey Jude", double-handedly responsible for propelling Jude up the charts.

Jasper originated as a variation of the Latin Gaspar, which ultimately derived from the Persian word ganzabara, meaning "bringer of treasure." As a given name, Jasper’s etymology is unrelated to that of the gemstone, which comes from a Semitic word meaning "speckled stone." Jasper is the usual English form for one of the Three Wise Men who brought gifts to the infant Christ according to medieval tradition and appears in the Bible as a reference to the stone itself in Revelations 4:3.

Jack may have fallen from its Number 1 place in England, but in the US it's as popular as it was at its height in the 1920s and 1930s. A durable, cheery, everyman form of John, Jack ranks as one of the most popular boy names starting with J.

Cool and charming, with plenty of flair and sophistication, Julian manages to strike the balance between being a sensible classic and contemporary choice. Appealingly international, it is no wonder Julian is a rising star.

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.

Joseph is one of the most classic names in American nomenclature, popular with parents from many ethnic backgrounds and having dual-religious appeal.

Short, sharp, and cool, Jett is a contemporary choice that connotes both gemstones and jet engines. Rarely used before the 90s, John Travolta, and then George Lucas, helped to put the name on the map by choosing it for their sons.

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.

King David's father turned 1980s cowboy, Jesse is now down in popularity but still a Biblical classic, ranking in the US Top 1000 for its entire history. The name is associated with a wide variety of bearers, from outlaw Jesse James to Olympic athlete Jesse Owens to activist Jesse Jackson to current actors Jesse Tyler Ferguson and Jesse Eisenberg. The spelling Jesse is more usual as a boys' name while Jessie is more traditional for girls.

With its cool -X ending, Jax is an update on the classic nickname Jack, likely inspired by the rise of Jackson. It garnered attention in the US thanks to the game, Mortal Kombat II back in the '90s, and was pushed up the charts when it was used in the show Sons of Anarchy, in which Jackson "Jax" Teller is the central character.

The cool form of James in the 1970s and '80s for both sexes. Still a more stylish short form than Jimmy, though many parents will want to call James by his entire, not-very-long name.

Though this feels like a modern invention, Jay has been in use for centuries. Early Jays often were named in honor of founding father John Jay, whose surname derived from the jaybird. A popular mid-century choice, Jay was in the Top 100 from 1956 to 1970. In the last couple of decades he was replaced by such more elaborate forms as Jayden, Jaylen, and Jayce. But Jay could make a comeback in tandem with cousins May, Kay, Fay, and Ray.

This nickname for popular and traditional Joseph has a long history of being used as a given name all on its own. Nonetheless, everyone will always assume that Joey is short for the longer form. It might be nice for a potential son to have the option of a more professional and classic name to fall back on.

Jethro, though the biblical father-in-law of Moses, has suffered for a long time from a Beverly Hillbilly image, but some really adventurous parents might consider updating and urbanizing it and transitioning it into the hip o-ending category.

This unpretentious, accessible, and optimistic ("everything's jake" -- meaning OK) short form of the top name Jacob is itself widely used, though more parents these days are opting for the full name Jacob. Jake (born Jacob) Gyllenhall is its most prominent current bearer.

This quintessentially common last name makes a distinctive if first, given to more than 230 babies in the US in the most recent year counted. It has doubled in use over the last decade.

A biblical place name with trumpeting verve and strength.

Another name for Jupiter, king of the Roman gods, this jovial name is eminently ready for modern use. Feminine variations include Jovita and Jovie.

Journey is one of the hot new spiritual names. Although Journey was given in 2015 to over 1100 baby girls and fewer than 100 baby boys, it's more visible on the celebrity baby scene as a boys' name: Megan Fox and Brian Austin Green just chose the name for their third son, who also has the unisex middle name River.

Jupiter's partner Juno has entered the mainstream, so it's possible that her divine mate could follow. But not necessarily for boys — Jupiter is currently mostly female in the US, thanks to its similarity to Juniper. Stars including Ed Sheeran and Ashley Tisdale recently welcomed daughters named Jupiter, which could shift the balance even more towards the girls.