Joel is one of those boys’ names that's never been super-popular yet has never been UNpopular either -- it's been in the Top 400 in the US since we started keeping statistics in 1880. So it's inevitable that its female form Joelle would gain visibility too, and indeed Joelle was used most widely during Joel's reign in the Top 100, from the late 1960s through the early 1990s.

Eliyahu is the Hebrew form of the increasingly popular Biblical prophet name Elijah, also found in forms Elias and Eli. There were 100 boys given the name Eliyahu in the U.S. in 2012. Its upside is that it's one of the most distinctive forms of the name, but that final yahoo may prove difficult.

Like many spelling variations of popular names, Jonathon's star rose and is now falling along with that of the original Jonathan. Jonathon occupied the very last spot on the boys' US Top 1000 in 2016, at Number 1000. Parents in search of an Old Testament boys’ name today tend to look for more original choices, from Ezra to Abraham to Moses.

Cute nickname with multicultural appeal — in addition to Yoav, Yovi could be short for names such as Yovan and Yovani.

Some people may prefer this spelling to clarify the name's connection to John, but it could be one h too many, exemplified by its steady decline over the past two decades.

Quintessentially sweet and innocent unisex name of the 1960s and 70s, now gone the way of hot pants and disco balls.

Fien is a popular enough girls' name to make the Top 100 in The Netherlands. Dutch parents love nickname-names taken from the last vs. the first syllable of a name, like Sanne for Susanne or Lotte for Charlotte.

An alternative to the formerly male Ariel, which is now in the grasp of "The Little Mermaid."

There is much disagreement about the origin, meaning, or even existence of this name. Some sources cite Jesiah as the name of several minor Biblical figures, others say it's a variation of Josiah, still others call it a modern conflation of Josiah and Jesse.

Despite its biblical pedigree and popularity in Israel, it has far too many ties to the lethal submachine gun to find many fans here.

Sef is a rising short form of Jozef in the Netherlands, where it outranks its parent form.

The "Tz" beginning of Tzofia represents the Hebrew letter tzadi, which is pronounced more like ts. So Tzofia sounds like Sofia with a light t at the beginning — intriguing, but a difficult sound for a native English speaker to reproduce. While Tzofia is a distinct name from the megapopular Sophia and Sofia, many people will hear it as a cognate and pronounce it the same...or like Zofia.

Rarely used in the last two centuries, but might be worth dusting off and holding up to the light.

Biblical names are expanding (literally) as some parents move from Isaiah and Elijah to more elaborate choices with simple short forms, like Jedidiah and Zebediah.

Gedaliah is a somewhat obscure biblical figure who ruled Judea under the Babylonians. In the past it has mainly been used by Jewish parents, but now it has some potential as an unusual name with that stylish Old Testament sound.

Seosaimhín is the Gaelic form of Josephine, most notably borne by traditional Irish singer Seosaimhín Ní Bheaglaoich.

Long forgotten Old Testament name with modern potential.

Short form of Yonatan heard throughout Israel.

As a male name, Joni is a nickname for Jon or Jonathan, akin to Johnny or Jonny. It's more commonly used as a girl name, where it originated as a nickname for Joan.

A unisex Scandinavian name. Joa is more common for boys in Finland but equally split between sexes in Sweden and Denmark.