Absalom, because of its biblical and literary associations, just might appeal to the daring namegiver. 
 In the Old Testament, Absalom was the handsome, favored but rebellious son of King David. In literature, Absalom appears in Chaucer's The Canterbury Tales, as the repeated title of a Faulkner novel--which refers to the biblical personage rather than the name of a character-- in the novel Cry, the Beloved Country and, on a more trivial note, as the name of the caterpillar in the Tim Burton version of "Alice in Wonderland."
 The growing-in-popularity Axel is the Scandinavian form of the name.

Absalom

Most American parents would choose to use the more commonly seen variant, AXEL.

Aksel

Arcadia, a name for an unspoiled paradise, makes an attractive secular alternative to Nevaeh or Eden.  For parents who want an unusual name with a friendlier nickname, Arcadia has the advantage of cute Cady.

Arcadia

Casimir, a traditional name of Polish kings, could do quite well these days as we see the rise of Caspian, Cassius, Castiel, et. al. Like Leopold and Laszlo, Casimir is strong and worth considering if you've got an adventurous streak — and bet your son will too. An alternative commonly cited meaning that modern parents might prefer is "proclaimer of peace". The traditional Polish spelling of the name is Kazimir.

Casimir

This name of the goddess of peace creates a lovely ideal. 

Concordia

Subtle but clear unisex way to signal peace, especially in middle place. 

Dove

Federica is the Latin version of Frederica, one of those formerly stuffy <a href="https://nameberry.com/girls-names">female names</a> -- think Josephine and Eleanor -- that feels fresh and elegant again. And Federica has more energy without that first r.

Federica

Frederick, and friendlier nickname Fred, seemed almost to have disappeared, leaving just the memory of Freds past such as Astaire, Mr. Rogers and Flintstone. But today's parents are beginning to recognize it as a strong classic and one of the top <a href="https://nameberry.com/list/341/royal-names-for-boys">royal baby boy names</a>.
 Previously, Frederick had taken on a rather forbidding, foreign, military air, reminiscent of Frederick the Great, the enlightened king of Prussia who laid the foundations of the powerful Prussian empire.
 For African-Americans, Frederick can be seen as a hero name, honoring Frederick Douglass, who rose from slavery to power as a political activist.
 Frederick appears as a character in Shakespeare's As You Like It and the novels of, among others, Jane Austen and Henry James.
The name is often streamlined to Frederic and even Fredric. And if you don't like Fred or Freddie (though we do), another nickname is Fritz.
 Federico is the appealing Italian and Spanish form, as in renowned poet Federico Garcia Lorca.

Frederick

Occasionally used in the African-American community to honor Jamaican activist Marcus Garvey, known as "Emperor of the Kingdom of Africa," though his first name is more frequently chosen. Another possible namesake is baseball player Steve Garvey. Garvey sounds more modern than Harvey. 
 
Variations include Garrvey, Garrvie, Garvie, and Garvy.

Garvey

In the US, this spelling is less common than mid-century favorite Jeffrey, and it has faded from popularity faster. This more British spelling is the usual form for historical figures like Geoffrey Chaucer and the Welsh historian Geoffrey of Monmouth, and as such it may feel more rooted and enduring.

Geoffrey

This appealing Italian name is associated with the great Florentine painter and architect Giotto di Bondone, a major force in the Italian Renaissance.

Giotto

Takes Edwin one step -- make that ten steps -- too far. 

Heddwyn

Serene Irene, the name of the Greek goddess of peace and one of the most familiar <a href-="https://nameberry.com/list/624/gorgeous-greek-goddess-names-for-babies">Greek goddess names</a>, was hugely popular in ancient Rome and again in the United States a hundred years ago.
 One of the most <a href="https://nameberry.com/popular-names">popular names</a> of the Roman Empire and the name of several early saints, this originally Greek name (then spelled Eirene) represented a daughter of Zeus who was the goddess of peace. Often pronounced with three syllables, it spread throughout Europe in a range of variations and is a royal name in Greece, Denmark, and the Netherlands. 
 Much of Irene's popularity in England stemmed from the character Irene Forsyte in Galsworthy's The Forsyte Saga (pronounced eye-reen-ee). Americans identified it with the sparkling Irene Dunne of Hollywood's Golden Age. Irene was a Top 20 name from 1915 to 1925, remaining in the Top 100 until 1945. It still highly popular in Spain.
 Some other references include the eponymous early smash hit Broadway musical, famed ballroom dancer Irene Castle (portrayed on film by Ginger Rogers), the Hollywood costume designer known simply as Irene, the Uma Thurman character in Gattaca, Irene Denholm the Harry Potter student at Hogwarts School, and the lullaby-ready song Goodnight, Irene.

Irene

A dignified yet gentle surname name occasionally heard in England and the West Indies. 

Kynaston

Malu is a charming Hawaiian name chosen by ex-Talking Head David Byrne for his daughter. Malu might also be an abbreviated form of Malou, which is an abbreviated form of Mary Louise.  Malu or Malou might be a retro-chic nickname for a child given the family names of Mary and/or Louise.

Malu

Many parents these days are responding to <a href="https://nameberry.com/list/411/baby-names-that-mean-peace">names meaning peace</a>, and this is one of the more unusual ones (more often heard as a surname). Pronounced PACH-ee-a, it relates to such other peaceful names as PAZ, PAX, and PAXICO

Paccia

Pax, one of the variations of <a href="https://nameberry.com/list/411/baby-names-that-mean-peace">names meaning peace</a> that are newly popular in these less-than-peaceful times, got a lot of publicity when chosen by Brad & Angelina for their Vietnamese-born son. Parents attracted to Pax may also want to consider Paz, the unisex Spanish version, or Paxton, a growing-in-popularity surname choice that shares that magical X-factor.

Short form of the name Anglicized as Saladin, very popular throughout the Arab world. 

Salah

The three soft a's make for a calm and rhythmic name, though some risk of salami jokes. 

Salama

Distinguished by association with renowned African diplomat Salim Ahmed Salim, this name is popular in many variations throughout the Arab world. Its use is growing in the US as well, especially in its Salem version.

Salim

A soft and interesting Hebrew name long popular in France, where it has ranked in the Top 400 since 1986 (as Salomé). Ex-ER star Alex Kingston named her daughter Salome Violetta.

Despite seeing small but steady use during the latter part of the 19th century, Salome has never really caught on in the US – no doubt due to the historical association with the Biblical dancer who asked for John the Baptist's head on a platter. In fact, the dancer is not mentioned by name in the Bible, but the name Salome was attached to this figure by the 1st-century Romano-Jewish historian Josephus. There is, however, another Salome who is specifically mentioned in the Bible: a female follower of Jesus, wife of Zebedee and mother of the disciples James and John.

 Oscar Wilde wrote a play called Salome in 1893 and Richard Strauss based an opera on it twelve years later. In pop culture, the name was given to a seductive vampire character in the HBO series True Blood.

Salome

Familiar as the most common form of greeting in Hebrew, but also associated with top female model Shalom Harlow. 

Shalom

This Hindi word which is used in prayer is one of the prime <a href="https://nameberry.com/list/411/baby-names-that-mean-peace">names that mean peace</a>, always a nice message to impart to a child. Nick Nolte used it for his daughter.

Shanti

Shulamit--which has a variety of different spellings--is a serious-sounding Old Testament name that appears in the Song of Songs. Its common nickname is Shula, which is sometimes used on its own.  Toni Morrison used the sleeker variation Sula in one of her novels.

Shulamit

Also spelled Sigfrid, this hefty German name has an appropriately majestic meaning: "victorious peace". Fittingly, a famous bearer was the English World War I poet and pacifist Siegfried Sassoon. Sassoon was named after the hero of a Wagner opera, which in turn was based on a tragic hero from German legend.

Siegfried

Solomon, a name that evokes wisdom and peace, is an Old Testament name that, along with other patriarchal classics, is finally beginning to shed its long white beard and step from the pages of the Old Testament into modern nurseries. 
 Originating from the Hebrew word shalom, meaning peace, Solomon was a favorite of Charles Dickens, who used it for characters in three of his novels.
 Solomon Grundy is a name that moved from a nursery rhyme ("Solomon Grundy, born on a Monday") to a DC Comics character to the name of a California rock group.
 The biblical Solomon, the son of David and Bathsheba, succeeded his father as king of Israel, and was known for his wisdom ("People came from all the nations to hear the wisdom of Solomon."). He is credited with writing the biblical books Proverbs, Ecclesiastes, and the Song of Solomon—the latter also the title of an acclaimed Toni Morrison novel. The biblical Solomon is that reason that, while the name technically means peace, it also counts among the <a href="https://nameberry.com/list/128/boy-baby-names-that-mean-wise">names that mean wisdom</a>.
 Notable bearers of the name include philanthropist Solomon R. Guggenheim, for whom the New York museum is named, and singer-songwriter Solomon Burke, sometimes referred to as "King Solomon."

Solomon

Uma is a sweet, strong name for a Hindu goddess... and a Hollywood one. But as popular as Uma Thurman is, other parents have not yet picked up on her name, making it a rarity.
 Uma is one of the more than one thousand appellations for the Hindu goddess Sakti, a fact that surely inspired the father of Ms. Thurman, a Columbia University professor of Eastern religion. Her middle name, Karuna, is equally unknown outside the Indian subcontinent.
 In Hebrew, Uma means "the nation," and is therefore sometimes used for girls born on Israeli Independence Day.
 Uma shouldn't be confused with the similarly sounding Una, an ancient Irish name.

Wilfred is one of those Old Man Names that still sounds fusty in the US but is fashionable in the UK. It comes with readymade short forms Will or Fred and might make an adventurous alternative to the ubiquitous William. The central character of Walter Scott's Ivanhoe is the knight Wilfred of Ivanhoe. Wilfred Owens was a well-known British poet.

Wilfred

More familiar now via its Salman form, thanks to author Rushdie; this is an unusual biblical alternative. 

Zalman

An occasionally heard African name, hobbled by a zoolike sound. 

Zuelia

katielea's list "names that mean peace" of 30 great name ideas: Absalom - Zuelia!