Variation of Anthony, and more true to the original Latin spelling. The Roman statesman Marcus Antonius is usually known as Mark Antony in English.

Antony

St. Arsenius (or Arsenios) the Great was a 5th-century Roman saint remembered for his influence on asceticism.

Arsenius

Athenagoras

A British-accented Greek name with an intellectual image that has been off the U.S. charts since 1966, but was a Top 300 name at the turn of the last century. We have the feeling Cyril's ready for a comeback.
 Cyril is the name of several saints, including the ninth century Greek missionary who invented the Cyrillic alphabet. In literature, there are Cyrils featured in the Gilbert & Sullivan operetta, Princess Ida and D. H. Lawrence's novel, The White Peacock. 
 Oscar Wilde named a son Cyril. Cyrilla and Cyrille are the appealing female forms.

Cyril

Chariton

Cyprius

Cyriacus

Demetrios

Eirenikos

Widely used in the Hispanic community, as is the shorter Isai. While the original Isaiah and cousin Isaac are much more popular, Isaias commanded attention as the name of a storm in the summer of 2020.

Isaias

Isabel and Isadora are back: could it now be time for a more widespread revival of Isidore? In 2014, both Isidore and Isadore were on the list of fastest-rising names in the US.
 A common ancient Greek name belonging to several saints--including Saint Isidore the Ploughman, patron saint of Madrid and the great encyclopedist St. Isidore of Seville, whose work formed the basis of much medieval knowledge--Isidore was adopted by Spanish Jews to the point where it was almost their exclusive property.
 In addition to the obvious Izzy, another traditional nickname is Dore/Dory.

Isidore

Joachim is an undiscovered biblical name with potential, although most modern parents would probably prefer the more lively Spanish version, Joaquin. Like many Old Testament names, it was primarily in use in the seventeenth century, and then became rare. In the Bible Joachim is a king of Judah; according to the Gospel of James, Saint Joachim was the husband of Saint Anne and the father of the Virgin Mary.
 br/>Currently well-used in France, the name Joachim is known in countries and languages around the world and pronounced somewhat differently in each. While American might be most familiar with the Spanish version of the name, Joaquin via actor Joaquin Phoenix, that pronunciation wah-keen is not similar to any of the pronunciations of Joachim, which all have three syllables often with the emphasis on the second.

Joachim

Kosmas

Menas

Metaxakis

Mystikos

Nephon

Niketas

Raphael is a romantic archangel name that sounds both artistic and powerful. Raphael is also a great cross-cultural choice, with significance for people with both Latinate and Jewish roots, plus plenty of grounding in the English-speaking world.
 Raphael was one of the seven archangels (called by Milton "the affable archangel") who attended the throne of God and, as the angel of healing, is the patron of doctors as well as of travelers, science and healing. Another worthy namesake is the great Renaissance painter Raphael (born Raffaello Sanzio). Several celebs have chosen the name, including Robert De Niro, Ana Ortiz and Melissa George.
Rafael is the Spanish spelling, as represented by Spanish tennis champ Rafael Nadal. Rafi is the familiar Hebrew nickname.

Raphael

Symeon

Serapheim

A second-tier classic, the New Testament Timothy moves in and out of fashion more than John and James. But though it peaked in the 1960s, many modern parents still appreciate its familiarity and lively rhythm. And the short form Tim feels eternally boyish.
 Saint Timothy, born of a Jewish mother and a Greek father, was Saint Paul's companion, which might make the two appropriate and compatible <a href="https://nameberry.com/blog/twin-names-the-ultimate-guide">twin names</a>. Timothy was well used among early Christians but not popular in the English-speaking world until the eighteenth century. In the U.S., Timothy was just outside the Top 10 in the 1960s and stayed in the Top 100 until 2008.
 In literature, there is the unforgettable Timothy Cratchit, aka Tiny Tim. In real life, there are director Tim Burton and several well-known actors, as well as a slew of star athletes.
Timothy also qualifies as a botanical name thanks to Timothy grass sometimes known simply as Timothy, which resembles cat's-tail and is used as cattle feed.

Patriarchs' Names