This variation of Theodore is familiar here mostly via the great Russian novelist Dostoyevsky. It was also the name of three early tsars of Russia.

Liodor is the Leo and Theodore mash-up you didn't know you needed — with authentic Russian roots! It ultimately derives from the Greek name Heliodoros.

As Polydoros, this rare Greek name belonged to several figures in Greek mythology, including a son of King Priam of Troy.

Salvadore is a variant spelling of Salvador, a masculine name with Spanish and Portuguese origins meaning 'savior' or 'rescuer.' The name has deep religious significance in Christian traditions, referencing Jesus Christ as the Savior. This alternative spelling with an 'e' at the end gives the name a slightly different visual appearance while maintaining its pronunciation and meaning. Salvadore has a romantic, Mediterranean quality and carries associations with passionate artistic expression, partly due to famous namesakes like the surrealist painter Salvador Dalí. While less common than the standard spelling, Salvadore appeals to parents seeking a name with spiritual significance, cultural richness, and a touch of distinctive flair.

You’re most likely to find this Theodore cognate in Eastern Europe, where it ranks among the top names for boys in the Czech Republic, Slovenia, Poland, and Romania. The nickname Teo is a real winner.

A streamlined spelling of the classical British Thackeray — no wonder this is the more common variation in the US. Thackery makes a preppier, more unusual alternative to Zachary.

The name of the King of Rohan in J. R. R. Tolkien’s The Lord of the Rings, supposedly a translation of Rohirric Tûrac ("king"). Tolkien based the Rohirric language on Old English.

Theodoric feels prehistoric, though with short form Theo one of the hottest names around, this old German names for boys may soon feel new again.

Theodoro is a masculine name with ancient Greek origins, derived from the elements "theos" (god) and "doron" (gift), literally meaning "gift of God." It represents a Latin or Spanish-influenced variant of Theodore, which has been carried by numerous saints, scholars, and leaders throughout history. The name conveys qualities of divine blessing, wisdom, and leadership. While Theodore is more common in English-speaking countries, Theodoro maintains stronger usage in Spanish, Portuguese, and Italian-speaking regions. The name offers a distinguished historical lineage with a melodic quality. Its multicultural appeal and timeless meaning make it a thoughtful choice for parents seeking a name with both gravitas and spiritual significance.

Known as a British royal family line as well as a style of architecture, this name feels both solemn and formidable, but with an intriguing "dark-academia" feel to it too. Currently in the Top 1000 in England and Wales, it is also used in Romania and Moldova.