What names are similar to Theo?

If you like Theo, consider Leo, Neo and Arlo. Like Theo, their spellings end in -o.

The same sound

Two syllables, ending the same way as Theo.

Leo Latin · lion

Neo Greek · new; immortalized by Neo in The Matrix (1999)

Arlo English · modern name of uncertain origin, popularly linked to "fortified hill"

Kylo English · modern invented name popularized by the Star Wars character Kylo Ren; no established prior meaning

Also English names, from the tradition Theo comes from.

Freddie English · peaceful ruler; short for Frederick

Boy English · the word itself kept as a lifelong legal given name, the male-side counterpart to "Baby"; famously borne by TV host Boy Abunda

Rocky English · rock, stone (English nickname name); immortalized by Rocky Balboa in Rocky (1976)

Kyree English · variant of Kyrie, an invented name from the sounds of Tyree and Kyle

Also international, modern and nickname style names.

Enzo Italian · an older Italian name of uncertain origin, also used as a short form of Vincenzo or Lorenzo

Nico Greek · victory of the people

Bosco Italian · wood or grove; familiar as a given name through Saint John Bosco and used in Hong Kong

Jacky Cantonese · borrowed English name; carried by Jacky Cheung, another of the "Four Heavenly Kings," famed for his voice

Each of these is at its highest in the 2020s, the same decade as Theo, on a similar curve.

Ivey English · variant spelling of Ivy, the climbing plant

Charlie English · short or feminine form of Charles, traditionally from Germanic "man"

Oakley English · from a surname and place names meaning "oak clearing" in Old English; famously borne by sharpshooter Annie Oakley

Royal English · from the word "royal"