Football player Otto Graham; Nobel Prize winners Otto Wallach, Otto Hahn, Otto Stern, Otto Loewi, Otto Warburg, and Otto Meyerhof.
Famous people named Otto:
It's just two letters, repeated twice, so you can hardly shorten it. Unless you want to call him Ott.
Otto the Great is considered to be the founder of the Holy Roman Empire.
150+ Boys Middle Names That Hit The Sweet Spot Of Unique And Traditional, Fab Four-Letter Names For Boys, Flip This! Palindrome Baby Names For Boys And Girls, Going Medieval: Baby Names From The Middle Ages, Outrageous O Names For Baby Boys, Boy Names Ending In O, Double The Fun: Boy Names With Double Letters, Boy Names People Won’t Shorten, Terrific Two-Syllable Boy Names, Short, Sweet Baby Boy Names,