Oscar Hammerstein II went by Ockie.
Oscar Javier Gutierrez II goes by The Bear, Oso, and O.J..
Hammerstein's son jimmy went to school with Sondheim. they became friends and when Sondheim met jimmy's father, they connected. Sondheim didn't know his own father and held his mother in contempt (the feeling was mutual) so the Hammerstein's became like his adoptive family. When Sondheim was a teenager he decided he wanted to go into Oscar Hammerstein's line of work and from then on was mentored in the art of composing and writing lyrics and all other things theatre by Hammerstein.
Oscar Hammerstein II attended Columbia University, where he studied at the School of Journalism but left before graduating to pursue a career in theater. He also had a formative experience studying music at the University of Pennsylvania. His education and early experiences in the arts significantly shaped his later success as a lyricist and playwright in musical theater.
Oscar Redman goes by Oz.
Oscar Ustari goes by Osky.
Oscar Lusth goes by Ozzy.
Oscar Janiger went by Oz.
Oscar Sainz goes by Oski, and Primu.
Oscar Pistorius goes by Blade Runner.
Oscar Steer goes by Bunny, and Rabbit.
Oscar Goodman goes by Mayor Martini.
Kok Kien Woon Oscar goes by Oscar.