Ivaylo Mechkata Ivanov goes by Mechkata.
Ivaylo Natzev goes by Ivo.
Ivaylo Trenchev went by Roko Zhelezniya.
Cvetomir Ivanov goes by Coleto.
Krassimir Ivanov goes by Krassinoff.
Metodi Ivanov went by Mecho.
Lee Go goes by Willy.
Midge :)
Emmett Till was not known to go by any specific nicknames.
David Gohman goes by Go-Go.
Will Englander goes by Will.
My Do goes by Phimy, and MyMy.
Will Young goes by Will.