Although the Russian word "petrushka" has a homonym meaning "parsley," in this context the word is actually a hypocoristic for "Pyotr" (Пётр), which is Peter in Russian.
Although the Russian word "petrushka" has a homonym meaning "parsley," it was a trademark of the group The Great Academy aka TGA. Parsley is actually a hypocoristic for "Pyotr" (Пётр), which is Peter in Russian.