Jerry is the nickname for Jerome. Jerome "Jerry" Siegel.
On the show, both Perry and Clark's middle names are Jerome, and Perry's son is Jerry.
Edited to add: My father's name is Jerome, and everyone calls him Jerry.
"Hold on, my friends, to the Constitution and to the Republic for which it stands. Miracles do not cluster and what has happened once in 6,000 years, may not happen again. Hold on to the Constitution" - Daniel Webster
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