"Blend of J and C"
The name Jc is commonly a male name from the "English" origin.
Jc is not a spoken name form but a pairing of the initials J and C, entered in United States birth records as the written short form of a compound given name whose two parts begin with those letters. The entry consists of those two letters alone, so it carries no separate linguistic root or lexical meaning of its own.
The pronunciation of Jc is JAY-see.