"Blend of Marco and Antonio"
The name Marcoantonio is commonly a male name from the "Italian" origin.
Marcoantonio is a compound given name built from two established Italian names, Marco and Antonio, which continue the Roman names Marcus and Antonius. It is a joining of the two elements rather than a separate name with its own root. In United States birth records it is written as a single unbroken word rather than as Marco Antonio.
The pronunciation of Marcoantonio is mar-koh-an-TOH-nee-oh.