"Blend of Joshua and Juan"
The name Joshuan is commonly a male name from the "American" origin.
Joshuan is a modern formation that joins Joshua with Juan, the Spanish form of the same name, giving a two-syllable ending that matches Juan exactly. The name first appears in United States birth records in 1989, and no earlier use in a documented naming tradition is recorded for this spelling.
The pronunciation of Joshuan is JOSH-oo-un.