"Blend of Mia and Bella"
The name Miabella is commonly a female name from the "American" origin.
Miabella is a modern compound of two established given names, Mia and Bella, both of which are used on their own in English-speaking countries. It first appears in United States birth records in 2000, which fits a coined combination rather than an inherited name. The two elements also match the Italian words mia (my) and bella (beautiful), though the name is a formation of the two names rather than a borrowing of the phrase.
The pronunciation of Miabella is MEE-uh-BEL-uh.