About the Monaca Surname
Monaca sits within the Monaco family of names, which has Italian roots.
The change of ending between Monaco and Monaca reflects the Italian habit of naming a family in the plural or the singular.
Heraldry is personal: arms associated with the Monaco surname were borne by specific families, and sharing the name does not mean sharing the blazon. Research your Monaca family history with a full surname report and painted coat of arms.