About the Joannis surname
The surname Joannis may have undergone spelling adaptations as it was transmitted, but its exact origin is not asserted here without surname-specific onomastic support. The canonical form used here is “Joannis”; phonetic or spelling differences found in indexes should be checked against the other information in the record. Historical records therefore remain the best basis for following its form and distribution.
Pronunciation:
Joa-ni/ʒɔani/