O'Donnelly Coat of Arms and Surname Origin

Many O'Donnelly families will find their roots under Donnelly, the form most records use.

Before spelling was standardised, one family could appear under several forms. With its O' prefix, O'Donnelly keeps Donnelly intact and marks descent in the older style.

Looking for a O'Donnelly coat of arms? Arms were granted to families, not to surnames, and our research shows which heraldic tradition fits yours. For the full story, order the O'Donnelly surname pack.