Over the centuries the name O’sullivan may have had many changes and the present form, according to our studies, appears to be different from the original. It is important to realize that the name may have gone through dialect variations, contractions, shortened forms of the original one, lenitions, errors due to incorrect transcriptions and voluntary changes. Therefore, we believe that the surname O’sullivan came originally from O’Sullivan, on which we are able to provide the following historical and heraldic information taken from bibliographic sources of Araldicus. The surname O’Sullivan of Irish origin.It is one of the most Irish of names,being the third most common sur…
Coat of arms: Per pale gules and azure, on a fess …