O'Shaughnessy — Family Name, Records and Arms

O'Shaughnessy began as an Irish family name. In Elsdon Smith's reading, the name described “grandson of Seachnasach, (elusive)”.

• In the 2010 US Census, 3,246 Americans gave O'Shaughnessy as their last name (rank 9,940).

Arms associated with the name

If an O'Shaughnessy family bore arms, our report explains whose they were and what the blazon shows. Research your O'Shaughnessy family history with a full surname report and painted coat of arms.