This is the coat of arms used (circa 1575) by the earliest known Overdui(j)n, Bartelomeus Sijmonszoon Overduijn, who lived and worked in Den Haag, the Netherlands, as a shoemaker, alderman and 'Heilige Geestmeester' church authority). He signed several documents with a seal bearing this insignia. There is no evidence that it was granted by any royal authority, and nobody seems to have used it since Bartelomeus - but there is also no reason why we cannot revive it now, if we wish. This reconstruction (by James Overduin and Evelyn Eekels) is based on a written description in 'Het Familieboek Overduin', 1993).