The fleur de lis is a pre-Reformation symbol of purity and of the Blessed Virgin Mary, the patron saint of the Frisians. The arms were taken from the former District of Weener.
In the context of the Frisian people's heritage, the fleur de lis signifies spiritual purity and devotion to the Virgin Mary, revered as their patron saint. It has its roots in the historical region of Weener.