[1] Uexküll was originally a Bremen noble family von Bardewisch, first appeared in written documents on 26 July 1229, whose lineage can be traced to several places, the earliest originating in Stedingen, and later Old Livonia (modern Estonia and Latvia), Sweden, Württemberg, and Baden.
The family was also part of the German nobility and on 9 October 1790 they were awarded with the title of Imperial Count by Leopold II.
[2] The Bardewisch coat of arms displays two upward facing battle axes, in blue and black.
The Uexküll coat of arms displays a victorious red lion in a golden backdrop.
On the two helmets are red-golden covers facing silver sickles with red shanks.