The family's escutcheon - two red bars set in silver - has remained the same since very ancient times. 

The oldest known presentation of the escutcheon is found on a deed of the Kamenz convent, from the year 1352, now in the Breslau Records Office. It was the seal of the knight Cunad (Conrad) de Ribenicz. 

The escutcheon appears next, without crest, on the sarcophagus of Duke Bolko II of Schweidnitz, who died the in the year 1368 and was buried in the convent of Grüssau. It was an honor bestowed only on the first among a prince's retainers, but it is not known for which Reibnitz the escutcheon was presented. 

In the 15th century and later the escutcheon appears with crest, consisting of two buffalo horns, of which the front one is red, the rear one silver. 

The coat of arms has remained so to the present day, and only the line of Barons, with its elevation in 1724, experienced a change in its coat of arms in that the baronial coronet has been set on the escutcheon, on which two helmets rest. The front uncrowned helmet bears the buffalo horns of the family coat of arms, while the rear crowned helmet bears, in front, a silver eagle's wing with green leaf, and in the rear a red buffalo horn. 

In relation to both the brothers Johann Leopold v. Reibnitz and Christoph Friedrich, who were made barons in 1724, Professor Pauli writes in his An Account of the v. Reibnitz Family: The brothers made Barons von Reibnitz wanted no change in their coat of arms, other than that each added to his crest a part of the crest of his mother, the elder the eagle's wing of the Debschütz crest and the younger the horn of the Tschirnhaus crest.” 

Finally it is worth mentioning that, according to family tradition, the word "lieb" (beloved) was written between the bars on the coat of arms. 

After family tradition, the forebear of the family was said to have used his body to cover his prince in a battle, and thereby to have received two sword wounds. As thanks the prince knighted him and granted him a coat of arms with two red bars and the word "lieb" between them. 

This tradition has not been confirmed by historical research, as the word "lieb" is not found on any of the authenticated coats of arms of the family. 

Only once was this found on an escutcheon, that of Diprand Reybnicz of the House of Kaubitz , who died on 21 August 1449.
 

Source: Vice-Admiral Paul Freiherr v. Reibnitz, Berlin 1901
Geschichte der Herren und Freiherren v. Reibnitz - 1241 bis 1901