Coats of Arms of the Respectable Royal and Knightly Houses, their blazon and history is book writed by Jan of Attre about heraldry of Continent, houses and realms such as Redania.
Except
Note: that these excerpts have been inexpertly translated from the original Polish!
The colours of the Kingdom of Redania are: white and red, and the coat of arms from time immemorial has been the silver eagle in a red field. Of this eagle, the ancient emblem of King Abrad the Old Oak, various motions and forms were, notwithstanding presently the insigne is like King Radovid IV had determined and approved in edict: Gules, an eagle displayed Argent crowned, beaked and membered Or, grasping in the dexter claw an sceptre Or. The eagle is charged on the breast with an escutcheon: Sable a cross Or. Escutcheon is arms of Jamurlak, country located in the interfluve of rivers Buina and Braa ultimately vassalized by Crown of Redania during reign of Radovid the Bald.