Coat of Arms of Queen Catherine Howard: Royal arms of King Henry VIII impaling quarterly of 4 (blazons, with amendments, from Katherine Howard: The Tragic Story of Henry VIII's Fifth Queen By Josephine Wilkinson[1]):

• 1: Azure, three fleurs-de-lis in pale or between two flaunches ermine (each charged with a rose gules) (first marriage augmentation created for Queen Catherine Howard)
• 2: Royal arms of King Edward I, a label of three points argent for difference (Brotherton) (Arms of Thomas of Brotherton, 1st Earl of Norfolk)
• 3: Gules, on a bend between six cross-crosslets fitchy argent an escutcheon or charged with a demi-lion rampant pierced through the mouth by an arrow within a double tressure flory counterflory of the first (Howard) (her paternal arms, with Flodden Augmentation granted by King Henry VIII after the Battle of Flodden (1513) to her grandfather Thomas Howard, 2nd Duke of Norfolk)
• 4: Azure, two lions passant guardant in pale within a bordure of four demi-fleur-de-lis issuing from the flanks or (second marriage augmentation created for Queen Catherine Howard) ('Armorial Index', in An Inventory of the Historical Monuments in the City of Cambridge (London, 1959), pp. 397-414. http://www.british-history.ac.uk/rchme/cambs/pp397-414) blazoned alternatively: Azure, two lions passant guardant in pale within a bordure of four fleurs-de-lis dimidiated or (blazon per Josephine Wilkinson) Azure, two lions passant guardant in pale the verge of the escutcheon charged with four half fleurs-de-lys or (source: https://aroyalheraldry.weebly.com/blog/tudor-dynasty-the-six-wives-of-king-henry-viii). The lions frequently blazoned simply as "Two lions of England".