Not the Mertyns colors, but still gorgeous and still an owl.House Mertyns of Mistwood is a noble house from Mistwood in the Stormlands. They blazon their arms with a white great horned owl on grey. Their words are not known. Ser Michael Mertyns, better known as the White Owl, was a member of the Kingsguard. House Mertyns at the end of the third century: The known Mertyns during the timespan of the events described in A Song of Ice and Fire are: Lady Mary Mertyns, Lady of Mistwood.