Blickenschlägeris (or was, these maps reflect usage in the early 20th century) used in parts of North-Western Germany and Schleswig-Holstein, which would be right for a loan into Danish. Austria seems
‘thought/ argument that the simplest answer is usually the correct one’ I would dare to say that the explanation that “a contraction of vuestra merced” gave castilian ‘usted’ would be a more complex language phenomenon than to assume there was an arabic loan word that was used as a ...