I assume that your message about Sevilla/Sabilla/Sybilla MILLER was meant for me. (smile) It would be terrific if you do have something on her and who her parents were. As you can imagine, I have searched everywhere under the MILLER and even MUELLER/MULLER surnames since she probably had German and/or Swiss background, too. The HALLER family began in Switzerland.
It is so frustrating to have so much information on Henry HALLER but nothing on either his wife or his son William's wife! Of course, that is the way it is with so many wives and woman from the 18th Century.
Thanks for any help!