Hi, My name is Mike. I am the son of Dr. E. Martin of Chicago who retired to Spain and passed away in 2001. My sister that you mention is Katherine. There are more brothers and sisters. Quite a few. From several different relationships that Dad had. Not incuding you we are 8 or 9 already.
I would love to hear from you. Maybe I can help clear up any doubts. Sincerely, Mike