Relatives of Peter Dougan Capaldi of Glasgow Scotland

Hi,
My name is David Conway-Dougan, my Birth Mother is May Dougan. She was born in Sydney Australia on 28/05/1928. She had 2 brothers Thommy Dougan and Peter Dougan, 2 sisters Nancy Dougan and Issabell Dougan (Bell) sadly all deceased.Her brothers and sisters were all born in Glasgow Scotland. Her parents names were Peter Dougan and Mary Dougan ne Mc Donald.
I believe that Nancy Capaldi ne Dougan (Peter Dougan Capaldi of Dr Who Fame) is my mother's Auntie.
If there is anybody related to my mother (May Dougan) or my Uncles/Auntys (Thommy,Peter,Nancy and Bell) or Peter Dougan and Mary ne Mc Donald of Glasgow or has any information on my family I would very much like to make contact.