Robin Gillies Wilson - Looking for cousins

I am trying to locate my cousins Edmund Francis Wilson born 1945 married to Gail Benette Tennant now retired worked for Group 5 at some stage.Son of James Ian Wilson 1915-1991. Was a director of Union Corporation and Eugene Wilson Nee ? who was a nursing sister who trained ay Grays in Pietermaritzburg. Edmund has a brother John Wilson who I think was an attorney and a sister Dian who was married, lived in Australia and divorced.Any help will be appreciated.