I have managed to find the following settlers - both of which have the name Proudfoot Cooke, but their names are different to those given by yourself. Possibly they are relatives. If you look on familysearch, Africa, Natal marriages there is a marriage certificate for a Blance Proudfoot Cook who married a Roston Edgar Atwell in Durban on 6 June 1935.
On eggsa.org there is a tombstone for Edward Cooke and Annie Adeline BERCH (not Berg). There is also a memorial for Edward Long Cooke (25/5/1888-3/7/1961) who is buried with Doris Eliza Cooke (21/2/1899-17/5/1970) as well as a Gerald Montgomery Tomkinson (11/2/1946-20/9/1968).
If you google Blanche Jane Proudfoot Cooke she appears in a number of family trees on the internet.
Hope all this helps!
Cooke or Proudfoot, Ellen
Last Name: Cooke (nee Proudfoot)
First Name: Ellen
Date of Birth: 1828
Place of Birth: Dublin, Ireland
Parents – Father: George Proudfoot
Parents – Mother: Ellen
Name of Spouse: Charles Cooke
Marriage Date:
Marriage Place:
Date of Death: 17 May 1856 age 28
Place of Death: Swellendam, Cape
Notes: DN 3824/1856. Children:
Charles
Edward
George
Ann Jane
James
Cooke, Charles
Last Name: Cooke
First Name: Charles
Date of Birth: 1816
Place of Birth: Dublin, Ireland
Parents – Father: Charles Cooke
Parents – Mother:
Name of Spouse: 1) name unknown 2) Ann Proudfoot, b. 1830 Ireland to George Proudfoot & Ellen; she d.21 May 1868 age 38.
Marriage Date:
Marriage Place:
Date of Death: 31 Dec 1863 age 46y 11m
Place of Death: Cape Town, Cape
Notes: DN 960/1864, 4442/1868. Children:
Charles (by 1st wife)
Edward (by 1st wife)
George (by 1st wife)
Anne (by 1st wife)
Ellen (by present wife)
Robert (by present wife)
William (by present wife)