help needed, Lewis Family Wales-S.Africa

[margam]

Hi, I'm completely new to this site, so I'm hoping some kind person(s) can help me out, as I'm about to give up on this fam. I'm looking for the S. African branch of my fam. Rita (Lewis) married John Fowkes/Foulkes (can't find a marriage for them on freeBMD in the UK) they had 4 children, Rosalind, John, Rosemary Anne, & David (can supply spouses names) & they had 7 children between them, unfortunately I have no dob/m/d. all this info came from a maiden aunt, Jessie Curtis (now deceased) who use to visit relatives in S.Africa, (she mentioned Jo'burg a lot) Rita's parent were from Cardiff, Wales, UK, they were Florence Annie Curtis b.1882 Cardiff & Albert Edward Lewis b.1881 Cardiff, they were married in Cardiff in 1905. If anyone can find any info on this fam. or can suggest where I can look, please please get in touch. many thanks.
Margam