Back to that genealogy site - they have Joseph K. NDESANDJO
as Ruth and Mr. MPHURU’s son. As I said before, grain of salt.
The full name of the Tanzanian husband of Ruth was:
Athanasius Ndesanjo Mphuru
He’s photographed and mentioned in this pdf:
http://archives.umc.org/uploads/documents/audo_au_community_%20Feb06.pdf
I did have a link to a webpage with an image and his full name, but that has been recently removed.
Athanius Ndesanjo Mphuru