Nairobi, May 10 -- It is rare to hear about Muhoho Kenyatta, the younger brother of former President Uhuru Kenyatta and the quiet pillar behind the commercial dynasty built by Kenya's founding president.

It is even rarer to hear from the youngest son of Kenya's founding President Jomo Kenyatta and former First Lady Mama Ngina-and when his name surfaces, it is usually because something significant is unfolding within the Kenyatta business empire.

This time, the extraordinary event that thrust Muhoho into the limelight was the acquisition of a controlling 66 percent stake in NCBA Group, where the Kenyattas have a significant interest, by South African financial services provider Nedbank Group.

It emerged that Mr Muhoho, 61, is the top in...