Dr Thomas Nyambane, a retired professor and a leader of the Kenyan community in the US state of Minnesota, died from Covid-19 on May 17 aged 69.
Through fundraising efforts and other acts of generosity, Dr Nyambane sought to assist Kenyans in Minnesota and in his native land, Ms Kambuni added.
After moving from Kenya to the US in the 1980s, Dr Nyambane earned a bachelor's degree from the University of North Texas, as well as two Masters' degrees and a doctorate in philosophy from universities in Minnesota.
The family is trying to respect Dr Nyambane's oft-stated wish to be buried in his homeland, Mr Kambuni said.
In addition to Mr Kambuni, Dr Nyambane is survived by Alice Nyambane, his wife.