Bellamy is an English surname, though the language is French, Bel Ami, "fair friend".
Muzingo is a mystery. I assume it is the same as Mozingo, for which see here -
http://www.ancestry.com/learn/facts/Fact.aspx?fid=10&ln=MozingoMozin, Mouzin, Mouzineau are all French surnames, but how to explain that -go?