Presumably an Englishman, or possibly an American, living in Italy and appearing in various films during the 1950s and 60s. He does not appear to have had any credited roles, but his identity is known thanks to him appearing in two very famous films, Jean Renoir's La carrozza d'oro (1952) and Mario Bava's Diabolik (1968), with his name appearing in a variety of written documents about those films. So far, I've come across four different variants of his last name (Febo Kelleng, Febokelleng, Fedo Keeling and Fredo Keeling) so it's hard to say which is the correct one...
- La carrozza d'oro (uncredited) .... The viscount
- Le infedeli (uncredited) .... A friend of the Rodgerses
- Londra chiama Polo Nord (uncredited) .... Military judge
- Una vita difficile (uncredited) .... Dinner guest
- Diabolik (uncredited) .... Sir Harold Clark