The following aircrew were killed in Bomber Command - may not be your chaps, but.......
P/O CD Frost 144Sqn Hemswell. Hampden. KIA 23-24 Jun 40 Gardening
He had previously been in a crash on approach to Scampton on a ferry flight on 18-19 Jun but had survived.
P/O CR Frost 83 Sqn Scampton. Manchester. KIA 8-9 Mar 42 Essen.
P/O CA Frost 44 Sqn Dunholme Lodge. Lancaster. KIA 30-31 Mar 44 Nurnberg.
There are a good few other Frosts who were lost in Bomber Comand, but these are the only ones with the first initial "C". I do not have their crew position to hand.