Hi maec
Thanks for your thoughts.
I've seen that the Courtney family also use the 3 red torteau.
If you go back to my first post on this thread, you can see the original quarterings.
1 - 4 are for the Fynney families (although I can't ascribe nos 2 & 3 to anybody in particular),
then number 5 (which is the first one chronologically), is the 3 red torteau and unknown red pennants.
As I said, Ingelram de Fiennes married Sibyl de Tingerie about 1170. Her father was Pharamus de Tingerie/Tingree, Count of Boulogne, so I think we can say that that '3 red torteau' is the Counts of Boulogne, and not the Earls of Devon. The Courtneys may well have descended from the same people, and carried on with the crest. I think I saw somewhere that it's in Prince Phillip's coat of arms too!
It may well be that the red pennants come from the Tingree side, but I've not been able to track them down. As KGarrard said, tricky when they are French, and way before these things were regulated.