Hi kenneth, I was doing some research on sectoral heterochromia and your post came up. I have the same conditions, right blue/gray eye with a large brown spot (dark brown hair with olive complexion - but some curls) - for my aunt it was very prononced. My daughter has green eyes with a central light brown ring - central heterochromia. All my aunts have light gray/blue eyes. I am a twin and it runs in the family.
I come from north west of Brittany, in the north west of france - a celtic region with its own dialect (very close to welsh) : I have done some genealogy research: Boul'ch - origin is from wales, cornwall or scotland on one side and Rosec on the other - unkownn) . It has also been documented that this part of France was under strong scandinavian influence, and today Bretons are still a rather closed community (loads travellers & sailers) i can send a pdf. Aby other info is welcolmed,