Interesting to read that Manx might grey early. My brother turned grey in his 20's. His very dark hair made it obvious. My blond hair seems to have camouflaged it rather well until my 40's, which was about the same time my eyesight conveniently started going. My sister has colored her hair from young age, and doesn't even know her "true color". I don't remember how old my dad was, when his dark hair started turning grey. No aunts, and my only uncle on Mum's side didn't survive WWII. No 1st cousins, or any others, I'm yet aware of.