On 23&me the DNA results came in yesterday and it exactly states "You & John share the DNA that was passed down from two of your grandparents (his parents)". We have 331cm in common at 4.45%. I am 75yrs old, so this Uncle must be around my age. Doesn't 331 cm seem too low to be my Uncle? what other relative can this be? I supposedly knew all my uncles & aunts.