So far I have been matched up with three people on Family Tree DNA.
My mtDNA is L3 16172c, 16189c, 16223t, 16320t, 16519c. So, does that really mean that these people are related to me in some way? Where exactly is L3 haplogroup from? All I know is that this haplogroup is from East Africa. What is the difference in the letters after the haplogroup letter and number(example L3a)