Hey! I just started resesarching my Rickman roots yesterday, and so far the only thing I know is my great-great Grandfather is John Rickman. He is the father of Noah Rickman Senior, who is the father of Noah Rickman Junior (my grandpa). Noah Rickman Senior was born on Oct. 8th, 1900 and died 1959. John Rickman had to have been born around 1880, as he would be around 20 at this date to father Noah. John had one brother that I know of: Will Rickman from Ohio.
As I get more info, I'll let you know.
PS I love this site...it's very informative...