His parents John and Anne Rogers Clark had ten children, six sons and four daughters:
He therefore had 9 other siblings:
1.) Gen. Jonathan Clark (b. Aug 1, 1750) married Sarah Hite.
2.) George...
I just read a blog entry by Jesse Williams in The Huffington Post where he referred to "his brothers and him." Didn't say how many, obviously brothers is plural. No mention of any sisters.