Dear Paula, Circa of birth year would be helpful.This is likely the James Dolphin Floyd, son of Thomas Beckwith Floyd (born 1802) and Martha Daniel Hunter (b. 1807, d. 1840).You can find a letter written by Thomas Floyd at http://www.tamu.edu/ccbn/dewitt/gonreliefframe.htmhttp://www.tamu.edu/ccbn/dewitt/gonreliefframe.htm where enumerates his children, and James Dolphin Floyd is listed as one of them.
Thomas states: "I have 6 living Children, 4 Sons & Two Daughters. One is dead, my oldest son. There Names are as follows. 1st De Witt Clinton oldest dead. 2nd John Curtis Elliott. 3rd Henry Drew. Thomas Penuel. James Dolphin. Rebecca Ann Priscilla. Martha Elizabeth Savanah. There Mothers name was Martha Daniel Hunter. She died Octr. 14th 1840. Born Decr. 16th 1807. I Married my present wife Feby. 1lth 1841, name Ann Sharp; never had but one child, stilled born."