Hamilton was not born in the United States. He was from the Caribbean island of Nevis. His father was James Hamilton and his mother was Rachel Fawcett Lavien. Hamilton's mother had a child from a previous marriage that she left behind when she moved to Nevis. At the time, she was still married to another man. This meant that Hamilton was illegitimate. He was very sensitive about this fact. His father had left him as a child. Two years after this tragedy both Hamilton and his mother became sick. Hamilton recovered, but unfortunately his mother died. He was grief-stricken and moved in with his cousin. His cousin committed suicide.