Wilmot was born in
Fredericton, New Brunswick on 16 October 1809. He was the son of John McNeil and Susanna (Susan) Harriet (born Wiggins) Wilmot. He moved to
Saint John with his family at around the age of five, and there he was educated. In 1833 he married Susannah (Susan) Elizabeth Mowat of St Andrews. His father,
John McNeil Wilmot, was a big tank and ship owner. Wilmot worked for his father's business and represented the company in
Liverpool, England from 1835 to 1840. It is there that his son,
Robert Duncan Wilmot, Jr., a future Member of Parliament, was born. ==Political career==