When Rhonda McEwen received her official royal letter of appointment as an honorary captain of the Canadian navy in Halifax on June 21, it marked the latest chapter in her remarkable family history.

In 1820, her ancestors boarded a schooner in Halifax harbour, fleeing ill treatment and discrimination for an uncertain future in Trinidad.

"It blows your mind," McEwen said, reflecting on how her naval honour connects to her ancestors' journey.

Honorary navy captains are distinguished Canadian leaders…