Sometime between 1822 and today Abercrombie Street became Abercromby Street. Can anyone tell me why?

Located two streets west of Frederick Street, Abercromby Street runs from Independence Square to the south (where this photo was taken) to the Queen's Park Savannah in the north. The street was named after the British General (later Lieutenant-General) Sir Ralph Abercrombie, who captured Trinidad from the Spaniards and became the first British Governor of the island in 1797.