Admiral Sir Richard Rodney Bligh born 1737 - 1821, his father was Lieutenant Richard, 1713 - 1749. This line stems from a Richard Blighe born 1555 - he had two wives - first Susan Treybanlette and second Elizabeth Inglette. Francis, William of the Bounty's father comes from the second wife's children. Admiral sir Richard Rodney stems from the first wife. Your question - yes they are related, but distantly. Depends on whether the male line or the female lines are important to you. I am descended from the first wife.