In his will, signed on 17 June 1688, Morgan left his Jamaican property to his godsons Charles Byndloss and Henry Archbold, on condition they adopted the surname of Morgan. These were the children of his two cousins Anna Petronilla Byndloss and Johanna Archbold. To his sister Catherine Loyd he awarded £60 per annum from his estate "paid into the hands of my ever honest cozen Thomas Morgan of Tredegar".
In his will, signed on 17 June 1688, Morgan left his Jamaican property to his godsons Charles Byndloss and Henry Archbold, on condition they adopted the surname of Morgan These were the children of his two cousins Anna Petronilla Byndloss and Johanna Archbold. To his sister Catherine Loyd he awarded £60 per annum from his estate "paid into the hands of my ever honest cozen Thomas Morgan of Tredegar".