I have no info on a George or a John M, but will do some Look ups later.
I believe Delarieve was from the Manistre family, and can provide ancestors if you wish.
Back to the Marriotts Mary marriedd William Cook 9/11/1821 Micah married Martha Sharmam 8/10/1834 Martha married Francis Bradley 13/11/1820 They had a daughter Martha circa 1839. Mahala died 1883 apparently a spinster. Martin died 1884. Mathius married to as yet an unknown wife who gave birth to Amelia Marriot in 1849 at Tostock, Suffolk. Possibly he is the father of your other two George and John M. Amelia married Philip Buckle one of my ancestors in 1871. They had 3 sons. From there I know the story in detail.
Strangely, all the other Marriott boys, just seem to have disappeared of the face of documented earth i.e 1851 cencus, IGI, and NBI. Maybe they emigrated?
Would you like to know of the Manistre or Buckle conections?I would very much like to know of your interest in the Marriotts.