Isaac Oyler was merried to Annie Frances Isabella Hoare who was the sister of my grandfather Basil O´brien Hoare. I found information about the Oylers in the history of Argentina colonization. They founded a colony in Sanabria, Cordoba province. She was a very nice looking woman. After Isaac death she married a dutch count named Vincent Leopold van Tuyll. I understand she had a grandson named Justiniano de Ledesma who was a movie star in England, John Justin.