Mary Ann Avann's daughter Hannah Avann Forest married George Fenton, my dad's great grandfather. They had a son John Albert Fenton who married Sarah Jane Cope and they moved to the US with their daughter Clara Irene Fenton (my grandmother) in 1909. I do not have any other information on Mary Ann Avann...I have just started my research though, and came across your question. Have you found any other information in the years since you wrote your inquiry? Hope you have found the info you were searching for...this is very interesting!