My great great grandfather's name was John Allman. He was born about 12 September, 1840 in Chester, England. I believe his father was a turnkey at the prison there. John immigrated to the United States sometime before 1878. I need help finding John's parents names and his siblings, if any. I would appreciate any and all help I can get. I wish I had more information, but that is all I have. Thank you to anyone who can help me.