I can't be sure that your George is the brother to my Edward. Edward's parents were John Dengler and Catherine Frietag; in 1880 they had the following children: William, Charles, Edwad J., August M., George (b. abt. 1870); Albert, Francis (or Frances) and Mary. I can find marriage records for 6 of the children, but not George, on the City of Rochester website. In 1900 there were several Dengler families residing on Brown St.: August, Henry, John and Charles and a George. Don't know if they were related. The 1936 Roch. City Directory lists 31 individuals with the last name Dengler; five were still residing on Brown St., and one, a dentist, had his office on Brown St. Maybe eventually we can connect George and Edward somehow.