My great grandfather came to Brooklyn from Alsace.His name was Edward Muller (b? - 1954) and married to Grace Theresa (1877-1936).They had several children - among them: my grandfather Frederick Muller (1896-1974), Theresa Grace Muller (1895-?) who became a head nurse and author; Alice, Carolyn (1901-?).The family remained in Brooklyn until the early 1950's.
Any chance you have an "Edward" listed in any of your records - either as a brother or son of John?