I, too, am researching a Mary MANNIX, and she was from Rochester, NY.Her birth year was abt. 1854.I believe she married a Patrick Burke. I also have reason to believe she was born in Ireland and arrived in the US abt. 1860 with her parents and siblings.Mary also had a brother Daniel (b. 1840) and a nephew Daniel (b. 1881).I love to hear if you believe there might be a connection.