Does Anyone Know of John G Milligan Who Married Ann L Connell IN Wash DC IN 1892

My great Aunt Ann L. Connell married John G Milligan on 7/28/1892 at St. Aloysius Catholic Church in Washington, DC. Records indicate that john's parents were William and Elizabeth from Maine. I believe Ann and John remained in D.C. but am unsure. Does any oe know if they had children, what John's occupation was, when each died and were they were buried.
Thank you so much. Please respond directly ro my e mail car.stone@comcst.net
Carolyn