, c. 1892 Brown married
Margaret Tobin on September 1, 1886, in Leadville's Annunciation Church. They first settled in
Leadville, Colorado but moved closer to the mines on Iron Hill in the rugged Stumpftown (now a ghost town). After the birth of their son, the Browns moved back into Leadville, living at 320 Ninth Street and then 322 Seventh Street. The couple enjoyed the opera and theatre and Brown was a member of the Denver Athletic Club and the Denver Country Club. • Catherine Ellen "Helen" Brown (July 22, 1889 – September 18, 1970) was born in
Leadville, Colorado. She married George Joseph Peter Adelheid Benziger (1877–1970) on April 7, 1913, in
Chicago,
Illinois, with whom she bore two sons, James George Benziger (1914–1995) and George Peter Joseph Adelrich Benziger (1917–1985). Catherine Ellen Brown (Helen) died in Jackson County, Illinois. They raised three of their nieces: Grace, Florence, and Helen Tobin. There were other nieces and nephews who lived with the Browns occasionally.
Separation In 1909, Brown and his wife signed a separation agreement. The couple were both Catholic and they never divorced. The agreement gave Margaret a cash settlement and possession of the Victorian mansion on Pennsylvania Street in Denver's wealthy Capital Hill neighborhood, and also the summer mansion
Avoca Lodge in Southwest Denver, near Bear Creek. She also received a $700 monthly allowance (equivalent to $19,066 today) to continue her travels and philanthropic activities. Although they never reconciled, they remained connected and cared for each other throughout their lives. Margaret said of Brown "I've never met a finer, bigger, more worthwhile man than J.J. Brown." ==Death==