Parents were John Sheehan and Mary (maiden name unknown).
1894 death notice (San Francisco, California) indicates that her birthplace was Limerick, and that two siblings, Maurice Sheehan and Ellen Sheehan Fouts, survived her. The notice also says "Boston, Mass. papers please copy." Since Ellen was living in Sonoma County, California at the time, possibly Maurice was in Boston?
Possible origin = Croom