You may be interested to know that I'm also descended from Joseph Bryan Geoghegan via Jane Geoghegan, daughter of his first marriage.
I don't have all the details but I believe Jane married my great grandfather, surname Bird, somewhere around 1870-72. He and a partner named Bingham performed as Bingham and Bird, 'black grotesques' at several theatres including Leeds, Bolton, etc.   My grandmother was Jane Bird and amongst her siblings were Bessie Bird, a music hall performer, and Sydney Bird who performed under the name 'Una' as a trapeze artist. He was killed at the young age of 16 by falling, without the benefit of a safety net. I have a photograph of his grave in Liverpool, copy of a birth certificate for Jane Geoghegan born at Salford 1852, and in memoriam cards for Joseph Geoghegan died 1867 age 26, and Bessie Bird and Sydney Bird