This name is shown on a marriage certificate as being the father of James Dolan born in Ireland around 1865, occupation shown as Mariner but living in Poplar, London, marrying Alice Mary Tucker in 1884.
Not sure where in Ireland he came from but know James was a Catholic.
Know it's difficult to locate Irish locality but thought as his father Hipparchus was an unusual name, I would be able to locate where in Ireland came from but having no luck so far.
Any ideas gratefully received.