cousin of sir james galway trying to trace our ancestors

robert galway born abt 1830 married isabella campbell born abt 1836 possibly both from holywood although lived in docks area of belfast
family that lived are
john galway born abt 1860
isabella jane galway born holywood 1867 have no info for isabella
margaret galway born belfast 1870 married william harry brown 1904
james galway born belfast 1877
his son
james galway born belfast 1903