McGowan/Burne

Looking for information on a connection between the McGowan and Burne families.  Sarah McGowan b. 1845 Ireland, father John McGowan.  Emigrated to Troy, NY around 1865, had an uncle Peter McGowan living there already.  Her sister, Norah (b. 1849) m. Dennis Burne of Sligo, resided in Newark, NJ.  Dennis's uncle Martin (also of Sligo, resided in Newark).  Martin Burne and the uncle Peter McGowan knew each other, Martin was the executor of Peter's will.  Many of Peter's children moved to Newark or stayed with/married the Burnes over the years.  Need help finding where in Sligo they were from to help break through this brick wall.  Basic info on the key players:

Sarah had following siblings:  Norah, Catherine, Anne, Peter  mother's name was Bridget, father John

Dennis Burne:  b. 1845, parents unknown.  emigrated around 1857 

Martin Burne (presumed uncle) b. 1824 Sligo, d. Newark, NJ 1912  emigrated around 1845

Peter McGowan (Sarah's uncle):  b. 1823 Ireland, emigrated before 1850 to Troy, NY.  Died 1876