Gorman Family

I am looking for any information about my greaat grandfather, Thomas Gorman, who came to Saint John, New Brunswick, Canada in 1836.  According to the census record for 1851, he arrived from Dromore, County Tyrone with his wife, Ann (Nancy} McQuaid.  He was born about 1811.  There was also a Patrick Gorman and his wife Ellen ? who arrived at the same time.  He was born arount 1800.  We presume they were brothers.  Any information would be greatly appreciated as I and two of my daughters are planning a trip to Ireland in July and are hoping to get to Dromore.