I have been researching a Norris family from Carrowbeg, Inishowen and there is a connection to the Caldwell family of Tircreevan, Magilligan. I came across this posting on the Caldwells and although inactive for a while I think we may be dealing with the same family?
William Caldwell (son of John & Margaret Caldwell) died 20 Feb 1891 in Montrose, Dane County, Wisconsin. According to a bio in the History of Dane County he was born in the parish of Magilligan Co L'Derry in Dec 1825 and emigrated 1843. He married:
1. Margaret Norris (born Donegal) in Exeter, Green Co, Wisconsin in 1851 and that had a son William Norris Caldwell 9 Dec 1851. Margaret N Caldwell died Oct 1852
2. Mary J Shepherd 17 Dec 1868 in Montrose, Dane Co, Wisconsin & they had issue a dau Mgt H Caldwell c.1871
Margaret Norris (1834-1852) 1st wife of Wm Caldwell was the daughter of William Norris (c1796-1868) of Carrowbeg by his wife Margaret Kane (c1801-before 1841) who was from the Kane family of Lenamore, Magilligan (Kane family moved from Lenamore to Brogalsco in Myroe where descendants live today).