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I'm looking for Donald Ferguson, born Blair Atholl about 1828, married Mary and moved to Liverpool.  He had three daughters Mary, Catherine, and Margaret.  The 1891 census gives his name as Donald, place of birth and age, and his first grandson was called Donald, but Mary's marriage certificate gives his name as Daniel.  I haven't found records about him other than the 1891 census.  He was a coachman.  Maybe one of the readers of this thread has information.