Henry Gaffney Logan — Dr. H.G. Logan — was the son of John Randolph Logan and Sarah Patterson Jackson Logan. His profile in Logan Connections is most interesting. He was born in 1847 in Cleveland County, North Carolina, and died in 1904 in Independence County, Arkansas. In his youth, he was called Gaffney by his father and brothers. A couple of censuses have his name Patrick Henry Gaffney Logan, the only place we’ve found that forename.
Source: Confederate Veteran, page 500