I have a Decatur Gillikin and Sabra his wife listed as parents of John H. Gillikin b. abt 1881 who married Julia Golden (b. abt 1886)16 Nov 1904 and Alvin W. Gillikin b. abt 1882 who married Delilah Piner (10 Oct 1887 - 31 Jul 1977) 8 Mar. 1905. This information came from Early Carteret County Marriages 1868-1913 by Sharyn Guthrie. The other information that I have came from Pat Gillikin over the Ineternet. The children are who you listed. Jack is b. abt 1884 he married a Julia (b. abt 1892) and had children Ruby b. abt 1907, Avin b. abt 1910 and Jack Jr. b. abt 1912. Jack Sr. could be the same as Jack who married Julia Golden. The wives first names are the same. I don't know if this helps.