↑ "Scotland Births and Baptisms, 1564-1950," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XTJ9-DX1 : 10 February 2018), Andrew Giffen, ; citing Southend, Argyllshire, Scotland, reference - 2:16BHS4H, index based upon data collected by the Genealogical Society of Utah, Salt Lake City; FHL microfilm 1,041,076.
↑ "Scotland Marriages, 1561-1910," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XTKJ-WM5 : 10 February 2018), Andrew Giffen and Jean Huie, 22 Apr 1825; citing Southend,Argyll,Scotland, index based upon data collected by the Genealogical Society of Utah, Salt Lake City; FHL microfilm 1,041,076.
Find A Grave: Memorial #53390314 · Find A Grave, database and images (https://www.findagrave.com : accessed 15 August 2018), memorial page for Andrew Giffen (21 Nov 1789–4 Feb 1862), Find A Grave Memorial no. 53390314, citing Scottish Cemetery, Caledonia, Boone County, Illinois, USA ; Maintained by Terry Magyar (contributor 47053508) .
GIFFENs of Rocford, IL family tree at ancestry.com
1850 US Census
"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M854-YK6 : 12 April 2016), Andrew Griffen, Harlem, Winnebago, Illinois, United States; citing family 70, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.)
Andrew and others in this early Argyll family used the GiffEN spelling of their surname. While some branches of these Kintyre Scots who emigrated would later adopt the GiffIN spelling (my mother was June Giffin) in Scotland, especially Argyll, the name is nearly always spelled ending in "EN".
I have a family tree for this GIFFIN family at ancestry.com. It's labeled "Giffins of Rockford, IL". My Robert and Mary (Bane) GIFFEN family also immigrated from Argyllshire, Scotland. I suspect the two families are related.