I ran a search on your "Wolfien" but currently the name is not listed separately. There are catalogues which contain names such as this:-
http://www.nationalarchives.gov.uk/catalogue/search.asp
Reference WO 24/278: Wolfenbuttel Troops. Year: 1748
In case the surname was incorrectly spelled I also searched for WOLF* and below you can see the results - which are 8 soldiers and 6 legal court cases held in Germany :-
WO 97/737/84 WOLFGANG MULLER Born GROSLANGHEIM, Wurzburg Served in 60th Foot Regiment Discharged aged 48. 1795-1816
WO 97/745/24 JACOB WOLFE Born MIDDLEBURG, Zeeland Served in 60th Foot Regiment Discharged aged 41. 1809-1823
WO 97/745/25 JOHN WOLFE Born ANDERSHEIM, German States Served in 60th Foot Regiment Discharged aged 45. 1797-1814
WO 97/745/26 JOHN WOLFF Born NAKENHEIM, German States Served in 60th Foot Regiment; Hompesch Hussars Discharged aged 44. 1796-1816
WO 97/745/27 JOSEPH WOLFF Born DIESFIELD, German States Served in 60th Foot Regiment Discharged aged 34. 1806-1816
WO 97/1181/404 CHRISTIAN WOLFES alias CHRISTIAN WOLFFES Born ILTEN, Hanover Served in King's German Legion; Hanoverian Troops Discharged aged 44 Covering date gives year of discharge. 1814
WO 121/27/256 JOHN WOLFF alias JOHN WOLF Born HANOVER, Hanover Served in Hanoverian Troops; Halifax Local Militia; 60th Foot Regiment Discharged aged 82 after 29 years of service 1796
WO 121/136/100 FREDERICK WOLFERSDORF Born KOENIGSBURGH, Saxony Served in Brunswick Troops Discharged aged 26 after 4 years 4 months of service Covering dates give year of enlistment to year of discharge. 1809-1813
TRIALS
WO 235/291 Defendant: Lt. Gen. Kurt Wolff, Place of Trial: Brunswick: Date: 1947 Jan.-1949 May
WO 235/336 Defendant: Wolfgang Zeuss, Place of Trial: Wuppertal
Subseries within WO 235 Wolfburg Case
WO 235/604 Defendant: Wolfgang Schwender DJAG No. 6
WO 235/663 Defendant: Adolf Wolfert DJAG No. 250
WO 235/664 Defendant: Wolfgang Zeuss DJAG No. 255
WO 235/1119Defendant: Bilke, Eherl, Etzinger, Feistl, Gatterauer, Hirner, Krenn, Mitter, Mitterbock, Pirmann, Pregartner, Schelch, Schumann, Taucher, Wilding, Wolf, Wurm and others. Place of Trial: Styria: Date 1946 Apr.
Regards,
Rena