Question: General Alfred Keller commanded Luftflotte 2 with a general nicknamed what by his troops?

Context paragraphs:
Albert Kesselring: Albert Kesselring (30 November 1885 – 16 July 1960) was a German "Luftwaffe Generalfeldmarschall" during World War II.  In a military career that spanned both World Wars, Kesselring became one of Nazi Germany's most skilful commanders, and one of the most highly decorated, being one of 27 soldiers awarded the Knight's Cross of the Iron Cross with Oak Leaves, Swords and Diamonds.  Nicknamed "Smiling Albert" by the Allies and "Uncle Albert" by his troops, he was one of the most popular generals of World War II with the rank and file.

Jagdfliegerführer Oberitalien: Jagdfliegerführer Oberitalien (Fighter Leader Northern Italy) was part of Luftflotte 2 (Air Fleet 2), one of the primary divisions of the German Luftwaffe in World War II.  It was formed in July 1943 in Bologna and subordinated to the Luftflotte 2.  The headquarters were located at Bologna and moved to Pontecchio on March 18, 1944, moved again on July 15, 1944 to Verona.

Jagdfliegerführer 2: "Jagdfliegerführer" 2 was part of Luftflotte 2 (Air Fleet 2), one of the primary divisions of the German Luftwaffe in World War II.  It was formed 21 December 1939 in Dortmund.  On 6 September 1943 the unit redesignated Jagdfliegerführer 4 and reformed again in September 1943 from Stab/Jagdfliegerführer Deutsche Bucht.  The headquarters was located at Dortmund and from July 1940 in Wissant, from June 1941 at Le Touquet, and from September 1943 in Stade.  The unit was disbanded in December 1943.

OB Süd: The Commander in Chief in the South ("Oberbefehlshaber Süd") (German: initials OB Süd) commanded all "Luftwaffe" units based in the Mediterranean and North African theatre in World War II.  The command was subordinate to the Italian High Command ("Comando Supremo") .  "OB Süd" was also the commander of "Luftflotte 2".

Alfred Keller: In September 1939, when the Second World War begun, the then General Alfred Keller commanded the 4th Air Corps during the invasion of Poland, assuming this command on 13 October 1939.  The following campaigns, during campaigns against Norway, the Netherlands, Belgium and the Battle of France, he commanded Luftflotte 2 with General Albert Kesselring as his superior.

Hasso von Wedel (general): Hasso von Wedel (20 November 1898 – 3 January 1961) was a German general who commanded the Wehrmacht Propaganda Troops during World War II.  He was directly subordinate to the head of OKW Operations Staff ("Wehrmachtführungsstab, WFSt.") , General Alfred Jodl.  Wedel's Propaganda Department had control over the propaganda units and served to mediate between them and the Reich Propaganda Ministry of Joseph Goebbels.

Fliegerführer Afrika: Fliegerführer Afrika was part of Luftflotte 2 (Air Fleet 2), one of the primary divisions of the German Luftwaffe in World War II.  It operated in the Mediterranean and Libya from 1941–1942.  The commanders were Generalmajor Stefan Fröhlich and Generalleutnant Otto Hoffmann von Waldau, who led the German air support to the German "Afrika Korps" campaign during the winter of 1941–1942.

Jagdfliegerführer Sizilien: Jagdfliegerführer Sizilien was part of Luftflotte 2 (Air Fleet 2), one of the primary divisions of the German Luftwaffe in World War II.  It was formed on April 5, 1943 in Trapani, subordinated to the II.  Fliegerkorps.  The command moved to Rome in July 1943, and was then known as Jagdfliegerführer Luftflotte 2.  The headquarters was located at Trapani and from July 1943 on in Rome.  The unit was disbanded in August, 1943.

Jagdfliegerführer 1: "Jagdfliegerführer" 1 was part of Luftflotte 2 (Air Fleet 2), one of the primary divisions of the German Luftwaffe in World War II.  It was formed on December 21, 1939 in Jever.  Jagdfliegerführer 1 was redesignated Jagdfliegerführer Mitte on April 1, 1941.  The headquarters was located at Jever and from July 1940 on in Stade.

Luftwaffe Order of Battle August 1940: For its Battle of Britain campaign against Great Britain during World War II, the German Luftwaffe had the following Order of Battle in the West. " Luftflotte 2" was responsible for the bombing of southeast England and the London area and based in the Pas-de-Calais area in France. " Luftflotte 3" targeted the West Country, Midlands, and northwest England, from bases a bit further north in France. " Luftflotte 5" targeted the north of England and Scotland, from bases in Norway. " Luftflotte 1" and "Luftflotte 4" were based in Germany, but most of their bomber formations had been reassigned to the three "Luftflotten" engaged in the Battle of Britain.  Some fighters were retained to provide air cover over Germany, however.

Supporting paragraphs: Alfred Keller Albert Kesselring
Answer: Uncle Albert